I bought one of these earlier this year:
84Wh Portable Power Station Generator Kit with Solar Panel
It has died and won’t now take a charge at all - I’m wondering how to at least reuse the solar panel.
So I’m looking for help to change the cable to be USB output so that I could plug it into an ordinary battery pack. Any suggestions?
It turns out that to get the best out of a solar panel, you need a fairly smart circuit. MPPT seems to be the search term to use. (I think it’s true that a simpler approach can also work, but not quite so well.) It might also be true that this only applies for larger setups.