What is a solar microinverter and how does it work?

The microinverter is responsible for converting the energy produced by the solar panels from direct current to alternating current so that you can use the energy generated as electricity for your home.

The<a href="https://quierosol.com/en/solar-panels"> solar panel</a> with the integrated microinverter absorbs solar radiation and processes it into electrical energy. However, it enters in direct current format and is not compatible with domestic electrical circuits; it must be converted to alternating current. That is the part where the microinverter gets to work.

In turn, the inverters of a photovoltaic installation are prepared to support a maximum amount of current; it is not the same to have a central inverter that can manage a peak amount of kW (the one that the installation must support according to each consumption pattern), than to have several inverters, one per panel; this implies the possibility of being able, or not, to extend the same installation in the future. 

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How do microinverters improve the efficiency of solar panels?

The benefit of solar panel systems with microinverters lies in the fact that if any part of the panel is obstructed or shaded, only that part of the panel loses efficiency, allowing the rest of the panel to continue to function properly.

In a central inverter installation, if one panel is partially blocked, the entire panel loses efficiency and a significant portion of the energy production is lost. Whereas in an installation of solar panels with microinverters, only the blocked part of the panel will lose efficiency.

When should microinverters be used in solar panels?

Solar energy systems with microinverters are highly recommended for roofs where there are many obstacles, nearby buildings, chimneys, trees, etc., that cast various shadows on the panels.

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What are the costs associated with the installation of a solar energy system with microinverters?

Solar energy solutions with microinverters slightly increase the price of an installation due to the fact that we are talking about slightly more technically complex materials. 

The panels of the installation are the same, but the price and number of inverters required vary according to each case and each installation. 

For example; a central inverter can cost around 500-600€, plus VAT. While microinverter technology for solar panels costs approximately €130 per panel. The cost overrun will be entirely associated with the number of panels in the installation.

What considerations should be taken into account when installing a solar energy system with microinverters?

NONE! The operation of the installation will be the same as in an installation with a central inverter.

We could take into account the fact that it will be a much more efficient installation than a standard installation on a roof with many shadows or obstacles. 

We should also take into account that this technology is a bit more expensive; especially when the size of the installation already exceeds a certain number of panels. 

What is the difference between microinverters and central inverters in solar energy systems?

The main difference between installing solar panels with microinverters for the home or an installation with a central inverter is the efficiency and performance of the installation itself. 

If there is no shadow or obstacle, central inverter installations are exactly as efficient and profitable as a solar panel installation with microinverters; they are even a little more economical.

The difference to know what is more advisable to install lies in the location of the installation, which will always be subject to technical recommendations and the amount of blockages that could receive the path of light (and radiation) throughout the day. If you want to learn more about which type of panels are more suitable for your home, do not hesitate to visit our page on <a href="https://quierosol.com/en/solar-panels">solar panels</a> and our article on the difference between the main panels: <a href="https://quierosol.com/en/blog/monocrystalline-vs-polycrystalline-solar-panel-which-to-choose">monocrystalline vs. polycrystalline. </a>

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If you have any questions after reading this article, do not hesitate to contact us. At <a href="https://quierosol.com/en/dedicated-solar-expert-for-expats">Quiero Sol </a>we provide advice to help you review your particular situation and answer any questions you may have. In addition, we invite you to discover the latest topics and articles about solar energy in our <a href="https://quierosol.com/en/blog">blog.</a>

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¿Qué son las Placas Solares con Microinversor?

 Què són les Plaques Solars amb microinversor?

What are Solar Panels with Microinverter?

The use of solar panels is gaining popularity as a source of <a href="https://quierosol.com/en/blog/fossil-fuels-and-renewable-energies">renewable and clean energy</a> in Spain. However, there are certain environmental factors that can affect its efficiency, such as the presence of dust or haze. In this article, we discuss how these factors can influence PV modules and suggest measures to avoid and fix these drawbacks.

