Category: Solar Panels (Page 1 of 2)

Install solar panels

February 9, 2023 / / 0 Comments

The installation of solar panels or solar energy makes us take advantage of even the smallest energy from the sun to convert it into electricity and thus achieve self-consumption that has little impact on the environment. Although, it also allows us to save in the short and long term by reducing what we pay on the electricity bill.

Most of the companies in charge of the installation of solar panels have information or a previous study in which we will receive advice, analysis or advice on what is best for us according to the consumption we make or the type of house or dwelling we have, related to the number of plates and system that we must install. Although, this is also convenient so that you can get a prior idea about how much it will cost or what we will have to do.

What to keep in mind

We cannot install solar panels when we decide to, without more. At least in Spain. It is not enough to buy them and place them on the roof whenever we want to start benefiting from their advantages, mainly saving on the electricity bill, but we have to have a series of permits and authorizations so that we can confirm that we can install the plates. The permits are divided into two parts: those that we must have before the installation and the procedures that we must do after it. Therefore, we will explain in detail what this type of permit consists of.

Regulations and permits

There are a number of permissions that are essential. First of all, we need a design of the installation system: an authorized installer must carry out the design of the installation that you are going to have and must carry out a technical report that takes into account current regulations. Once you have the system design, you need to request access and connection permits from the distribution company. And the third of the “big” steps is to have a building license that arose from the size of the installation and it will not always be necessary but it will be necessary to make a communication.

Other permits are:

  • Environmental or public utility authorization.

It is not generally necessary for installations of less than 100 kWp (peak kilowatts) although you should consult it depending on the Autonomous Community in which you live or the place where you are going to install the solar panels in case it is a protected territory, for example. It would also be necessary in the case of collective self-consumption or HV connection.

What happens in the case of having to apply for the public utility authorization? Among the possible situations related to this point, this is the most common. According to the Procedural Manual for the Authorization of Projects published by the Government, a series of documents that demonstrate the basis of the request must be attached. For example, the justification report of the whole project, the plans to the scale requested by the community and a detail of everything related to the installation of the solar panels.

  • Administrative and construction authorization

It is only required for large installations. Those smaller than 100 kWp do not need to have administrative authorization, although it is advisable to consult it. When this procedure has to be carried out, it must be done through a ministerial channel. It is a process that usually takes time, so it is recommended to do it calmly.

  • Certificate of completion

As its name indicates, it certifies that the work has been carried out correctly. It will depend on the size of the installation that an electrician or a technician of superior degree does it. It will depend on whether it is more than 10 kWp or less.

Once you have the document, you will have to proceed to its presentation in the Autonomous Community where you are and, in addition, taking into account the city council that corresponds to the place where the installation of the solar panels is going to be carried out.

  • Initial inspection and periodic inspections

It will not be necessary for installations of less than 10 kWp or, at least, not mandatory. Therefore, an initial and periodic inspection by an authorized body must be carried out in the case of public places or damp locations where the installation is to be carried out.

  • Other processes and authorizations
    • Registration of the self-consumption installation if it is an industrial installation: from installations of more than 10 kW.
    • Access contract for the self-consumption installation: if an access contract has been previously obtained for the supply of energy to consumers, it will not be necessary to apply for it.
    • Energy supply contract for auxiliary services: there is no need for photovoltaic self-consumption producers to apply for the supply contract.
    • Representation contract.
    • Surplus compensation contract: when consumers within the solar panels installation are within the model without surplus, they will have the possibility to adopt this compensation system by means of a contract.

Please note that for the legalization of the photovoltaic installation we need an authorized installer. You cannot just install it. That is why it is advisable to get information from the company from which you are going to buy the panels or from an expert or installer who will tell you step by step what to do or what the process is. Some companies offer technical advice and an installer informs us about everything.

Modalities of self-consumption

We must also take into account the current regulations on the installation of solar panels when the user performs a self-consumption. In this case, a distinction is made between self-consumption without surplus or self-consumption with surplus. According to the Royal Decree approved in April 2019, there are two types of self-consumption. Self-consumption with surplus under compensation is not limited to supplying electricity for self-consumption, but also discharges the surplus into the distribution and transmission grids.

And without surplus, as its name suggests, it is an equipment or installation that does not discharge energy to the grid and prevents the surplus from being transferred to the distribution grid. That is to say, you do not receive economic compensation, but the owner is the only responsible for both the “advantages” and possible disadvantages. The great benefit of self-consumption without surpluses is that the procedure is much simpler than in the previous case and some of the requirements of the previous section are not necessary, such as access and connection permits, for example. In general, this case is the most recommendable, since it speeds up all the administrative procedures to be able to carry out the installation.

Advantages and disadvantages

Like any type of energy system, this one has its pros and cons. For this reason, we are going to see what will give us this type of energy system, in addition to the disadvantages that can provide us the fact of wanting to install a solar panel in the house, a local or a ship. Therefore, if you want to make use of it, you will have to take into account what are its strengths and weaknesses, so here are the most important.

Advantages

To begin with, a lower environmental impact thanks to the fact that solar energy, and all renewable energies in general, are not harmful to the environment. Unlike traditional energy sources such as oil, coal, or natural gas, which cause the greenhouse effect and other waste that pollute our air, water and land. Solar panels provide you with a system that is renewable and abundant. The earth receives 120,000 terawatts of solar radiation, 20,000 times the energy needed by the entire world. It is also environmentally friendly, since the sun’s energy does not cause pollution.

Needless to say that the fossil fuels previously mentioned are becoming increasingly scarce, which is one more reason for us to make the leap once and for all to solar energy now that the popularity of photovoltaic installations for self-consumption has increased, which we can already see managed in many communities of owners, and in companies with efficiency certificates.

On the other hand, it reduces electricity costs. Perhaps this is the advantage that most attracts your attention, since solar energy by means of solar panels means substantial savings in the electricity bill, whether the installed system totally or partially supplements the supply from the electricity grid. In addition, the initial investment is recouped in only a 4 to 6 year payback period.

With the new bi-directional meters it is possible that if a household produces more energy than it consumes, this can be returned to the CFE electrical grid, thus giving the user credit. They are also configured as shared systems. Not all houses or buildings have space to place dozens or hundreds of solar panels, which is why community solar gardens are being created, so that people can subscribe to these parks and save electricity.

It is important to note that in the case of Spain, if you remain connected to the conventional grid, the savings are applied directly to consumption, reaching up to a 70% reduction. On the other hand, in passive mode, the contracted power, access tariff, tolls, etc. will be included.

Finally, the installation of solar panels is silent. When you do it, you will not have any associated noise afterwards. And, in addition, it is a low-maintenance task. You hardly need to clean the panels, which have up to 20 years of warranty or more. Everything will depend on the company from which we are going to buy the solar panels and, of course, the installation of the energy system.

