Look me up if you decide to go for it. I'm part of a start up that makes solar storage batteries from used EV batteries. They cost about half as much as similar commercial products, and perform better. We also sell used and 'decommissioned' panels from commercial solar arrays, which have higher output in low light situations than the homeowner and hobbyist grade panels on the market. Depending on what you're looking to build, we could easily save you thousands of $.