The haze is a meteorological phenomenon that occurs when dust and sand particles rise in the atmosphere, which are transported by the winds towards lower areas. It is common in Spain and can have a significant effect on the generation of solar energy.

Dirt and dust can settle on the surface of solar panels, creating a dull layer that reduces the flow of sunlight hitting them. All this can significantly reduce the energy efficiency of solar panels and decrease their productive capacity, since they are in charge of collecting energy.

How to prevent the accumulation of dust and haze on solar panels?

Various measures can be taken to prevent this. First of all, it is essential to keep the panels clear and free of debris. To avoid dust accumulation, it is suggested to clean them regularly with a soft cloth and water.

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Another preventive measure is to place the solar panels in an inclined position so that the rain can naturally clean them. Likewise, it is advisable to install a monitoring system that allows detecting the accumulation of dust and dirt on the solar panels and to schedule regular cleaning accordingly.

What to do if there is already accumulation of dust and haze on the solar panels?

If they have already accumulated dust and dirt, it is crucial that you clean the solar panels as soon as possible to restore their optimal performance. An expert can be hired to avoid any damage, but as we have told you in <a href="https://quierosol.com/en/blog/cleaning-of-solar-panels">our article on cleaning</a>, you can also do it. In addition, it is essential to check if the dirt has generated any type of damage and replace them if necessary.

In short, sand and dust can have a significant effect on solar power generation in Spain. However, through the implementation of preventive measures and periodic cleaning of photovoltaic installations, their efficiency can be preserved and the use of this renewable energy source can be increased.

Limpieza de placas para garantizar óptimo rendimiento

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At Quiero Sol, in addition to helping you to <a href="https://quierosol.com/en">compare installers and budgets</a>, we want you to understand the concepts of solar energy, photovoltaic self-consumption and the different factors that determine a good performance of a solar system. For this reason, so that you continue deepening concepts, we recommend reading this article with <a href="https://quierosol.com/en/blog/5-tips-for-the-maintenance-of-solar-panels">5 tips for the maintenance of photovoltaic panels</a> and thus guarantee the maximum productivity of your installation. 🌞

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Calima y polvo en las placas: cómo afectan y qué hacer

Calima i pols a les plaques solars: com afecten i què fer

Dunst und Staub auf Solarmodulen

Smuts och damm på solpaneler

Haze and dust on solar panels: how they affect and what to do

We have been talking a lot about photovoltaic energy, so today we ask you, do you know what aerothermal energy is and what are the advantages of combining it with solar panels?

In this article, we will see what it means to combine aerothermal energy with photovoltaic energy, why it is advantageous and how to apply it to a home to obtain greater performance and achieve a high level of self-consumption.

First, how does an aerothermal heat pump work?

It is an air-water technology in which a heat pump feeds an exchanger that cools or heats an air current driven by fans.

Aerothermal heat pumps capture free energy from the environment and transform it into useful energy for the home in the form of sanitary hot water, heating and cooling (if it has a reverse cycle).

Heat pumps are the most efficient system that exists today to heat or cool a home, since with a single piece of equipment the energy needs of the home are covered and at a low cost. This is thanks to its operation and efficiency.

It has a very high efficiency: it has a COP (Coefficient Of Performance) greater than 4. This means that for every kW of electrical power it consumes, it is capable of supplying 4 kW of thermal power.

How does aerothermal work with radiators?

Through the energy of the air, the aerothermal pump manages to heat or cool the water of the hydraulic installation (hot or cold water generator) and emits that temperature into the environment.

Why today is photovoltaic with aerothermal energy more imposed than solar thermal? Which heating system works best with solar energy?

Currently, the installation of photovoltaic solar panels is more advantageous than thermal ones, when combined with aerothermal energy. Why?

A great advantage is that 75% of the energy required by aerothermal energy is free from the air, and the remaining 25% of energy is needed for the heat pump to work. If we produce that 25% of energy through renewable sources such as photovoltaics, it is a great possible combination. This translates into 100% clean energy.