Inconveniences

As you have already seen, using solar energy has many positive things, but as in all cases it also has its negative side. On the one hand, you know that it requires a high initial investment, which usually discourages many households that have fewer economic resources. However, in many cases we will be able to pay on a monthly basis. Although, it is clear that the price will also be high or will be much longer in time.

On the other hand, a solar panel really has a limited power. For that reason, in many occasions, this type of energy is not enough to satisfy all the needs that a house requires. To give you an example, a small house in a temperate zone does not usually spend less than 7 Kw per day and a standard panel generates 250 Kw.

Finally, if you want to get some solar panels for your use, you should keep in mind that these are very dependent on the weather. Undoubtedly, it is something to relativize because you can make an average annual or daily hours of sunshine. However, if the weather in your area tends to change a lot and you do not have much capacity to store energy, this may not be the best option for you. And of course, if you don’t have a lot of sun in your area either, it won’t be the best option either. Anyway, it all depends on each specific case and the general circumstances you have.

How they work

In this regard, and beyond everything we can have with these solar panels that are already seen by a good number of places, homes and establishments, it is worth mentioning its operation . Because, despite how simple it may seem at first, it also has its intricacies, like everything else.

As such, we will say that a solar panel generates electricity as long as the particles of sunlight, or photons, hit the electrons to release them from the atoms and set them in motion. This flow of electrons is electricity and solar panels are designed to capture this flow, converting it into a usable electric current.

It should also be noted that these cells, which are usually made of crystalline silicon or gallium arsenide, are mixed with other components such as phosphorus or boron that modify the conductive properties. This creates two parts: one negatively charged and the other positively charged.

This is when, when exposed to the sun, direct current (DC) energy is generated and converted into alternating current (AC) by means of an inverter. This gives as the end the one we all know and that gives rise to the result: that the alternating current energy then flows through the electrical panel of the house and ends up being distributed.

Something important to keep in mind, too, is that the amount of electricity we have in the cell will depend on the size of the cell. Thus, the smaller the cell, the less electricity, and the larger the cell, the more electricity.

Types of solar panels

Regardless of the type that you install, you must take into account that there are a series of permits that must be taken into account before the installation, but also a series of procedures that must be carried out after the installation. There are many types of solar panels on the market and the first thing to consider is which ones you want to install. They are not all the same, although their purpose is. It is for this reason that it is necessary to know well the different plates that you can find. But, in general, we usually differentiate between photovoltaic, thermal and hybrid.

Photovoltaic solar panels use solar energy to convert it into electricity. For its part, the thermal solar panel converts the energy from the sun into thermal energy or heat such as air conditioning or hot water. Finally, the hybrids allow us to use the two previous technologies in the same panels and allow us to produce electricity and heat with the same installation.

In general, you will be interested in hybrid solar panels, since they solve all the energy problems that a house usually has. If you do not opt for hybrid panels, you will have to opt for photovoltaic panels and then use that energy to heat water. That is to say, it is to give more turns to achieve the same thing.

The well-known Tesla also has a system that does not include an installation of solar panels as such, but replaces your roof to “produce clean energy”. Tesla boasts “uncompromisingly elegant solar power” with a sleek design and a solar power system that is fully integrated with the home. In addition, they promise that the shingles last three times longer than traditional shingles and withstand any weather in addition to linking to the Powerwall that stores surplus for when you need it and allows us full control from the Tesla app.

Beneficios carga coche eléctrico placas solares

Costs, savings and amortization

After knowing this series of advantages and disadvantages that can give us the use of this type of energy storage systems, another of the most important points will be the initial investment that we will have to carry out. That is to say, how much it will cost us. And not only this, but we will also be interested in knowing how long it will take to recover the money we have invested in this installation of solar panels or how much we will be able to save in the coming decades if we decide to opt for self-consumption.

Price of the installation

How much does it cost to install solar panels? It depends. It is not like buying a fan, it will depend on many factors. The three most important are: the size of the installation or peak power, the quality of the photovoltaic components or the difficulty of making the installation. It will depend on the size that will cost us more but also that we get a greater return by saving month by month over the next few years. It will depend on the energy you need that you choose to put more or less plates, the consumption you do. It will not be the same to live alone as to be a family with six people who make frequent use of appliances or air conditioning, for example.

In general, for a family with a normal consumption of electricity, the price of the panels will be about 8000 euros. To this must be added the cost of installation, so the final price can rise to about 12,000 euros. In general, it can be assumed that the amortization of the solar panels is carried out in about seven years on average. In other words, you will have recouped your investment in 10 years.

The large furniture company Ikea has its own solar energy system, for example. What Ikea offers us are two systems, SOLSTRALE or its more efficient PLUS version, in different sizes depending on your home or consumption. The most affordable option is four 340W or 390W photovoltaic panels “for home or small house with limited consumption during the day” for about 4,100 euros including VAT in its normal version or about 5,000 euros including VAT in its PLUS version. In the case of the 12 panels offered in its most complete option for “house or larger house, well equipped or with significant consumption during the day” includes twelve panels of 340W or 390W for 6,633 euros or the Plus version for about 7,800 euros including VAT.

We made a brief test where it will tell us which panels are the most suitable according to your roof, whether or not there is shade or other factors such as how much electricity you pay monthly. On this website, you can also make a comparison between different brands according to criteria such as quality-price, reliability, efficiency…

Savings and amortization

How long it will take to amortize the solar panels will depend on many factors. As it is logical, it will depend on the time and conditions of the place where you live. It will not be similar to live in northern areas with rainy weather than in Mediterranean areas where the sun shines almost every day of the year. It is one of the factors that we must take into account to take advantage of the installation. We must also take into account the orientation… It makes no sense to install solar panels with an orientation where the sun never shines, for example.

To understand the amortization we must take into account the IRR or Internal Rate of Return. There are two fundamental factors that help us to calculate the profitability: the price of the installation and the annual energy savings. Calculating the price of the installation is very simple but the difficulty comes with the calculation of the estimated annual savings. It will depend on each house, each routine, each place.

Therefore, to get a calculation of the estimated annual savings we must take into account the price of electricity and the evolution of that price, the consumption made by each user or each house and the production capacity of the solar panels that we have installed.

According to the specialized company SotySolar, the return or amortization is between five and ten years, but it depends on the size of the installation and the payment method. In addition, this company (and many others) offer the possibility of making a study according to your specific situation or according to the installation you want to put as amortizing the installation of solar panels is something very specific. In Sotysolar also indicate that “the most common is to save between 50% and 60% of the electricity bill with self-consumption solutions of photovoltaic panels and recover the investment in less than seven years“. In most cases.

It is a considerable expense at first, but, once the installation is done, it is normal to recover the investment in less than 10 years. And if you take good care of your solar panels, they can last more than 15 years. In addition, we are seeing how every day the electricity bill rises more and more, and it is something that is likely to be maintained over time (we will have to see what changes since Spain and Portugal were classified as energy islands by the European Union).

