Note that some of the "generated revenue" is not from selling the generated power but from selling Renewable Energy Credits, which allow power companies to clai

Note that some of the "generated revenue" is not from selling the generated power but from selling Renewable Energy Credits, which allow power companies to claim your solar as part of their energy generation mix. So it might not be economical purely on a power generation basis, the government is giving renewables a boost with energy portfolio requirements. No idea if France has a similar system in place. https://www.epa.gov/green-power-markets/renewable-energy-certificates-recs https://www.epa.gov/green-power-markets/renewable-energy-cer...