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The good thing is: They can power air conditioning systems for free when you most need them, and the grid is at risk to fail. Pakistan had a rapid buildout of such home systems for this very resason.
The stuff North Koreans and Germans have been doing for years, oddly enough.
And Americans. I swapped out some lead 200Ah batteries at home yesterday for 280Ah LiFePO batteries which cost me half of what the lead-gel batteries did 5 years ago. And the lead ones started to die already