Therefore, every day that passes it is more worth installing hybrid solar panels in your home, both for hot water and heating as well as for electricity. For this reason, it is important to take into account a series of tips to improve profitability:

  • Choose good and high quality materials.
  • Calculate and study the hours of light.
  • Study and calculate the price of energy.
  • To know the consumptions of the users.
  • To study and to know the hourly habits.
  • Try to make an estimate or predict how it will be in the future.

Beyond energy savings

The savings in the electricity bill are produced in most cases so, making some calculations and analysis of the situation, you may have realized that it pays off economically and you will recover your investment in a few years, which means that the following years you will do nothing but save. But this is not the only benefit you will perceive, since you are contributing to the environment.

One of the main benefits of solar panels is environmental, something that not only benefits you but also the rest of the people. You are taking advantage of renewable energy, which is solar energy. This is free, unlimited and clean. You will avoid using other energy sources that run out and have a cost. In addition, you will help to avoid and reduce CO2 emissions and other substances present in the atmosphere.

The sun is an energy source that can be harnessed much more than it is, and this is your chance. Photovoltaic installations are a sustainable and clean way of obtaining energy, and it is an investment that is more than compensated. In addition, if you do not have money to make this investment, some energy, financial and other companies give you facilities so that you do not make this full economic outlay at the time.

How to charge a battery with a solar panel

February 8, 2023 / / 2 Comments

The option of connecting photovoltaic solar panels to a battery is a cost-effective and suitable option so that you can count on your equipment at full performance, whenever you will need them. The cases in which this option is most useful are for equipment that are used outdoors, such as tractors, motor boats, golf carts… Which, on many occasions, are not used for days or even months.

Connecting the battery to the panels is a simple task. However, in order for the solar panels to be able to supply your battery, you must first calculate how many panels you are going to need. To do this you will need to find out the amperage of your battery and the capacity of your solar panels. Here’s how to do it.

First step, how many Ah does the battery have?

First of all, you must find out what is the amperage per hour rate of the accumulator or battery you want to charge. You must know that, a battery of the calls of wet cells, diminishes its amperage around 1% daily when we are not using it. So, for example, we would need a solar panel capable of generating 0.5 amperes per hour per day, in case we want to keep a 50 amp battery always charged. The disadvantage is that the photovoltaic solar panels are classified according to their capacity in watts, so we will have to apply a simple mathematical formula to solve our unknown.

If you want to convert the capacity of a solar panel from watts to amps, you must divide the capacity of the panel in watts by 15. For example, a solar photovoltaic panel with a capacity of 50 watts is capable of obtaining about 3.33 amps. Then, if we take into account possible obstructions during sunrise and sunset, bad weather and possible clouds that may come out during the day, a solar panel is capable of supplying about four hours of output per day. Thus, a solar panel with a capacity of 50 watts will produce 4 × 3.33 amps per hour per day, or 13.33 amps per hour. So, the panel will be completely sufficient to get our 50 amp battery, can remain with its full charge capacity to the maximum.

Second step, make the connections.

Once we have calculated our needs, we can now move on to making the connections. In the first place, you must connect the positive cable with a fuse, from the photovoltaic solar panel to the battery. In this way we will be able to prevent us before a possible explosion or fire of the accumulator, in the case in which a short-circuit in the cable takes place. Later the negative cable of the photovoltaic solar panel is connected to the negative terminal of the battery.

If it is necessary to interconnect panels to charge your battery, we recommend that you connect your solar panels in a parallel circuit. In this way, you will have the option of using panels with a lower cost and also lower power, thus achieving the same effect as with a solar panel with more energy.

To connect the panels in parallel, you must connect the positive wire of the first panel with the second one, and so on consecutively. Perform the same operation with the wiring of the negative pole, and finally link the remaining wires to the battery.

Now you must calculate the amperage of your solar panels that are connected in parallel. You must know that the solar panels that have been connected in parallel circuits, continue conserving the same electrical tension, and the intensity of the current is added. That is to say, if we have five solar panels with a capacity of 5 amperes, we will get 25 amperes of power, and all of them would have the same constant voltage.

How much energy does a solar panel produce

February 8, 2023 / / 0 Comments

When referring to self-consumption, one of the most frequently asked questions is how many kWh a solar panel produces. The answer to this question depends on the price of the project and the space for the installation. Knowing in depth how many kWh can produce a plate, depends on the power and different factors that you should keep in mind. The panels have different numbers in reference to their power, but you should understand what they mean.

How much kWh does a solar panel produce

The answer to this question will depend on the panel since there are different power ratings. Another very important aspect to keep in mind is that over the years the power of the panels has been increasing. At the same time, prices have been decreasing.

The power generated by solar panels is measured in watts (W). There are different powers in the panels, you will find it indicated on the plate that you are looking for your installation. The power between solar panels ranges from 250W to 300W of energy. But it is true that nowadays it is common to see solar panels in homes with higher powers, such as 500W, there are also some of lower powers such as 150W.

In the case that you have a common panel of about 300W, this indicates that for every hour of sunshine the power generated is 300W. This leads to the following calculations, suppose it is a sunny spring day, in a warm area, the calculation would be:

 

300W x 5 hours of sunshine per day = 1500W or what is the same, 1.5 kWh per day.

 

To make the annual check, suppose that these five hours are an annual average (compensating the hours of less sunshine in winter by the hours of more sunshine in summer), you will make the following calculation:

1.5 kWh per day x 365 days of the year = 547 kWh per year for a 300W solar panel.

With this data you can make approximations, the consumption of kWh needed by an average home is about 8000kWh per year. This allows you to make the installation with the size and panels you need to meet the needs of your home.

The hours of sunshine and its impact on the kWh produced by a solar panel

In the previous example it is simple, calculating 5 hours of sunshine in a warm area, in the spring-summer season, but is it too little for the cities in the south of the country?

What you should consider when buying a panel and the first thing you should look at is the wattage of the solar panels 300W or 500W. These numbers refer to the power that the panels can provide under optimal conditions.

But these conditions are not always and not everywhere.

Thus, there may be 6, 9, or 12 hours of sunshine in both northern and southern cities in summer, but very different hours of sunshine.

The incidence of the sun on the panels is higher in hot areas, so it is more likely that in these areas the panels reach the appropriate power 300W during the year. But in other cases it will be more difficult.

The new materials and innovations that are made in solar panels, are getting that even on days in which the weather conditions are not suitable, you can extract energy, without reaching the maximum.

These are the three most important factors to take into account when it comes to knowing how much power a solar panel offers:

1. The power of the panel, this refers to the watts of the plate that you see in the catalog or on the label.

2. The hours of sunshine that receives the place where the plate is to be installed.

3. The incidence of sun in the place where the installation is carried out.

It is true that to use this tool you must have some technical knowledge about photovoltaic energy.

The solar panels have a nominal generation power, which reaches in suitable conditions and should be guided by it.

