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I think that what’s not in this article, but needs to be, is that rooftop solar in the rest of the world costs about 1/4 what it does in the US. Getting US prices down to where they are elsewhere would do wonders for closing this big gap.
Yeah, adding a battery to the plan was totally cost-prohibitive for my parents when they were getting started, but I’d assume those costs have come down a good amount. It’ll still probably be a big expense, but the math might work out better these days.