Following the COP concept seen above, for every electrical kW produced by the solar panels, the aerothermal machine will transform it into 4 thermal kW for the home.

In this way, the circle of renewability and energy efficiency is closed, where the thermal needs and demands of the home are covered.🏡

That's all for today! We hope we have resolved your concerns about the combination of aerothermal energy with photovoltaics and its benefits.💪

If you are thinking of switching to solar self-consumption, from <a href="https://quierosol.com/en">Quiero Sol</a> we will connect you with installation companies and you will be able to find information such as prices, delivery times and guarantees, among others.

By simply entering your monthly electricity consumption and zip code, you will receive the necessary <a href="https://quierosol.com/en">information from all the installers</a> in your area so that you can compare and make the best decision for your installation. 😎

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Ventajas de combinar aerotermia con placas solares para autoconsumo

Avantatges de combinar aerotèrmia amb plaques solars

Vorteile der Kombination von Luftwärme und Sonnenkollektoren

Fördelar med att kombinera aerotermisk energi med solpaneler

Photovoltaic and aerothermal

In Spain, photovoltaic solar self-consumption is an increasingly chosen alternative to reduce dependence on the conventional grid and contribute to the energy transition towards <a href="https://quierosol.com/en/blog/fossil-fuels-and-renewable-energies">renewable energy sources.</a>

With this, a provision that has been implemented to encourage self-consumption is the so-called surplus compensation, which allows users who produce more energy than they consume to sell it to the electricity grid and receive financial compensation for it. <a href="https://www.boe.es/buscar/doc.php?id=BOE-A-2019-5089">Royal Decree 244/2019</a> in Spain establishes the regulatory framework for self-consumption with surpluses. According to this decree, those who have self-consumption facilities of up to 100 kW can take advantage of the measure, as long as they meet certain technical and administrative requirements.

When the generation of solar energy is greater than the energy used in the home, the excess energy is turned into the electrical network and the owners are financially compensated. This measure allows users to make their <a href="https://quierosol.com/en/solar-panels/installation">solar panel installation</a> profitable, while contributing to the generation of renewable energy in the electrical system. In addition, self-consumption with surplus compensation also promotes energy efficiency and the reduction of greenhouse gas emissions.

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Solar rates with compensation for self-consumption surpluses

The owners can take advantage of the compensation mechanism through the simplified modality or by contracting a specific surplus compensation contract.

In both cases, the user can reduce their electricity bill and, in some cases, even generate additional income by selling the excess energy, saving money as a result.

Having a photovoltaic installation is an excellent option to reduce the costs of conventional electricity consumption while contributing to the transition towards a more sustainable energy model.

The concept of simplified compensation is the mechanism most used by users of photovoltaic solar self-consumption in Spain. In this, the excess energy that is produced is poured directly into the conventional electrical network and is deducted from the household electricity bill.

In this way, the need for electrical energy that is used from the electric company is reduced. Electricity fed into the network is valued at the average wholesale market price at the time it is produced and is deducted from the home's electricity consumption at the same time.

Hiring a contract with the retailer is another option for users of photovoltaic self-consumption in Spain. In this case, users and the electricity company agree on a price per kilowatt hour (kWh) of solar energy that is poured into the network.

In this way, the excess energy produced is poured into the network and is financially compensated at the price agreed with said company.

Which company pays the best for self-consumption surpluses?

Most of the electricity companies in Spain have special compensation agreements for users of self-consumption systems. The value per kilowatt hour of energy produced and sent to the network depends on the company and the selected rate, however we can say that the price of the surplus changes every hour and is approximately 0.05 - 0.06 €/kWh. The best rate for compensation is that of the regulated market or PVPC.

Therefore, it is necessary to compare the different alternatives available in the market to determine which company offers the best compensation for selling the energy.

In general, the term is usually one to three months from the billing date on which the surplus was recorded (that is, the energy that you have not consumed). Even so, it is important to bear in mind that this period may vary depending on the marketing company with which the service is contracted and the number of procedures to be carried out.

