I know there has been alot of questions before about battery backup, and tonight I set mine up before the first winter storm of the season.... My golf cart is directly underneath my pellet stove, so I drilled a hole and ran a cord to plug the stove in, I then re-wired the cart from 36V to 12V and installed the Harman 512H... The six 6V barrteries when fully charged will run my stove 10-12 hours