how to charge 12v bike battery from solar panal

how to charge 12v bike battery from solar panal A 100 watt solar panel is nominal watts under ideal situations. You'll be lucky to get 25 watts/hr tied to the back of your bike - and this would be only for a few hours of the day, from 11a to 3p.

Given that your bike is likely using at least 50-100 watts/hr even on low pedal assist, you're only going to gain 5-10% more range over the entire day. From experience, even with low pedal assist, its highly unlikely you'll get anywhere near the maximum (or even middle) advertised range of the ebike.

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