However, it is true that it may not always reach this power, depending on the geographical area in which the installation is located. Therefore, you must take into account the three points mentioned above. Without them, you cannot make a real calculation of the kWh that the panel of your installation can generate.

What kWh output should you choose for your solar panel?

The answer to this question depends on:

– The budget you have.

– Your energy consumption and how much you want to cover with solar energy.

– The amount of space you have available for the installation.

The solar panels that have a higher power have a larger size, but can occupy a smaller total space. The price of these panels is higher, although it can be, that the set comes out more economical than a greater number of plates with less power.

If you take into account all the tips in this post, you will be able to solve your doubts and find your way around kWh and panels of all types.

How to install solar panels

February 7, 2023 / / 0 Comments

The installation of solar panels is a process that consists of several stages. We are going to explain you how to install a solar panel system in your house and what you have to do, from the project, to the commissioning and registration.

Stages prior to the installation of solar panels

  • The first step in the process of installing solar panels is to obtain a proposal for the photovoltaic installation based on the possibilities of the house and an analysis of the current consumption generated by the house.
  • The second step consists of having a team of professionals who know how to install solar panels carry out a preliminary study of the typology, orientation and surface of your roof, as well as the possible associated shadows to determine if all the requirements for the installation of solar panels are met and to select the installation that best suits it and your consumption habits. This will help to obtain a better performance from the photovoltaic installation.
  • Once this is done, a series of procedures and licenses must be presented to the corresponding town hall, for which, in most cases, we must wait until they are approved by the town hall. In addition, the corresponding fees and/or taxes that apply in each case must be paid. It should be taken into account that there are bonuses available for self-consumption installations.
  • Once all the previous steps have been covered, the photovoltaic installation on your roof can be carried out.

Below we detail the installation process itself.

How is the installation of solar panels carried out?

We explain the methodology, step by step, on how to install photovoltaic solar panels. However, we must bear in mind that it is a meticulous process and that it must be done with the utmost care by the responsible technician to ensure the optimal functioning of the system and avoid future problems.

First step: mounting the supports of the photovoltaic system

Before placing the solar panels on the roof, it is necessary to place the supports for them on the roof. Depending on the type and inclination of the roof, the type of structure to be used will vary. For example, the support structure will not be the same on a roof whose modules are placed coplanar to it, than on a flat roof in which the modules have to be inclined in a certain way to obtain the highest possible efficiency of the system, and also ballast the structure to avoid the so-called “sail effect” (that is, to ensure that the panels and structure do not “fly off” due to the effect of the wind).

Second step: Fixing the roof and the solar panels

Once the structure is in place, we must attach it to the roof and place the photovoltaic panels on it. Depending on the type and inclination of the roof, this process is carried out in different ways.

The most usual is that the roof is inclined (in Spain the great majority of the roofs are inclined between 20º and 35º, which favors the performance of our installation) and of Arabic type tile, nevertheless it can be a different case, like slate tiles or flat roofs covered with asphalt fabric, among others. The anchoring of the support structure will vary depending on the roof on which it will be anchored.
Once the structure is anchored on the roof, the modules are placed and fixed to the roof after which they are interconnected to each other, and finally connected to the inverter.

 

Third step: The connection to the electrical inverter

The interconnection of the panels is done in series between the modules of the same row or string, and in parallel to connect the rows to each other depending on the panel/inverter configuration. This is done by means of so-called MC4 connectors to connect the modules in parallel, or directly to the inverter. It is important to tighten the connectors firmly, as a bad connection will have a negative impact on the overall performance of the installation causing possible problems such as the so-called hot spots, which can also affect the panel structure itself.

In this way the total electrical generation of the module system is led to the same point, whose final destination is to reach the inverter.

Finally, a parallel connection is made, which can be made directly to the inverter, thus completing the direct current (DC) part of the installation, and all the energy collected by each panel is conducted through solar radiation in the form of electric current to the inverter, which will be located at a point near the electrical panel of the house.

It is important that the inverter is sheltered from the sun’s rays, that is, they should not be located on the south side of the house as its performance is affected if they heat up, so it is advisable to locate it inside the house, or if it is not possible and place it outside, provide it with some element of protection.

The function of the inverter is simply to convert the electricity it receives in the form of direct current to alternating current, which is the one we use in our homes on a daily basis. This change is made automatically by the inverter, with a specific magnitude and frequency, so that we can enjoy it without major worries.
Finally, the inverter is connected to the electrical panel, as if it were a separate circuit of the house, thus completing the installation of alternating current (AC).

Fourth step: Connecting the batteries

If you are going to choose to store the energy you generate, apart from how to install the solar panels in your house, you are also interested in how to connect the batteries.
First you must have a hybrid inverter, capable of managing the charging and discharging of the batteries, as they are the most expensive and delicate element of the system. The storage capacity of your batteries will depend on your demand and the installed PV field.

There is more than one way to do it, depending on the voltage and capacity needed. The connection of the batteries can be done in parallel, in series or in series and in parallel, always with equal batteries. In the case of parallel connections, the capacity of the batteries is doubled, but the same voltage is maintained. In the case of the connection in series, the obtained results are going to be opposite: the capacity of the batteries is maintained, but the tension is the double. And finally, if you opt for a connection in series and parallel, both the capacity and the voltage will double.

Conclusion

The installation of solar panels consists of:

  • Mounting the supports of the plates
  • Fixing the roof
  • Fixing the solar panels
  • Connecting the system to the inverter
  • Connecting the inverter to the electrical panel
  • Connecting the batteries in the case of off-grid installations.

Now that we have told you how to install solar panels, you know that the installation of photovoltaic panels is a laborious and complicated job for anyone without electrical knowledge, so it is always recommended to leave it in the hands of industry professionals with experience in this type of assembly.

In addition, electrical, urban and health and safety regulations must be complied with, and various protections must be taken into account at all times, both in relation to the height and location of the work and the electrical risks associated with the installation (safety harness, suitable footwear, helmet, protective gloves…).

These installations must also be carried out in accordance with the stipulated guidelines and regulations.

How are solar panels made

February 7, 2023 / / 0 Comments

Solar panels have become more affordable than ever due to manufacturing efficiencies. They are increasingly seen on rooftops of many homes and commercial properties.

But what solar panels are made of and how solar panels are manufactured remains a mystery to many people who value installing solar panels on their home, business, farmland or property.

If you want to know more about how a solar panel is made, read on for more information.

What are solar panels made of?

Most solar panels are made of silicon wafers. Silicon is abundant on our planet. In fact, it is the second most available element on earth, second only to oxygen. And it is with this chemical element, silicon, that the whole process of manufacturing photovoltaic cells and solar panels begins.

Having silicon as the basis for the manufacture of a solar panel and its base plate where the cells are glued, we find other parts when forming a solar panel, such as the glass cover, steel frame that ensures the integrity of the panel and joins all parts, terminal box and protection diodes, which ensure the flow of electric current.

