Solar charger
#2
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Joined: Oct 2005
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#3
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Joined: Jul 2008
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From: Minneapolis, MN
I don't think there's anything solar that's small enough to fit on the handlebars that would provide anywhere near enough juice to charge a modern phone.
If you're just out riding for the day, the best solution is an external battery with a usb port. They sell a bazillion of them on amazon that provide enough power to ride all day.
For touring where you don't have electric, a hub dynamo is the most likely to work well and consistently. They also sell larger solar panels that you can put on the back of your bike that I've heard of working.
If you're just out riding for the day, the best solution is an external battery with a usb port. They sell a bazillion of them on amazon that provide enough power to ride all day.
For touring where you don't have electric, a hub dynamo is the most likely to work well and consistently. They also sell larger solar panels that you can put on the back of your bike that I've heard of working.
#4
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Joined: Jun 2015
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From: Down Under
Bikes: A steel framed 26" off road tourer from a manufacturer who thinks they are cool. Giant Anthem. Trek 720 Multiroad pub bike. 10 kids bikes all under 20". Assorted waifs and unfinished projects.
I've never met anyone touring who has successfully used solar to keep up with modern smart phones, they generally tend to use it to delay the inevitable, they still need to plug in sometimes (not saying you can't do it, just that I haven't met them). In order to get enough charge the panels need to be quite large as the robust panels are generally amorphous silicon, which is much less efficient. Then there is the security risk, solar panels are pretty attractive to thieves.
Hub dynamos will keep up with a smart phone in conjunction with something like a Forumslader that maximises output, for most touring but will struggle if the phone is doing something high drain, like being a WiFi hotspot.
Hub dynamos will keep up with a smart phone in conjunction with something like a Forumslader that maximises output, for most touring but will struggle if the phone is doing something high drain, like being a WiFi hotspot.
#5
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Joined: Jul 2013
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From: Toronto
Bikes: Sekine 1979 ten speed racer
I'm intrigued with solar chargers either for camping, travelling or cycling. But realistically, they are impractical. They are heavy so for camping it's better to carry spare dry cells and battery packs- how long are you gone for anyways? For travelling, you'll find and electrical outlet in your hotel room.
If you leave your solar panel out unattended, it'll get stolen.
For cycling, carry spares or get to a coffee shop.
If you leave your solar panel out unattended, it'll get stolen.
For cycling, carry spares or get to a coffee shop.
#6
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Joined: Dec 2005
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From: Reisterstown, MD
I haven't used it for cycling, at least yet but I have had success camping. The last two years I used a goal zero Venture 30 and nomad solar panel at my sons Cub scout camp Venture 30 Solar Recharging Kit | | Goal Zero
4 days total. I made it without needing to plug in. I kept the panel clipped to my daypack. Granted this isn't like hiking, as the scouts had lots of activity stations throughout the day, so it would be easy to leave my pack in the sun while these sessions were running. I would imagine on the back of the bike it would get pretty good sun as well. The venture 30 can charge my iphone about 2.5 times and it recharged in about a day of good sun. 2 years in a row I never had to plug my phone into an outlet to charge.
4 days total. I made it without needing to plug in. I kept the panel clipped to my daypack. Granted this isn't like hiking, as the scouts had lots of activity stations throughout the day, so it would be easy to leave my pack in the sun while these sessions were running. I would imagine on the back of the bike it would get pretty good sun as well. The venture 30 can charge my iphone about 2.5 times and it recharged in about a day of good sun. 2 years in a row I never had to plug my phone into an outlet to charge.
#9
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From: Mid Atlantic / USA
Bikes: 2017 Specialized Crosstrail / 2013 Trek Crossrip Elite
I have a 3 panel solar charger that's about 7 inches by 10 inches per panel. So it's fairly big when unfolded.
If I leave it in the direct sun at high noon with clear line of sight to the sun, it will charge a modern smart phone at the rate of about 1% per every 5 minutes. That's the peak efficiency, the best it works.
It's too big to mount to a bike. And even if I could mount it, it won't stay aimed directly at the sun as I ride, lowering it's efficiency even more.
Anything that will mount to the handlebars isn't going to be strong enough to actually do much.
I've yet to find a practical use for the panel I have.
#10
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Joined: Sep 2016
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There are none that will fit on handlebars and charge a phone.
I have a 3 panel solar charger that's about 7 inches by 10 inches per panel. So it's fairly big when unfolded.
If I leave it in the direct sun at high noon with clear line of sight to the sun, it will charge a modern smart phone at the rate of about 1% per every 5 minutes. That's the peak efficiency, the best it works.
It's too big to mount to a bike. And even if I could mount it, it won't stay aimed directly at the sun as I ride, lowering it's efficiency even more.
Anything that will mount to the handlebars isn't going to be strong enough to actually do much.
I've yet to find a practical use for the panel I have.
I have a 3 panel solar charger that's about 7 inches by 10 inches per panel. So it's fairly big when unfolded.
If I leave it in the direct sun at high noon with clear line of sight to the sun, it will charge a modern smart phone at the rate of about 1% per every 5 minutes. That's the peak efficiency, the best it works.
It's too big to mount to a bike. And even if I could mount it, it won't stay aimed directly at the sun as I ride, lowering it's efficiency even more.
Anything that will mount to the handlebars isn't going to be strong enough to actually do much.
I've yet to find a practical use for the panel I have.
#11
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Joined: Oct 2009
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From: Austin TX USA
Bikes: Bob Jackson 853 Arrowhead; Felt VR30; Kinesis UK RTD; Hujsak tandem
I did tour with a small fold-up solar charger (sort of like this—I don't think the exact model is in production anymore) that mostly served to "delay the inevitable" as Trevtassie put it, although that was good enough for my purposes. I had this lashed across my panniers in back.
These days, good high-capacity USB batteries are common and inexpensive, so there's not as much need, as long as you can camp near an outlet every so often.
These days, good high-capacity USB batteries are common and inexpensive, so there's not as much need, as long as you can camp near an outlet every so often.
#13
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Joined: Sep 2016
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here's a 40watt that looks pretty good price/performance for touring, its about 4sq ft.
https://www.amazon.com/KINGSOLAR-Hig...+panel+folding
some of the 20watt ones look useful too for trickle charging.
#14
aka Tom Reingold




Joined: Jan 2009
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From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
here's a 40watt that looks pretty good price/performance for touring, its about 4sq ft.
https://www.amazon.com/KINGSOLAR-Hig...+panel+folding
some of the 20watt ones look useful too for trickle charging.
https://www.amazon.com/KINGSOLAR-Hig...+panel+folding
some of the 20watt ones look useful too for trickle charging.
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Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
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Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
#15
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Joined: Sep 2016
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how many mAh is that and how long does it take to recharge?
#16
aka Tom Reingold




Joined: Jan 2009
Posts: 44,167
Likes: 6,386
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
I think the one I have is rated at 5,200 mAh, and they now have it available in 6,700. It takes about five hours to charge.
__________________
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
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