Tesla’s (
tesla.com)
Powerwall 2 is a solar battery that can be floor or wall mounted, and is suitable for installation both indoors and out. Multiple batteries can be used in tandem to suit households with a high-power demand. It also features an internal inverter to simplify installation
If asked whether it’s possible to build a completely off-grid home, for the vast majority of self builders, the answer to the question will be no. Okay, perhaps that’s a bit harsh. There are some ways around the problem, depending on where you live and what sort of plot you own, but we’ll come back to this later in the article. It might instead be possible to build a home which has zero (or almost zero) energy bills – noting that this is a slightly different question.
Space heating & other power needs