Comment on Transparent solar cell technology could allow smartphones and cars to self-charge
Thorry84@feddit.nl 1 month ago
Did a simple calculation to see how long it would take for such a tiny solar panel to charge the phone. And that’s not using the phone (turned off) and without concern for overheating the phone by putting it in direct sunlight. The efficiency of regular solar panels are bad, this transparent thing is cool but way worse than regular panels. In an optimized scenario (not realistic) it would take 60 hours for a full charge. Since there aren’t usually 24 hours of sunlight (let alone full direct sunlight) it would probably take a week to charge.
Self charging phones using solar isn’t a thing that’s practically possible.
Even at high efficiency (which isn’t possible) it isn’t practical since phones don’t do well in the sun and are usually stored in pockets, bags and often have covers over them. Plus they are mostly used inside where there isn’t sun, or outside where most of the times there also isn’t a lot of sun.
Just put a solar panel on the roof, that’s the best place for solar panels.
There was a very simple phone from Samsung a few years back that had a solar cell on the back.
Since the battery lasted over a week anyway, you could easily double the battery life by just having it in indirect light.
Modern phones are guzzling so much power that it’s hardly useful there.
You could look at it another way- a solar power screen on a phone won’t charge it all the way, but as a secondary source of power that is essentially always on when the sun is up or other light sources are on, it reduces the battery drain over the day, meaning less charging needed at night.
Great points.
cmnybo@discuss.tchncs.de 1 month ago
Solar panels on your roof won’t do much good if you’re off grid and need to charge your phone. Just get a small, folding solar panel that you can carry in your backpack. A 10W panel will only need a couple hours of direct sunlight to fully charge a phone.
ulterno@lemmy.kde.social 1 month ago
Even having a panel covering your backpack would be a good idea.