FlexSolar 20W Portable Solar Panel Charger, USB-A USB-C 5V Output

This has proven to be a great little experimental purchase. I wanted to "go green" with my phones, and this has done the trick. It charges well and reliably for its size. You do need to make sure to place it in direct sun as much as possible. It does everything it says it does. Note that you DO need to use backup batteries to get the best use of this product. It does not hold any charge on its own.

Charging an iPhone Pro went well, but not a Macbook Pro hahah. The charge in was not faster than the charge used on my laptop. But I tested this from inside, so it might do better outside. I like that the ports are on the edge so you don't have to worry about wires bending and breaking with time.

Not sure because of the fact it is foldable, its not super powerful to charge phone. I left for hours in sun light. It's just 20% charged. Can be used for little things. If you are looking for latest phone to charge need better one.

I believe this is a solid solar panel, perhaps for a biker or camping may find this most useful, as it is lightweight and very small and light. Will do as advertised

It charges my iphone as soon i flip it open. Even under a shaded area. Its super light and durable.

The embedded wire, that runs through the hinge points, started deteriorating after just 3 days of use on the Crest Trail ( backpacking). It took me about 2 weeks to figure out what was going on, and it died shortly there after. If the wiring was more robust, I'd have only given it a 2 star rating, as the controller was also quite goofy, and walking through a shaded forest caused voltage to run back through my phone, the opposite direction and kill my battery. The killer flaw that made this panel so bad, was the low voltage. I assume, by how it acted and died, that it is 2-3.3 volt panels wired in series, that when walking through partial shade, the voltage drops below 5 volts, causing it to back flow. This can easily be fixed by using a higher voltage panel. Now to the wiring. The wires are embedded in the plastic, and run in series with the other panel, making it useless if the connection is broken. The hinge wires should break out and be twisted into a loop so that there is plenty of give in the angle. It will look tacky but be a marked functional improvement. And again, the panels should be a higher voltage, and wired in parallel, so than a broken connection doesn't render the panel inoperable. The third and final gripe, is that the seller should include 4 metal clasps instead of just the 2, as it was flapping around on my backpack like a flag, with every slight breeze. When it worked the power was good,and it looked nice.

I took this on a 7 day back-country hike at Philmont Scout ranch in New Mexico. I was often out of cell range, so had my iPhone 13 Pro Max on airplane mode most of the time. Hanging this from my backpack, it consistently charged my phone from ~70% to 100% in 2 to 3 hours hiking in and out of shade and partial clouds each day. In bright sun, it charged my “brick” backup lithium battery from 40% to 100% in 4-5 hours of bright sunlight. In a reasonably sunny climate, my experience is that this panel could keep personal electronic devices for 1 person charged indefinitely while on a trek. Thumbs up!

It’s a solar panel, it folds up nicely, but I haven’t been able to get it to charge anything with more than 5 Watts, far from the advertised 20W. Direct sunlight, compatible cables, everything needed to get to at least 20W on a compatible wall charger, but not a single device I’ve connected has gotten more than 5W, most of the time it’s barely 1.5W. Maybe it’s just this panel, but it doesn’t behave at all as described.

You can tell once you pull this out of the packaging that the build quality is very solid. The panels are solid and protected from the elements. Ad long as the ports remain connected inside the unit it should last for years. I wish the USB c output could push the full 20 watts and not just 15. But that's really my only criticism. Great to have when camping to keep all your power banks charged. Between the kids, my wife and myself we all have batteries that need charging. This thing seems to keep up charging all of us. A 10,000mah battery pack charges to full in under 4 hours. Recommended!

I took the FlexSolar 20W Solar Panel Charger on a recent camping trip, and I’m really impressed with its performance! It’s compact, lightweight, and folds up nicely to fit in my backpack, so it doesn't take up much space. The build quality feels solid, and I love that it’s IP67 waterproof—definitely came in handy when it rained briefly! Charging my phone, power bank, and even a small fan was easy with the USB-A and USB-C outputs, which is super convenient. It charged my devices at a good pace, even on cloudy days, though of course, direct sunlight works best. I like how I can set it up anywhere—on the ground or hanging it off my backpack while hiking—and it just works.

Not sure Id rely on this for a cellphone/tablet. Helped maintain my current battery level but showed a 9hr charge time for a Galaxy S20 with a 60w capable C to C charge cord. Smaller battery devices charge fairly quickly. The panel is well made, durable and come with 2 clips to hang on the back of a backpack. If you want to charge something like a cellphone Id aim for a 40+ watt panel, that way if its overcast, you still may see around 20w?

A beautifully made piece of junk. DO NOT BUY. I own a number of Solar generators. Hanging directly in the sun with no clouds or trees or shadows, my phone at 50% current charge showed 7 hours and 6 minutes to recharge. Ten minutes later it showed 7 hours 7 minutes. A nice idea and lovely folding look, but a complete waste of money.

Takes a very long time to half charge a phone. Must be in direct sunlight to charge. Not very satisfied.