[tuatoru]

All of those things happen the same, and cost the same amount, whether 10 kWh are produced or 11 kWh. The marginal cost of the last kWh is zero for these items.

There is thermal wear on the power management and voltage step-up electronics, but it is small unless design parameters are exceeded in going to 11. So maybe those components would have to be replaced ten milliseconds earlier than otherwise.