> But that's not an argument against PV solar... It can certainly be an argument against residential rooftop solar. In general, "industrial solar" (ground mou

> But that's not an argument against PV solar... It can certainly be an argument against residential rooftop solar. In general, "industrial solar" (ground mount, high voltage strings, single axis trackers) is sub-$1/W installed. Residential rooftop solar is still $2.50-$4/W depending on where you are, because it has quite a few additional requirements (per-panel rapid shutdown in NEC 2017, various other requirements on the panel and interconnects that add cost), and, often, poor siting from partial shading reasons (chimneys, vent stacks, trees, other bits of roof, etc). I don't mind making homes more suited to solar (oversize the main busbar with a "solar ready" panel, route conduit up to the roof, require all vent stacks be on the north side of the roof), but it's a rather uncontrolled solution that's of limited "actually solving the problem" use. Low levels of penetration are easy to deal with, higher levels start to get really hard, when you've got whole subdivisions shifting from "lots of production" to "lots of consumption" as clouds go over. Or, we get used to less reliable, more intermittent energy again, and a lot of the problems go away. Just, that generates other problems. The power grid is a lot more fragile than most people assume.