Therefore, it is important to find out in advance about the conditions for the sale of energy and the return of surpluses, as well as the terms and requirements necessary to receive the corresponding compensation.

In conclusion, photovoltaic solar self-consumption with surplus compensation is a great alternative to promote the generation of renewable energy in Spain. However, it is necessary to continue working on removing barriers and promoting measures that promote self-consumption and the energy transition towards a more sustainable and efficient system.

Therefore, if you also want to contribute your bit in the transition towards clean energy for a healthy and habitable planet for future generations, from Quiero Sol we help you to <a href="https://quierosol.com/en/solar-guide">understand the concepts</a> of solar energy, photovoltaic self-consumption, and also to <a href="https://quierosol.com/en">get instant quotes</a> so you can compare before buying your solar products or hiring an installation company. <a href="https://quierosol.com/en/contact">Contact</a> us if you have questions!

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Compensación de excedentes: ¿qué es y cómo funciona?

Compensació d'excedents: què és i com funciona?

Überschussausgleich: Was ist das und wie funktioniert er?

Överskottsersättning: vad är det och hur fungerar det?

Surplus compensation: what is it and how does it work?

Promised is debt! After talking about <a href="https://quierosol.com/en/blog/5-tips-for-the-maintenance-of-solar-panels">solar panel maintenance</a>, today we are going to share with you how to clean them, their importance to maximize efficiency and energy production, and how to use a solar panel cleaning kit to save money on your electricity bill. .

Next, we answer the main questions that those who have self-consumption systems have, about the maintenance of solar panels and the washing of photovoltaic modules.

What to take into account when using a module cleaning system? You could assess about the advantages of investing in a solar panel cleaning brush for your self-consumption installation and/or keep up to date with the innovative cleaning solutions for Karcher solar panels. With this you will achieve a good regular maintenance of the solar panels and a reduction of the electricity bill thanks to it.

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Over time, it is normal for a layer of dirt to accumulate on the surface of the panel. This is a consequence of airborne dust, bird droppings, pollen from flowers, tree leaves and other particles. All of this can decrease the power of solar panels and even lead to hot spots.

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To generate energy, photovoltaic panels must be exposed to sunlight. For this reason, they are also subjected to unfavorable weather conditions and have to withstand the elements. Unless you live in an area with significant levels of pollution, dirt, sand or snow, it is not necessary to clean your solar panels frequently. In most cases, rain is enough, although if you are in coastal or highly polluted areas it might be beneficial to periodically spray the modules.

When cleaning, it is essential to take into account that the surface of the panel (glass) should not be scratched or damaged, as this can considerably reduce its performance.

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The ideal method to do this is to use lukewarm water and carefully. Try to use only water, without chemicals or abrasives. It is not recommended to use these harsh cleaning products as they can damage or even scratch the glass. Therefore, to remove dirt, it is advisable to use something that does not push or scratch the panels, such as a window cleaner.

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The use of drones is on the rise and outdoor activities such as cleaning can benefit from this advanced technology. At the moment, only a few engineers use them for facility maintenance activities. However, little by little the designs will adapt to the cleaning of the crystals.

How many times are the solar panels cleaned? How often do you have to clean the solar panels?

Para planTo consider cleaning photovoltaic solar panels, the initial step is to assess the amount of dirt they may have. To assess this there are at least two options:

Is it necessary to hire a solar panel cleaning service? How much do you charge to clean solar panels?

Good cleaning and maintenance -and the complexity of the task- depends on the type of photovoltaic installation. We have observed in this article that doing the cleaning ourselves, with the help of an assistant, is not a difficult task. Of course, IT IS VERY IMPORTANT to adopt all the necessary security measures to access your solar panels.

However, in the event that the solar installation is located in a place that is difficult to access or you have doubts about carrying out work on a roof, it is better to avoid possible dangers. For this, there are services that are responsible for cleaning and maintaining the solar panels, with the essential security guarantees, and with their prices depending on the company and the installation.

