thingan has it right. The contract is worded as if too good to be true. And so the admins go sure why not, next to free and solves our problem. It is not unlike the deal I just got offered from base here in austin. It sounds good, we'll put a giant battery on your property that you can use in a blackout. What they don't say is they'll discharge that sucker down to as little as I think 6KWH from its capacity of 40 if they can make money from it. So when you likely need it most, it could be nearly exhausted, giving you no benefit. But they don't hilite that. Worse, you've given them an easement, so now they have the right to come onto your property whenevr the thing needs service. And don't even think about selling your house without disclosing the 20 year lease. But on the surface, looks like a great deal. 13 grand battery for 695 + 20/mo.