Redundancy in all supply chains! This includes energy. Used car batteries are pretty cheap and can be wired in series to get 120/240v with an DC to AC inverter. Even if you keep them charged them with grid power, a little investment in redundancy can be cheap insurance.
Redundancy in all supply chains! This includes energy. Used car batteries are pretty cheap and can be wired in series to get 120/240v with an DC to AC inverter. Even if you keep them charged them with grid power, a little investment in redundancy can be cheap insurance.