Suggestions for using "wasted" solar power?

This is an expensive idea but might fit your uses. Buy a few so called solar batteries and swap them out to be used other places on a regular bases. I have 4kw of those batteries for use during short power outages at home. I just charge them from the wall but if I had a motor home with a bunch of solar sitting in the back yard I would store them there and swap them into the shop to use the power. My process now for longer power outages is to charge them with a generator so I don't have the generator running all the time. I have thought abut picking up some solar panels to recharge them but they are still on the maybe list.