Il fabrique sa centrale solaire sans faire appel à un professionnel

Il fabrique sa centrale solaire sans faire appel à un professionnel

Self-built solar power plant by Audren Van Zalk in the Lot / Twitter @ObjectifZero

In a few days, this individual deployed a solar power plant on his own, which will cover more than half of his electricity needs. If the operation requires certain knowledge, building your own photovoltaic installation is a formidable economic solution. Testimony.

Who said that installing a solar power plant at home was a long and tedious process? In a small village in the Lot department, Audren Van Zalk has built her small photovoltaic farm in a handful of days.

“It took me a long weekend for the wooden structure and a weekend for the installation of the panels”explains this individual, who has been working in the construction sector for twenty years.

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Produce electricity to cope with rising prices

In his garden in the open field, he installed a photovoltaic power plant with a power of 3.2 kWp (restricted by the inverter to 3 kWp “to comply with the Enedis agreement”) self-consumption with free injection. The 8 panels of 400 Wc rest on a thick wooden structure, which he also designed and built himself. An approach that details in your accounts Twitter and youtube baptized “Zero Carbon Goal”.

“Since I was 15 years old I wanted to dedicate myself to renewable energies at home, but I lived in the city” explains the one who describes himself as a DIY enthusiast ». Faced with rising energy prices and to avoid “tariff ceiling [qui] will jump in 2024”decided to take on the technical challenge.

Installing your own power plant costs half

“I had some basic knowledge of electricity, but I had to review all the specific regulations for photovoltaics”, he explains. These past technical readings, Audren then orders for €2,200 of equipment (panels, 5 kW inverter and AC/DC boxes, shipping included), to which are added €250 for wood for the structure, €150 for grounding and one hundred euros for fittings, that is, €2,700 in total.

A rather small sum in view of the power of the plant. At €844/kWp For his ready-to-use photovoltaic installation, the handyman has made considerable savings, while a plant deployed by a professional costs between €1,500 and €3,000/kWp.

An electric car instead of a domestic battery

If you don’t consume it instantly, the solar electricity Audren produces is fed into the public grid for free. A choice that allows youavoid sometimes lengthy administrative procedures. To be paid for your surpluses, it is mandatory to have your installation approved by the Consuel and to comply with certain very strict technical conditions.

The installation, presented on the Twitter account @ObjectifZero

To optimize the profitability of its power plant, Lotois could have opted for a domestic battery. The latter allows energy to be stored for use on demand, day and night and whatever the weather.

The solution was not chosen for a good reason. “I didn’t put a battery on it because my electric car [une Renault Zoé 22 kWh, NDLR] absorbs a large part of the production he justifies. A battery would have doubled the price. of the installation that would have considerably increased the return on investment” explains on Twitter.

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Manual load disconnect pending automation

“I also have an electric water heater and I am in the process of installing an air-to-air heat pump” Audrey adds. The distribution of loads from the solar power plant to these devices is currently done manually, by means of connected outlets.

“When I know that the weather is going to be good, that I see a spike or that the inverter is sending too much to the grid, I shoot manually” he explains. However, he plansinstall load reducers in the future, which will allow these operations to be carried out automatically.

The Solar Power Plant Management Interface / Twitter @ObjectifZero

Go to the Southwest to adapt production to needs

Unlike most solar power plants, Audren’s does not face south. “I made the decision to head a little further west, because I need more power at night. Optimized for use », he says. This positioning makes it possible to boost production at the end of the day, by granting a prolongation of the power increase in the morning.

It expects to generate around 3,200 kWh of photovoltaic electricity each year. A production that will be consumed mainly by its Renault Zoé, which consumes 2,000 kWh per year. The balance, i.e. 1,200 kWh, could allow Audren and her small family meet at least half of your needs in electricity

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A profitable plant in just over 2 years

200 years old, its stone house with 90 m² of living space and its three occupants are heated with a wood stove and a heat pump reversible, which has recently replaced the radiators “toaster”. “At home everything is electric, I hardly use hydrocarbons anymore”, he brags

His electricity bill is currently €200 per month. By meeting 50% of her consumption, Audren could therefore save €1,200 every year. So your solar power plant should pay for itself in just… 2 years and 3 months.

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