The US used to produce tons of solar panels, and LiFePO4 batteries too, but we let those industries fail. (I've been to quite a few plant auctions. It's sad, picking through the bones of random tools and support equipment, but nobody's bidding on the big crown-jewel machines because they had one purpose and that simply doesn't work in our market anymore.)

There are still a few solar panel plants in the US, but nothing like we had.