Backup systems are required for Off-Grid not really. By definition you do n't have the Power Company's power. Your stored energy is the first line of backup. That designed for only a 24-hour pounds. What do you do there after? If your solar, wind and magnetic power sources no longer work you will need a gas or 1000kw diesel generator generator. Because you energy storage, you just need to recharge the batteries and that will take a lot smaller mill. A 400-watt gas generator will cost $102 that has a 3,750-watt gas portable diesel generator price you $500. Recall the accessories these generators have an energy and maintenance cost as well as provide free energy.
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