You seem to have misread my comment, or just didn't read the whole thing, because I mostly agree (except for the part about "land is free" - most of the solar c

You seem to have misread my comment, or just didn't read the whole thing, because I mostly agree (except for the part about "land is free" - most of the solar costs I've seen take into consideration full installation and financing costs). I said it was cheapest on a pure per kW basis. But exactly for these reasons e.g. the intermittent nature of it we can not currently go 100% solar without storage solutions, infrastructure improvements, etc. Point being it is those areas that will need to be solved (i.e. come down in price) and that marginal improvements in panel efficiency aren't the limiting factor in going to 100% renewables.