13 votes
Accepted

Charging eBike Battery with Solar

A 100 watt solar panel is nominal watts under ideal situations. You'll be lucky to get 25 watts tied to the back of your bike - and this would be only for a few hours of the day, from 11a to 3p. Given ...
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  • 28.4k
9 votes

Is it possible to charge an ebike from a 12V solar powered battery?

You can charge it, but you probably won't do as well as you think. You're on the right track but you're missing a couple of things: Solar panel ratings: These are optimistic and assume full sun ...
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8 votes

Charging mobile phone using the battery of a rechargeable bike light?

Answer No, you need an item designed for this purpose. Whether yours do or not, it totally depends on the product. Many modern lights are charged by USB, but they can't supply USB to other devices....
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5 votes

Is it possible to charge an ebike from a 12V solar powered battery?

An additional downside is electrical conversion losses. The solar panel will likely be putting out around 12V at some current, perhaps 5W for a 500 gram panel to 20W for a 2.5 kilogram panel. That's ...
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  • 96k
4 votes

Charging eBike Battery with Solar

Those are 48V batteries, which you want to charge with a 12V (nominal) solar panel. That's not going to work directly. So we look for an indirect solution. At the very least some form of boost ...
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3 votes

E-bike battery charger making horrible noises, only works certain outlets?

Even though the design may be CE compliant, the unfortunate reality is that cheap manufacturers will still leave out "unnecessary" circuit components or replace them with fake ones when actually ...
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  • 1,129
3 votes

Charging eBike Battery with Solar

All great responses above, particularly regarding the true efficiency of charging the batteries via solar. In an ideal world, this would be so effin cool, to theoretically ride across the country ...
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3 votes

Charging mobile phone using the battery of a rechargeable bike light?

Most lights are not designed for this, and it will not work. Anyhow, even if you had a light that this could work for, its not a great idea to get into the habit of. Why? Phones take a decent amount ...
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2 votes
Accepted

Charging mobile phone using the battery of a rechargeable bike light?

To charge a phone you need exactly 5V, at least 0.5A but ideally 1A or more. Forget about USB lights. Their internal batteries are 3.7V which is hard to convert; they're also inaccessible. But many of ...
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2 votes

Shimano STEPS E8000 battery won't charge

"The second problem is that im not sure if a new battery will work wihout pairing/programming. ... and will a new battery work (plug'n'play)?" Yes, no problem, I've used three different batteries on ...
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2 votes

Shimano STEPS E8000 battery won't charge

It looks like you might have bypassed the charge controller on the pack and charged the cells directly? The smarter pack controllers do a form of coulomb counting and will see anomalous or unexpected ...
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  • 28.4k
2 votes

E-Bike Battery not working

E-Bike was just 1 and a half year old The e-bike battery from bosch has 2 years warranty. The e-bike itself has just 1 year warranty. Battery was sent from a local store to bosch and I received a new ...
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2 votes
Accepted

E-Bike Battery not working

You should tell your friend ASAP that the bike is not charging. Ask if there is a trick to making it work. Your worst case is the battery has died, and you need to offer to contribute toward a new ...
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  • 96k
1 vote

Why do my USB charging ports fail?

Micro-USB connectors break rather easily if you attempt to pair them "upside down". Memorize the needed orientation of the charging cable. A partially broken socket may work with some ...
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  • 3,312
1 vote

Why do my USB charging ports fail?

This really needs more investigation on your part to come up with the answer. Start eliminating possibilities and see if the symptom stays or moves away. Iterate on this and figure out the root ...
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  • 96k
1 vote

Bosch 400Wh battery first led only is flashing and refuses to charge

When you discharge a lithium-ion battery all the way you can run into serious problems. If the battery is relatively new it may be under warranty and an exchange would be your best bet. The battery ...
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  • 1,556
1 vote

Shimano STEPS E8000 battery won't charge

Are you sure all connections are clean between the battery and charger? I try to keep things clean and have been advised by my dealer ( Cooksons in Prestwitch). Recently neither of us could see a ...
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1 vote

Shimano STEPS E8000 battery won't charge

I looked at the Shimano protocol and they put a challenge response between the bike and the battery in order to prevent replacing the cell. Looking at your picture, I see a white PCB in order to do ...
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  • 11
1 vote

Charging eBike Battery with Solar

My e-bike battery of 500 watt-hours lasts at 24 km/h around 120 kilometers. Thus, it lasts for 5 hours. This requires charging of 100 watts if I used solar panels to charge the batteries. I estimate ...
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  • 11.4k
1 vote

Charging mobile phone using the battery of a rechargeable bike light?

Yes, some models have the second USB A type port to provide power, using the charged lamp as battery pack. You can charge your phone or the red rear light, for instance. Google 'bike light USB power ...
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  • 3,312
1 vote

Charging a Garmin Oregon GPS

Yes - I have done this using a SP PD-8 and a Sinewave Reactor . However, it's easier if you use the Reactor to charge a cache battery, and then charge the Garmin from that. This is because the ...
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  • 1,326

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