I dunno if this is what gp meant to say but didn't convey properly, but the average per year is pretty irrelevant once you leave the subtropics. You need enough

I dunno if this is what gp meant to say but didn't convey properly, but the average per year is pretty irrelevant once you leave the subtropics. You need enough power for the lowest level of light part of the year, which is also the highest total energy use part of the year (much of that is achieved through individual home heating with burning fuel, but electrification is necessary to have any hope of even stalling climate trends).