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charge from a solar panel or generator hub?

Old 03-14-16, 04:23 PM
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charge from a solar panel or generator hub?

Has anyone gone on an e bike tour and charged from a solar panel? Can you have a second battery, and charge from a dynamo hub? What works for a back country tour where you do not have an electric outlet every day, or for many days? How much does a battery weigh?
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Old 03-14-16, 06:00 PM
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You can charge from a solar panel, how fast depends on the size of the battery and the panel. No, you can't charge from a generator hub unless it's connected to a windmill.
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Old 03-14-16, 06:07 PM
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I've gone on 3 bike trips/holidays with my E-Assist, and the wife came along with her E-Assist bike for two of them... Averaged about 750KM per trip (in total) of riding the bikes and never plugged into a wall socket, Yay... Probably about 30 days of riding in all. We charged up the batteries from a solar panel (120watt) on our truck & camper... If you want to do a trip without plugging into a wall it gets expensive but certainly can be done with just charging directly from a folding solar panel (300 watt) you can carry in a backpack... All you need is BIG $$$. A dynamo hub is useless for anything but lights and "maybe" a cellphone... JMO As for carrying an extra battery, it "could work" if, you can stay in a place where you can plug in, basically every night...

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Old 03-15-16, 07:22 AM
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A dynamo hub is useless for charging an ebike battery. Even if it generated enough watts to be useful, they would have to come from somewhere. "Somewhere" being the battery you're trying to charge, and your legs. What with thermodynamics and energy loss during conversion, it would be more effective to use that energy to move the bike in the first place.

You could in principle charge the battery with a solar panel, but I'm not sure exactly what hardware you would need, or what the limitations would be.
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Old 03-15-16, 10:25 AM
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Here you go, all you needs is some big $$$, and 2 to 3 Hrs of sunshine per day and you can just keep on going and going, never needing to plug into a wall ... HPC SunCapture 300- Folding Solar Panel and Charger - Hi-Power Cycles
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Old 03-15-16, 08:36 PM
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The BioLite stove, while neat for trickle-charging cell phones, doesn't produce nearly enough power to charge an ebike. A couple watts continuously, meaning it would take about 250 hours to charge a 500 watt-hour pack. And that's assuming you could step the voltage up high enough to do anything.
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Old 03-17-16, 09:44 AM
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Yamahaź EF1000iS Portable Generator : Cabela's This or something like this "could/would" work I guess, only 28Lbs...
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