Gallium arsenide is also used, although these are manufactured mainly for photovoltaic use.

Silicon in solar panels

Solar cells are made from crystalline silicon that is melted and then mixed with gallium or boron to form wafers called silicon ingots. Phosphorus is then added to the silicon and, together with gallium or boron, gives the silicon its electrical capacity.


Silicio en paneles solares

Silicon in solar panels

These silicon wafers are cut as thinly as possible into thin sheets to reduce waste and increase production efficiency.

Because pure silicon is shiny, it reflects sunlight.

To reduce the amount of sunlight lost, an anti-reflective coating is placed on the silicon wafer.

 

Monocrystalline solar panels are formed from one silicon fragment, but for polycrystalline panels, many silicon fragments are fused into a large sheet to form the silicon wafers of the solar panel.

How are solar panels made?

So, we already know that silicon is an essential component in how a solar panel is made, but what is its manufacturing process?

Silicon is heated at high temperatures in a furnace. Once melted, we obtain ingots in the shape of a cylinder.

When the ingots have cooled completely, they are polished to produce smooth, flat sides. Once the ingot is smooth and even, disks, also known as silicon wafers, which are only a few millimeters thick, are cut. The silicon wafers are cut as thinly as possible to reduce waste and increase production efficiency.

A metallic conductor such as boron is then added to the silicon wafers to give them their electrical capacity. The solar cells are unbalanced to conduct energy, so when the solar panel is formed, these cells are layered and soldered together in a grid-like array.

Finally, a robust, weather-resistant glass is placed on top. The glass is added during the manufacturing process and the solar panels are coated with an anti-reflective coating that encourages the absorption of sunlight, rather than reflecting it.

How do solar panels work?

When sunlight hits the panel, the imbalance stimulates the electrons in the solar cells to move to correct each other. This process is responsible for generating electricity.

The panels capture the sun’s rays and transform them into electricity by means of the photovoltaic cells that cover them.

It is worth noting the grooves that make up the solar cells and that are precisely the conductors of electricity.

The solar cells (photovoltaic cells) are electrically connected to each other in series and parallel, thus achieving the necessary voltage for their use.

And this electricity collected from the solar panels is converted from direct current to alternating current through an inverter, which we then consume in our home.

Conclusions

With this article, we have talked about the whole manufacturing process of a solar panel and the most important component, the silicon.

Although if we go into detail, there are other processes included in the manufacture of solar panels such as cleaning the wafers to remove irregularities and surface defects remaining after cutting into wafers or also a test, once the manufacturing process of the cells, where the defective ones are removed according to their characteristics of voltage and current supplied.

We hope you now know a little more about the whole process of how a solar panel is manufactured.

Do solar panels work at night?

February 7, 2023 / / 0 Comments

One of the most common questions among users interested in solar energy is whether it works at night or on cloudy days. In the midst of the boom in solar energy, and renewable energies in general, it is necessary to clarify this question and explain how solar panels work when there is no light. Do you have any doubts about this? Keep reading this article!

What happens with solar energy at night?

Solar energy is a type of energy that works by directly harnessing the sun’s electromagnetic radiation. For this purpose, solar panels are used, which can be thermal or photovoltaic, thanks to which heating or electricity is generated, respectively. As we said, solar energy takes advantage of the sun’s radiation, therefore, for solar panels to generate energy it is necessary that there is light. Thus, solar energy stops its production at night. However, this does not mean that solar energy stops working at night -or that the investment in a solar installation is no longer profitable-, since the self-consumption systems in a home, in the case of isolated installations, include batteries in which the electricity generated during the day -in the case of photovoltaic solar panels- can be stored.

These can be used to make use of solar energy without the sun. Of course, it all depends on the capacity of the batteries, as well as the amount of energy that has been generated during the day. It should be noted that batteries can store all the surplus energy that is not being used during the day.

What happens with solar energy on cloudy days?

As we said, for a solar panel to work, it is necessary for it to receive sunlight. In cases where the weather is not suitable, either because it is cloudy or rainy, solar panels do not stop working. They continue to generate electricity, but the production capacity decreases compared to sunny days. In general, the yield is usually 10% to 25% compared to the usual yield. This varies depending on the technology used – whether they are monocrystalline or polycrystalline plates – and the thickness of the clouds. In fact, if there is little cloud cover and the clouds are not very thick, it is possible for solar panels to operate at up to 60% capacity.

Cold or hot temperatures What is the ideal temperature for the operation of a solar panel?

Despite popular belief, the hotter it gets, the more efficient the solar panel will not always be. Although we have already seen that solar energy cannot be used without the sun, unless, of course, the sky is cloudy, we must bear in mind that cold or temperature have nothing to do with the performance of the solar panel, it is the radiation that has an influence. In fact, when solar panels exceed a temperature of 25ºC, efficiency tends to decrease between 10% and 25%. This is shown on the labeling of each solar panel. Generally, the output power is 25ºC -the standard power-. So, on foggy days or in cool climates it can work better than we think, sometimes better than on days with lots of sunshine and very high temperatures.

The efficiency of solar panels

The efficiency of solar panels translates into the amount of energy they are able to convert into electricity. That is, what percentage of the sunlight they receive they can harness and convert into electricity. Of course, the higher this is, the more efficient the solar panel will be and the greater the amount it generates (this is expressed in kWh), and this is what we are most interested in as opposed to savings. In general, solar panels use between 19% and 22% of the energy – the latter are the most efficient on the market to date. Although we have also found some records of solar panels that have an efficiency of 24%.

How to make the most of solar radiation

We have already talked about what happens with solar energy at night and with solar energy without sun -as in cloudy days-. However, not everything has to do with the time of day or weather conditions when it comes to making the most of solar energy. The use of solar energy depends largely on:

  • The orientation of the roof: Depending on the orientation you can maximize the use of solar panels, making the most of solar radiation. You should always opt for the south orientation -whenever possible-. Production will decrease when the solar panels are facing east or west, but they should never be installed if the orientation is north.
  • The inclination of the solar panel: The inclination also influences the productivity of the solar panels, therefore, this should be adjusted according to the season of the year; or opt for an intermediate point to keep it fixed throughout the year. In the first case, for the summer season, it will be necessary to opt for an inclination of 10º to 15º; while in the winter season it is necessary to opt for 45º to 50º. In the second case, if you prefer to keep the solar panels fixed throughout the year, it is advisable that they have an inclination of 30º to 40º.

Where to buy quality solar panels?

BlueSolarPanel is one of the companies specializing in the sale of quality solar panels at a good price. In our store you can find a large number of solar panel kits, as well as photovoltaic solar panels of all types and other elements of the installation, such as batteries -to make use of solar energy at night or use solar energy without sun-, charge controllers, inverters and solar panel structures. We offer you the best value for money in the market.

What material are solar panels made of?