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If you already have a solar panel system in your home, we hope this article has been useful to you. If this is not your case and you are considering installing <a href="https://quierosol.com/en/solar-panels">solar panels</a> or <a href="https://quierosol.com/en/batteries">batteries</a> for your home or business, we help you compare before buying solar products and obtain quotes from installers quickly and easily <a href="https://quierosol.com/en">here</a>. 😎

At Quiero Sol we help you to compare installers, but also to understand the concepts of solar energy, photovoltaic self-consumption and the different factors that determine a good performance of a solar system, such as good maintenance and cleaning to guarantee the maximum performance of solar panels, as in the case today. 🌞

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Limpieza de las placas solares

Neteja de les plaques solars

Reinigung von Sonnenkollektoren

Rengöring av solpaneler

Cleaning of solar panels

We know very well that installing solar panels in your home (or business) can be a significant investment. But we cannot ignore that these photovoltaic modules allow us to save between 60% and 70% on the electricity bill and that their useful life is usually around 25 to 30 years, depending on how they are treated, their use and its maintenance (the topic of today's article!).

And why is it important to maintain the panels? Well, on the one hand, it will help you improve the production of clean energy and thus increase savings on your electricity bill. On the other hand, to extend the useful life of the solar panels and thus increase the performance of the photovoltaic installation.

In today's article, we tell you everything you need to know about the maintenance that a panel requires, what is the price of maintenance for the panels, along with some tips for its maintenance.

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Although solar panels are durable and very resistant, they are installed outdoors (rooftops or on the ground) and are exposed to inclement weather that can damage the surface, among other things.

Apart from cleaning, the type of maintenance of solar panels involves other actions to take into consideration, such as checking that there is no structural damage to the surface of the panels such as: cracks, breaks or other visible inconveniences.

All this is recommended to be done with the very purpose of achieving greater photovoltaic production in solar systems, and therefore, greater profitability.

Although solar panels do not have moving parts that wear out, some problems can arise, such as deterioration in cables, conduits, insulation and other components of the installation.

It doesn't hurt to also be attentive to animals that may be chewing cables, damage from natural disasters (earthquakes, forest fires or storms) and damage or corrosion from home renovations.

Can I do the maintenance of the solar panels or is it necessary to hire a company?

And here we return to the topic at the beginning of this blog: the initial investment. Nobody invests part of their capital and then does not follow up on the status of what they have allocated their money to, right? Be it an installation of solar panels, a vehicle, a drone or an appliance.

Therefore, having a professional review the system can mean identifying a defect before it becomes a bigger problem. For example, checking the panels, the cables, the connections, the assembly and the inverter, among others.

How much does the maintenance of a solar panel cost? What is the maintenance cost of solar panels?

The price of solar panel maintenance will depend on the rates with which the company or self-employed professional works, as well as the materials or components of the installation that must be replaced.

What care and maintenance must be taken for the solar installation?

5 Tips for the maintenance of solar panels

Carrying out regular, periodic and preventive maintenance is very important to ensure optimal performance of the installation and take advantage of the increased energy production of photovoltaic modules.

These 5 tips may help you to obtain proper maintenance:

1. Visually inspect the installation, if there are broken or damaged solar panels, deteriorated cables, accumulated dirt or dust.

2. Clean with water and a soft cloth, without abrasive or chemical products. Do not miss more information about cleaning solar panels in this article that we have made for you.

3. Check that the panels are correctly tilted and oriented.

4. Make sure that the electrical connections are safe and there is no risk of shock.

5. Make sure that the temperature of the panels is not too high, as it could reduce the power and performance of the solar system, as we have seen in our blog about the effect of <a href="https://quierosol.com/en/blog/loss-of-power-and-performance-of-solar-panels-due-to-the-effect-of-temperature">temperature</a>.

