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# I use some of the electricity generated by my installation and sell the surplus: which scheme applies?

First, you need to determine whether the operation of the system is of a commercial, industrial, mining or craft nature, i.e. whether it is designed to generate a profit in the medium term. If this is the case, the treatment follows that applicable to a mixed domestic/business use, depending on the proportion of business consumption.

If you are an individual with a system with a capacity of 30 kWp or less (10 kWp for 2021–2022), the administrative exemption applies: the system is generally not considered to be for commercial purposes and is therefore not eligible for the investment tax credit.