In Germany, for small PV systems on the building, one gets a modest feed-in tariff of currently effectively 8.2 euro cents per kWh. This decreases for larger systems. For commercial enterprises there is also the possibility of full feed-in - here the feed-in tariff is 13 euro cents per kWh or less for larger systems. The total investment can also be divided into a plant for self-consumption and one for feeding into the grid with higher remuneration.
The feed-in tariff is, of course, not high compared to the savings on electricity purchases (currently, even large commercial enterprises often pay well over 30 eurocents per kWh of electricity) or to the savings on gas purchases (e.g. 15 eurocents per kWh of gas). Therefore, it may be worthwhile to temporarily store the solar power in batteries, feed it into e-cars, or use it to heat your own heat storage unit using a heating rod.