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One Insight battery at 936 amp hours has about the same capacity as a single large deep cycle battery. Only the Insight battery runs at 144 volts with 6.5ah, instead of 12 volts with 80ah. Which also makes it very dangerous to be used to used in a table. It'll kill you, while a 12 volt battery won't, and a dozen 12 volt batteries strung up as 12 volts and 1,000ah might just give you a nasty shock.
There is no real cost savings benefit. The same price in deep cycle lead acid batteries will give you 10x or more useable capacity. And it would be easier to find a (grid tie inverter?) in 12, 24, or 48 volts.
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I try to be helpful. I'm not an expert.
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