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Originally Posted by #^&#^&#^&#^&#^&#^&#^&#^&#^&#^&#^&
I understand these can be moved after 10 years...
What if I decide in 5 years to cut National Grid out and add additional panels...am I required to continue to pay national grid?
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Not sure what you mean by 10 yrs, the array can be disassembled/reassembled like an erector set anytime, like if a roof needs replacing, but of course it will cost you extra to do so.
Unless you install batteries to store the overproduced electricity during the day to use at night, you will always need a 2nd party electric provider, Nat Grid or otherwise. The batteries will cost you a fortune (likely more $$ than the PV array). BTW: in a grid connected system, if the provider looses power due to a storm: you don't make your own electricity! The DC/AC inverter has to sense power from the street. Again it is an issue of having a battery system to absorb excess power produced.