February 7, 2023 / / 0 Comments

Solar panels are technological devices whose main mission is to transform solar energy into electrical energy. These panels, also known as solar panels, are made up of photovoltaic cells responsible for capturing solar radiation. But what material are solar panels made of?

Solar panels are becoming increasingly fashionable. Not surprisingly, the use of solar energy means significant savings on electricity bills practically from the first month. But in addition to these savings, the installation of solar panels revalues the house and reduces its carbon footprint by not emitting polluting CO2 emissions.

What material are solar panels made of?

Solar panels are made of different materials. The use of one or the other may vary depending on each manufacturer. However, most of these materials are generally used for all panels.

We have already seen that solar panels consist of photovoltaic cells. These cells, which are interconnected with each other, are made of crystalline silicon (most of them) or gallium arsenide, both conductive materials. If silicon cells are involved, they can be of 3 different types:

  • Monocrystalline silicon (the most efficient, they give the panel a uniform dark blue or black shade).
  • Polycrystalline silicon (less efficient than the previous ones but more economical, they give the panel a deep blue color).
  • Amorphous silicon (the cheapest panels, usually thinner and more flexible than the previous ones).

The silicon used as solar panel material is usually cut into small pieces, either monocrystalline, polycrystalline or amorphous. After cutting, they are polished and wrapped with metallized conductors and other components. You can read more about how are solar panels made in this post.

Copper is another material that is widely used in the manufacture of solar panels. It is estimated that solar panels using copper as a conductor instead of silver are the most economical and efficient on the market. The same is true of plastic, which is very common in junction boxes.

What are the elements of a solar panel?

A solar panel has a series of fundamental elements. The first thing that can be seen is its layer of tempered glass, which usually has a thickness ranging from 3 to 5 millimeters. Glass is a material that also acts as a protector for the panel. This entire glass layer is covered by an anodized or powder-coated aluminum frame, a very rigid metal that protects the solar panel from any corrosion problems.

In most cases, a layer of thermally conductive cement is applied on top of the tempered glass. This material is used to prevent the solar panel from overheating at some point.

Another fundamental element of the solar panel is the back cover. It consists of several layers that can be made of tedlar polyvinyl fluoride, kynar polyvinyl fluoride or polyethylene terephthalate. The main function of this back cover is to protect the rest of the solar panel components.

Finally, the junction box and the encapsulant must be mentioned. The latter is made of ethylene vinyl acetate (EVA), the most sunlight-resistant material of all.

The panels we use at BSP

At BSP we only work with the best panel manufacturers in the world, to offer you the most powerful panels with the best guarantees in the market, according to Bloomberg’s valuation studies.

We have various ranges to customize your installation according to your needs and budget.

Switch now to clean energy and start saving on your bill, take the solar leap with Blue Solar Panel!

Solar panel maintenance

February 7, 2023 / / 0 Comments

Solar panels have great resistance and durability, however their production can be reduced if we do not carry out proper maintenance on them. This maximum production of solar panels is only reached under ideal conditions, since in reality there are losses caused by a multitude of factors such as poor orientation and inclination, shadows or accumulated dust and dirt.

The solution to these setbacks lies in a correct and methodical maintenance of the photovoltaic solar panels. The maintenance of these solar panels must be carried out taking into account a series of conditions to reach the maximum production of these devices. We explain it to you below.

What happens if I do not carry out correct maintenance of solar panels?

The loss of performance caused by the lack of cleaning of the photovoltaic solar panels could reach up to 8% in places where a lot of dust is produced. This means that special attention must be paid in industrial warehouses or areas heavily used by vehicles.

This loss of performance of solar modules is explained because these photovoltaic solar panels are made up of silicon cells, which react to the impact of photons, producing electrical energy. Therefore, keeping the surface of solar panels clean is essential so that the cells are able to receive the maximum possible radiation.

These losses can be reduced if we carry out a good cleaning frequently, keeping losses below 1% during the useful life of the solar panels.

How is the maintenance of solar panels carried out?

The cleaning of solar panels is very similar to the one we can do on the windows of our house. It will be necessary to use water with a small amount of soap to make it easier to rinse later. It is not recommended to use detergents or harsh cleaning materials as we can permanently damage the surface of the panel.

Bearing this in mind, the best way to clean the module is using a soft sponge and a small amount of dishwashing liquid, pre-wetting the dirt so that it is easier to remove later. Finally, rinse the panel abundantly with water without leaving soap residue.

As a general rule, it is recommended to carry out this cleaning 3 or 4 times a year, or more frequently if it is an area with a high level of dust and dirt.

When performing maintenance on any type of equipment, it is important to put safety first and foremost. Before carrying out any maintenance or repair task, it is essential to read the instructions of the manufacturer and become familiar with proper procedures and safety precautions.

In addition to this, the owner of the solar panels must be attentive to the other elements of the photovoltaic system and replace them if they are already defective.

Some advice for the maintenance of solar panels

The maintenance of the solar panels is essential to ensure the good performance of the installation and to be able to benefit from the maximum production of the photovoltaic modules. The following tips may be helpful in ensuring proper maintenance:

1. Visual inspection: It is necessary to periodically carry out a visual inspection to detect any defect that may exist in the installation: broken or damaged panels, broken cables or accumulation of dirt and dust.

2. Cleaning: It is essential to periodically clean the solar panels, especially in dusty and sandy areas. This must be done with a soft brush, avoiding the use of any type of chemical product.

person cleaning solar panel

3. Orientation and inclination: The orientation and inclination of the solar panels should be checked periodically to ensure that they continue to point towards the sun. If the panels are not correctly oriented, it can decrease the production of the installation.

4. Electrical Connections: The electrical connections of the solar panel should be checked periodically to ensure that they are secure and that there is no risk of electrical shock.

5. Temperature: The temperature of the solar panels should be checked periodically to ensure that it is within the recommended operating temperature range. If the temperature is too high, it can reduce the efficiency of the array of panels.

Regular maintenance of solar panels is key to guarantee optimal performance, thus ensuring that you can benefit from the maximum production of photovoltaic modules. Keep in mind that the larger the photovoltaic installation, the more attention will have to be paid to the maintenance of the solar panels and the system components.

By following these tips you will make sure you get the most out of your solar panels and prolong their useful life.

man repairing solar panel

Solar panel repair: all you need to know

February 7, 2023 / / 0 Comments

What should I do if my solar panel breaks?

A solar panel has a useful life of more than 25 years. However, it is likely to experience minor problems at times during its life cycle. Switching to solar energy has many benefits, but it can also open the door to many unknowns. Can the panels break? What do I do if a panel breaks? Will I have to change the entire installation? Is there any danger to my house? Do not worry, from the team of Blue Solar Panel, we present the answers to all your questions on how to repair a solar panel.

