As I mentioned here back in 2013, I bought two Joos Orange Solar panels. I'm still very pleased with them more than 7 years later. They sure have been durable in pretty extreme use. One dropped off my bike onto gravel during a bumpy downhill at 65kmh, another was run over by a car, one was dropped into a pond...no damage to either. They can be locked to the bike with a U-lock and I have found they charge more slowly but still consistently in the rain and inside a tent. The built-in Li-Po accumulator batteries are still good and continue to hold a charge.
Early models had a problem with their charging connector that was soon corrected; mine never had a problem.
Overall, I have found them good value for the money I paid. From completely flat to full, they require about 12 hours of bright sunshine to recharge completely; cloudy/rainy days mean they take a little longer. I never use them to charge my gadgets during the day. Instead, they do that overnight while I am sleeping in my tent and run them down to about 25%. During the day, I use my SON dynohubs on my bikes and sometimes on the Extrawheel trailer and charge via my Tout Terrain The Plug 2+, Cycle2Charge, or B&M e-Werks on my various bikes.
Best,
Dan.
