Very interested in this, as someone thinking about how to set up an off grid cabin here in Alaska. Last winter we hit a 112°F difference between inside our cabi

Very interested in this, as someone thinking about how to set up an off grid cabin here in Alaska. Last winter we hit a 112°F difference between inside our cabin at 72° and outside at -40°. This seems like a way to harness some of the heat drain while compensating for the accompanying darkness of the winter months that would drive less photovoltaic generation. I don't know much about solar alternatives so would love to know more from anyone who could suggest things...