At Quiero Sol we help you to compare installers, but also to understand the concepts of photovoltaic self-consumption and the different factors that determine a good performance of a solar system, such as maintenance to guarantee maximum productivity, in the case of today .🌞

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5 Consejos para el mantenimiento de las placas solares

5 Consells per al manteniment de les plaques solars

5 Tipps für die Wartung von Solarmodulen

5 tips för underhåll av solpaneler

Blog index: How many solar panels do I need to/for…?🤔

1. How many solar panels do I need to charge an electric car?

The most appropriate answer will depend on factors such as the contracted power and the charging speed, the geographical location of the photovoltaic installation, and above all knowing how much electricity is necessary for the car to circulate.

In the same way that for gasoline cars the measurement of liters per 100 km is the amount of fuel that it will consume on average to travel 100 km, electric vehicles also have a similar measurement: kWh per km. This varies between electric cars, but on average most electric cars will get around 6 km of range with 1 kWh of electricity in their battery pack.

As we've mentioned, the number of miles an electric car can drive per kilowatt-hour of stored electricity varies. Some examples in descending order are:

🚘🔌Mitsubishi i-MiEV: 6.3 kilometers

On average in Spain around 12,000 km per year (32 km per day) are driven. So if we get 5 km of range for every kWh of charging in the car, it will use almost 8 kWh per day.

It is likely that you already know approximately how many kilometers you drive per year, so we recommend that you base your estimates on that figure and not on the average and example that we are giving.

So, for example, if we have an electric car with a 50 kWh battery that gives us a range of 340 km, and we drive 10,000 km a year, we will consume 1,470 kWh of energy per year (10,000 km x 50 kWh / 340 km), so it will be necessary to install 4 solar panels capable of producing 370 kWh annually each.

2. How many solar panels do I need for a 200m2 house?

In a 200m2 house with four people and an approximate annual consumption of 3,000 kWh, panels that produce those 3,000 kWh of energy will be needed.

Considering that a panel produces an estimate of 730 kWh per year, if we take as an example a 400 W solar panel that receives an annual average of 5 hours of sun per day (an average that compensates the hours of less sun in winter with those of more summer sun).

The solar panel generates 400 W for each hour of Sun, and the calculation to know how much energy it produces would be: 400 W x 5 hours of Sun per day = 2,000 Wh, which is equal to 2 kWh per day. Therefore, 2 kWh per day x 365 days of the year = 730 kWh per year.

The next calculation is to divide those 3,000 kWh per year by what can generate one panel per year (730 kWh) and discover that a house of 200m2 and 4 people could get by with 5 solar panels (3,000 kWh / 730 kWh = 4.1 panels).

However, we want to emphasize that each case (and each household) is very different in its consumption habits, the amount of annual consumption, the orientation and geographical location, and the annual hours of sunshine it receives.🏡

3. How many solar panels do I need for 10,000 W? (10 kW)

4. How many solar panels do I need for 5,000 W? (5 kW)

5. How many solar panels do I need for 3,000 W? (3 kW)

As we have seen in detail in our <a href="https://quierosol.com/en/solar-guide">Solar Guide</a>, solar systems are sized in kilowatts (kW), that is, by how much electrical power they produce.

For example, a home with 12 solar panels installed on its roof and where each panel is 450 watts (W), the power of the photovoltaic system will be 5.4 kWp:

12 panels x 450 W = 5,400 W = 5.4 kWp considering that 1 kW is equal to 1,000 W

Therefore, we can say that this installation is a 5.4 kWp solar system (peak kilowatts of production in its best conditions). Avoid the temptation (and confusion really) to think that this system will produce 5.4 kW all day, ⚠️ since it will produce this at noon on a perfect sunny day (clear and sunny skies but not too hot).

⚡For 10 kW or 10,000 W = 22 panels of 450 W

⚡For 5 kW or 5,000 W = 11 panels of 450 W

⚡For 3 kW or 3,000 W = 7 panels of 450 W

6. How many solar panels do I need for a refrigerator?

Self-consumption

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Cleaning of solar panels

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5 Tips for the maintenance of solar panels

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