> The alternative would be to have totally separated panels, but many opt in to selling excess back, since it gets more and more profitable as prices go up. AF

> The alternative would be to have totally separated panels, but many opt in to selling excess back, since it gets more and more profitable as prices go up. AFAIK the latter part is now less and less true in Germany because the price for selling excess back is only a fraction of the cost of getting power out of the grid, so people are installing batteries, heat storage and controllers that switch heavy consumers like their heat pump according to other loads in their house.