Hi all,
I'm cycling around the world and recently bought a cheapo 20v 10W solar panel on aliexpress. On paper it looked ideal - lightweight with no glass, but the epoxy top scratches easily. I noticed when I first got it that hiding even one of the 72 segments would cause the power output to seriously drop. Hiding three would drop the output below 5v. Having this solar panel on the back of the bike doesn't work as the odd shadow causes it to fail.
http://www.aliexpress.com/item/10W-...RV-Boat-Marine-Car-Solar-Kits/1572472842.html
At the moment I've got it wired to a switch-mode 5v regulator. If I'm lucky I can get 500mA at 5v when I should be getting 2A. I believe this is due to the panel being slightly scuffed on top.
Am I right in saying this is due to high resistance? It looks like I can probably rewire the panel to have the four large strips in parallel but even then this may not be enough.
Or should I give up and get one with a glass top?
Cheers,
Andrew
I'm cycling around the world and recently bought a cheapo 20v 10W solar panel on aliexpress. On paper it looked ideal - lightweight with no glass, but the epoxy top scratches easily. I noticed when I first got it that hiding even one of the 72 segments would cause the power output to seriously drop. Hiding three would drop the output below 5v. Having this solar panel on the back of the bike doesn't work as the odd shadow causes it to fail.
http://www.aliexpress.com/item/10W-...RV-Boat-Marine-Car-Solar-Kits/1572472842.html
At the moment I've got it wired to a switch-mode 5v regulator. If I'm lucky I can get 500mA at 5v when I should be getting 2A. I believe this is due to the panel being slightly scuffed on top.
Am I right in saying this is due to high resistance? It looks like I can probably rewire the panel to have the four large strips in parallel but even then this may not be enough.
Or should I give up and get one with a glass top?
Cheers,
Andrew