The most effective way to keep solar panels in optimal condition is through proper maintenance. Here are some tips on how to maintain solar panels:

  1. It will be necessary to make sure that the solar panel glass is free of debris that can damage the system.
  2. While cleaning the panels, always use lukewarm water as the solar panel is already hot due to exposure to sunlight. The use of warm water will also be more effective in removing dirt and dust. Solar panels are more prone to breakage if rinsed with cold water due to the sharp temperature contrast between the water and the panel.

We explain more about solar panel maintenance in this post and how to clean your panels in this post.

There are a wide variety of factors that can damage your solar panels. Situations such as hurricanes, high winds and large hail storms can cause damage to your solar panel. Fortunately, in some cases solar panels can be repaired and you may avoid having to buy new ones.

What to do if the panels are broken?

The first thing to do is to examine the extent of the damage to the affected solar system. Absolutely check the entire installation, including the wiring, glass components and mounting frame. Be sure to inspect every inch so that you don’t miss any damaged parts.

The first repair that can be made is to repair the mounting frame if it is damaged in any way. Make sure that the bolts and wires holding the frame are in the right place and are not damaged because if there have been strong winds, they could have damaged the mounting frame. Therefore, the solar panels will be tightened to confirm that the mounting frame is secure. On the other hand, we will have to make sure that the damaged cables are replaced with new ones.

Before repairing broken solar panel glass, we have to make sure that the photovoltaic panel is working. To do this, we will have to make the solar panel work for 24 hours in a row and check if it generates energy. Broken panels do not generate as much power, but as long as they produce some power they do not break down. If the panels still generate power despite their condition, the damaged glass should be repaired and in the case of minor glass breakage, the glass does not need to be replaced.

To proceed with the glass repair, first, we must make sure to trim the tape so that it only covers a small portion of the glass. If the glass has cracks on the surface, it will need to be replaced by removing the glass from the support and replacing it.

On the other hand, if loose connections are found during the initial inspection, they will need to be repaired immediately by cutting into the silicone that is embedded in the solar cells. Once you have exposed the cells, you will want to reach behind the cells to resolve the loose connections. Another way to solve the problem is by impregnating silver to reattach the loose wires or by using wire bonding elements.

Another reason why solar panels would have to be repaired is because of burnt terminals. Therefore, the terminals of the solar system should be tested to make sure that they are working and if we find one that is not working, it should be replaced immediately. This action is simple and will only take a few minutes (remember to work without power).

Another factor that can cause damage is lightning strikes on the solar panels. To prevent this from happening, install the panels away from tall trees if the installation area is prone to this type of weather phenomena. If the solar panel is damaged by lightning, the solar energy supplier and installer should be called because it is difficult to repair a solar panel damaged by lightning. It is advisable to require a complete replacement of the panel or system.

The repair of solar panels can cost between 100 $ – 1500 $. The most common repair problems are cracked panels, broken glass and loose connections due to poor installation. It should be noted that the solar installation provider should be responsible for the repair and replacement of a broken solar panel. Therefore, it is advisable to choose the right solar panel installation company.

How to repair a solar panel?

A solar panel has a useful life of about 25 years or more, but over that time it can be affected by external factors that affect its performance.

If you think your panel is broken, the first thing you should do is to examine the type of damage that is affecting your solar installation:

  • Check the wiring.
  • Check the glass components.
  • Inspect the mounting frame.

It is important to look at all the small parts of the solar panel so as not to overlook any element that may be damaged, no matter how small.

How do I know if my solar panel is broken?

If you think your solar panel is broken, you can check it in the following way:

1. Read the manufacturer’s specifications and take note: output power, single voltage and optimum current.

2. Use a multimeter to take measurements: these are devices used to measure voltage and current values. The figures of our installation should be very similar to the manufacturer’s specifications.

  • Connect the tips of the multimeter to the terminals of the solar panel and make sure that the sun is shining on it. The positive (+) terminal will have the red tip and the negative (-) terminal will have the black tip.
  • Connect the wires to the multimeter. The red wire should be connected to the terminal with the VΩ symbol, and the black wire to the COM symbol. This way we can measure the voltage. You should also measure the DC current.

What to do if a solar panel needs to be repaired?

When we want to repair a solar panel we need to inspect well the whole installation in order not to skip any damaged part. It is important to perform all the checks without power.

  • Mounting frame: make sure that the ports and wires that hold the frame are in the right place and are not damaged.
  • Solar panel performance: to know if the glass is broken, we must check that the solar panel is capable of operating for 24 hours. A broken panel does not generate as much energy, so this way we will see if they all perform equally.
  • If you find loose connections or burned terminals you will have to repair them urgently.

To fix a solar panel you must consider if the repair can be done on site or if it must be done in a repair center.

Solar panel repair centers will know how to fix your solar panel faster and will replace damaged photovoltaic modules without any problem. However, the replacement of bypass diodes found in junction boxes, plugs, damaged solar cables, among others, can be repaired at the installation site.

In the end, in order not to lose neither the warranty nor the functionality of the solar panel, it is best to hire professional solar energy services, thus improving production efficiency and avoiding a possible long-term failure.

The most common problems with solar panels repairs

Like any other device, solar panels can suffer inconveniences that end up causing a decrease in performance in the medium to long term, making a repair more than necessary.

Here are the most common problems that a solar panel can have.

Solar panel with broken or cracked glass

It is one of the most common and very easy to notice. It may be due to a bad transport, the impact of a hard object with the solar panel itself, or any other similar option that causes a crack in the plate is getting bigger and bigger.

Solar panel with defect in the cables

This failure can occur as a result of bad connections between some cables and others, which produce overvoltages or overcurrents. Or it can also be due to a bad assembly of ground wires, that is to say, to the system that protects us against any defect in the insulation.

My solar panel gets too hot

Hotspots or hot spots cause too much heat to be generated inside the photovoltaic module, which can cause a fire or destruction of the panel. This problem is caused by:

  • Inadequate soldering.
  • A break in the photovoltaic cells.
  • Prolonged shading in a certain area.
  • Dirt on the solar panel.

What do I do if I see a failure in the solar panel?

The best thing to do if you see any of these faults is to call the company that has provided you with the solar panels to send a technician to make an assessment and define the damage.

How to take care of a solar panel?

If you want to keep your solar panel in optimal conditions, the best thing to do is to use water and a little soap for a simple rinse.

To clean a panel, it is best to use a soft sponge soaked in a small amount of dishwashing liquid and remove the dirt. As always, you have to rinse it very well so that no soap residue remains.

In any case, it is always advisable to follow the manufacturer’s instructions and repeat this cleaning 3 or 4 times a year, depending on whether the area where your solar panels are located tends to accumulate more or less dust and dirt.

Tips for the maintenance of the solar panel

  • If you clean it with soap and water, make sure that no residue remains.
  • Do not use pressurized water as this may damage the panel.
  • Avoid cleaning on windy days.
  • If the solar panels are located at high altitude, it is better to call a professional to avoid possible occupational hazards.

 

FAQS

How long does a solar panel last?

