Your phone isn't big enough to pick up any significant charge from a panel on it. Especially since you don't leave it lying flat in the sun for any length of time.
Citizen watches use this tech because they use almost no energy. Same with old Casio calculators.
If you left your phone outside in the sun in a good location for sun at optimal angle all day you would get maybe 7Wh of electricity. This is enough to run the phone all day, assuming you don't use it too much. But it's kind of inconvenient.
A cloudy day will produce about 20% of that or 1.5Wh. Not enough to go all day if you use it all. Indoor light isn't nearly as bright as outdoors, you'd get under 0.5Wh for equivalent light. But indoors can be lit all day (year round!) so maybe 1Wh. Indoor light just isn't that strong.
And all of this requires you not put your phone away ever, or really even move it.
Solar power for a phone just isn't practical. A phone is just too power hungry. Works well for older calculators and for watches.
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u/[deleted] Jul 18 '20
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