Comment on Solar powered personal umbrella with battery?
solrize@lemmy.ml 3 days ago
There are foldable and flexible solar panels that go on a backpack. An umbrella would be kind of silly. What are you trying to do? How much power do you need?
Here is a 6.5 watt solar backpack though I robably wouldn’t buy it. It shoud be able to charge a 40WH USB power bank in a day or so. You never get the full rated power from solar cells.
Ilovethebomb@sh.itjust.works 1 day ago
That would be effectively worthless if it was used as displayed, with the panel on the backpack. Solar panels perform best when directly facing the sun, as soon as you start to angle them away, they lose output.
I’ve had reasonable results with leaving them on the ground all day though.