A solar panel has a lifetime of more than 25 years. To achieve optimal durability conditions, it is necessary to follow and respect the maintenance instructions.

What do I do if I break a solar panel by accident?

Solar panels are strong and built to last, however, in case of an accident the solar panel can continue to generate energy. If you notice any problems, contact the company that provided you with the solar panels and have them send a technician to evaluate the situation.

Do I have to clean my solar panels?

Solar panels should be cleaned 3 or 4 times a year. They do not need to be cleaned daily as they are designed to withstand all types of weather. You can find more information on how to clean solar panels in this post.

What happens if the solar panel gets wet?

Solar panels are built so that you don’t have to worry about this, as the panel technology itself has been assembled with a strong frame and tempered glass that can be exposed to weather and rain.

 

placa-solar-furgoneta-camper-

Portable solar panels 2023

January 7, 2023 / / 3 Comments

One of the fundamental premises of anyone who wants to enjoy a trip in a camper van is independence. Being able to get lost in a remote place for days without depending on anything and maintaining comfort in our apartment on wheels.

Photovoltaic installations are a perfect complement to achieve this and there are many options available on the market, so let’s explain what types of solar panels we have for camper vans.

How is the electrical installation in a camper van?

Nissan Nv300 Camper Sea 2021 1595 Mc 1 Scaled

First of all let’s remember that to maximize the autonomy with which we will feed the consumables of the camper vans, its electrical installation is usually composed of the main battery of the vehicle intended for regular use and a second battery dedicated to the lighting of the rooms, refrigerator, water pumps, heating, inverter and other elements. We have already talked at length about secondary batteries.


Las mejores furgonetas grandes para hacerte la camper Gran Volumen definitiva, de la Fiat Ducato a la Ford Transit

To recharge this second battery, a relay is normally used that allows the passage of electricity from the alternator when the engine is running and isolates it when the van is stopped. Thus there is no consumption of the main battery.

If we are going to be stopped for a long time enjoying an idyllic place, our secondary battery will be discharged without the energy from the alternator and that is where the solar panels come into play.

It is necessary to remember that to take care of the secondary battery the ideal is that the discharge does not go beyond 50% of the capacity of the battery. Going below this percentage could significantly shorten its useful life and here we have to play with the combination of the capacity of the secondary battery and the production of the photovoltaic installation.

What types of solar panels do we have for our camper?

Toyota Prius Plug In 2021 Prueba 015

Yes, we know it is the roof of a Prius, and not a camper.

Consumer solar energy has come a long way in recent years thanks to its expansion in the domestic sphere, and that also benefits us when we want to install a solar panel on a camper van or motorhome.

In this way we can choose several types of panels with different power levels to recharge the batteries of our vehicles depending on the needs we may have.

Kit 200W CAMPER 12V panel solar placa monocristalina células PERC de alta eficiencia

Kit 200W CAMPER 12V solar panel monocrystalline plate PERC high efficiency cells

We have installation kits with monocrystalline or polycrystalline panels (there are other types of panels but they are not suitable for this use). In both cases these panels are based on silicon mineral, structured by cells of regular size and can be rigid or flexible.

The difference between the two types lies in their purity. Monocrystalline panels are formed by laminating cells from a single block of silicon, while polycrystalline panels are formed by melting the silicon, which is poured into a mold.

placa-solar-furgoneta-camper-

Since impurities are not removed in the manufacturing process in polycrystalline panels and are non-existent in monocrystalline panels, the performance of monocrystalline panel cells is higher and they are more efficient. They can perform 20% better under optimum conditions and are less sensitive to temperature variations above 25ºC.


Todo lo que hay que saber antes de comprar una furgoneta para camperizar

In addition to rigid panels, we also have flexible panels. They use the same technology but their weight and size are much more moderate. On the other hand, they are also much more fragile panels because they do not have a structure or a layer of glass to protect the cells. They are also less efficient as the temperature rises as there is no separation between the sheet metal of the vehicle and the panel, there is no cooling.

Which solar panel do I need for my van?

Placa Solar Camper 1

Polycrystalline panels are somewhat more expensive, although the differences have become quite diluted. Because of their construction characteristics, monocrystalline panels work better on cloudy days by trapping radiation, and polycrystalline panels work better on sunny days.

But what should really tell us which panel we have to mount will be the need for energy production that we have (and the space available). This will be determined depending on the devices that will consume energy and also the time we spend inside our camper.

We can go from a small or medium camper that does not even need to install a plate because with a second battery charged during the trip will cover the needs of a weekend to a family with children in a Large Volume with full bathroom (shower with hot water) and large fridge that will stay a week at the beach.

Ford Transit Custom Nugget Plus 2022 Prueba 001

Needless to say that if we mount a 100 W solar panel, we will never get those 100 W. Optimal yields are usually around 70% because we never capture all the radiation, the atmosphere is not clean all the time and the orientation of the plate on the roof is not the best. To this we must add the hours of sunlight per day, with extreme variations between a sunny day in summer and a rainy day in winter.


¿Buscas tu primera furgoneta camper? Aquí van seis opciones compactas, de la Citroën Berlingo a la Volkswagen Caddy

Assuming an approximate daily consumption for a large camper of 50 Ah between refrigerator, heating, water pumps, lighting, cell phone charger and the operation of an inverter to charge the laptop, if we are looking for the solar panel to be a support to extend the capacity stored in the second battery, a 100 W solar panel would be enough to generate between 15 and 40 Ah per day.

On the other hand, if we want energy self-sufficiency, we would have to install at least two 100 W or one 200 W solar panels, which would give us double the production.

How much does a solar panel for a camper van cost?

Placa Solar Camper

If we look at prices we have a very wide range in a relatively narrow price range (depending on the quality of the panel).

We have monocrystalline panels of 120 W from just over 70 euros, and from there on: monocrystalline 180 W for 135 euros to beasts of 370 W for just over 200 euros and intended for large motorhomes. The difference in polycrystalline is not too relevant, with little options such as 160 W panels for about 130 euros.

For flexible panels their price is somewhat higher starting from about 130 euros for a panel of 100 W, 200 euros for one of 120 W, and from there upwards.

ECO-WORTHY Panel Solar Flexible 130W 12V Módulo Monocristalino para Cargar Batería de 12V / Coche/Barco/Caravana

ECO-WORTHY Flexible Solar Panel 130W 12V Monocrystalline Module to Charge 12V Battery / Car / Boat / Caravan

We can also find complete kits to make the installation, including regulator, brackets, cable and even polymer to leave everything well fixed and sealed.

The regulators are in charge of converting the photovoltaic energy into charging pulses for the 12V batteries, and they can also be used to indicate the percentage of charge that we can distribute between the main battery and the secondary battery. Depending on the amperage supported and its type (MPPT, PWM) its price increases, being the most common the 10 and 20 Amperes.

Depending on the chosen option of kit material (board, regulator, control unit…) the prices range from about 170 euros to 300 euros for the most common combinations.

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