#20636
Whirlibird
Whirlibird
Survivalist
member10

Aha, there is the difference, you are both talking about PV systems.

Whereas I was referring to passive heat exchange systems.

I have set up a number of passive systems over the years, some as part of houses, one as the “power” for a dehydrator, and add on systems to help heat a house cheaply.

Both have their uses, but one literally costs nothing to ‘run’ once its set up.