Energy: operation, help, profit… What you need to know if you want to install solar panels

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As the energy crisis seems to be about to end, more and more French people are betting on photovoltaics to achieve some energy savings. But between the different types of solar panels and their profit, it is difficult to navigate. La Dépêche took the stock.

The photovoltaic sector is booming. According to a report by the think-tank Ember, an organization specializing in energy, 18 of the 27 EU member states recorded solar production records this summer, especially the Netherlands. (23% of its electricity mix), Germany (19%). and Spain (17%).

But while Emmanuel Macron on Monday called on the French “to be at the rendezvous of sobriety”, more and more households, worried about amortizing their energy bills, are installing solar panels on the roof of their house. Are you thinking of making the leap yourself? We explain everything you need to know.

How do solar panels work?

Simply put, solar panels take energy from the sun’s rays and convert it into electricity. There are two types of solar energy: thermal energy, which is used to supply a heating circuit and produce hot water, and photovoltaic energy, which is used to generate electricity, and to operate lights or different devices in your home.

Their principle is based on self-consumption: you use the electricity you produce, and in a way become your own energy supplier. But it is also possible that you inject part of the energy generated and even all the production into the public electricity grid.

What is power saving?

According to Engie’s data, photovoltaic electricity can save 200 to 600 euros per year. Although this number depends on the calibration course of your panels, you can expect to amortize up to “20% of your energy consumption”, explains Aurian de Maupeou, co-founder of Selectra, a company that specialist in comparing electricity offers. .

What benefits?

If it is possible to sell its energy to EDF, the calculation is now “no profit at all”, warns Aurian de Maupeou. “It is not very advantageous: if you consume your own energy, you pay 17.4 cents per kilowatt hour. If you sell it to EDF, it is 10 cents per kilowatt hour. The calculation is easily done”, continued the expert.

What help?

With these elements in mind, if you are thinking of taking the course yourself, know that you are indeed eligible for state aid. In fact, due to the environmental benefits offered by photovoltaic self-consumption, various aids can be offered to you.

First, you can take advantage of a photovoltaic self-consumption bonus. To do this, you need to install solar panels and use your own electricity production. The amount of the bonus decreases, and varies according to the power of your installation. It can range from 80 euros per kilowatt peak (or kWp) for the most powerful installations to 380 €/kWp for the weakest.

Second, you will benefit from a reduced VAT rate. In fact, “photovoltaic installations connected to the network with a power of less than or equal to 3 kWp can benefit from a VAT rate of 10%”, can we read on the website of the public service.

How much does it cost to install it?

According to the Hellowatt site, which specializes in optimizing energy bills, it requires an investment of between 9,000 and 23,000 euros for any installation between 3 and 9 kWp. But this price can vary according to various factors, such as power, technology used or brand. The geographical area you live in is also important, as it determines the level of sunlight that the panels can benefit from.

Very concretely, for a medium-sized house (112 m2) located in metropolitan France, it is necessary to calculate “between 9000 and 12,000 euros”, explained Kévin, adviser of CR2P, supplier of solar energy equipment.

Finally, note that solar panels are generally useful after 8 years. As for their life, it varies about 30 years on average.

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