I know a guy who lives in Canada pretty far north of the US border. He heats entirely with PV solar. He claims it's also way less expensive than other fossil

I know a guy who lives in Canada pretty far north of the US border. He heats entirely with PV solar. He claims it's also way less expensive than other fossil fuel heat. Basically PV solar cost has plummeted to the point that it is conceivable this sort of thing is possible. No need for a battery here as he pumps his electrons directly into concrete slabs which then radiate heat at night.