If the powers out that means the grid is down... so you wont be able to send power back to them. If your using a gernerator to power your house nonstop it will cost a whole lot more then just paying for it from the power company. the price wont even compair it will be like 10-20x more a month with the gernerator.
Solar panals on the roof would be the way to go if you dont want a bill. but they tend to cost a few grand to set it all up 10-20 grand for a normal family home for a set up thats enough power for everyone in the house. But then you need to think of the money you save on the bills. But after its all paid for they last a long time. 20-30 years or so i have heard.
Wind turbine can be worth while as well if you live in a windy state and have enough land and no neighbors to bug you about it.
Water turbine if you have a stream flowing fast downhill on your property.
If it was up to me every building would have solar panals covering the whole roof. The whole idea that we still count on burning coal or nuclear energy to get power is just absurd.
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