FlexSolar
Solar Battery Charger with Built-in Charge Controller
Winner
Came out on top with best average finish of 3.5. Most efficient at 0.12 watts per square inch and 15.35 watts per pound. Produced 21.52 watts in sunny conditions. Has rubberized coating with perfect scratch resistance. Will not charge batteries under 5 volts.
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I Had No Idea These Were So Good!
Project Farm
Jan 18, 2026
Winner
Ranked #1
4.8
"Best Overall - Came out on top with best average finish of 3.5. Most efficient at 0.12 watts per square inch and 15.35 watts per pound. Produced 21.52 watts in sunny conditions. Has rubberized coating with perfect scratch resistance. Will not charge batteries under 5 volts."