Needs no extra power. Good stuff!
I’ve come up with a few good modifications for existing space and water heating systems (free designs by others), but it appears that the Mechanical Code (IMC, IBC, ASTM) favors manufacturers and is going to get in the way somewhat. It’s likely that many others are going to build the systems anyway. I wonder how many people have dumped insurance or are planning on doing so.
We are buying a plug and play off grid system from Wholesale Solar. For now we are just going to set it up and keep as back up for when the grid goes down. We are moving to our mountain retreat and putting all appliances on propane and then 2 one thousand gallon propane tanks. We figure we can go two years eithout a refill. Woodstove for heat. Hopefully that will be good enough. :-)