[Upgraded] BigBlue 3 USB Ports 28W Solar Charger(5V/4.8A Max), Portable Foldable Solar Panel for Camping, IP44 Waterproof, Compatible with iPhone 11/XS/XS Max/XR/X/8/7, iPad, Samsung Galaxy LG etc.

When I first purchased this portable solar panel, I was skeptical about its capabilities. To be honest, I didn’t anticipate its impressive performance. Let’s begin with the build quality. The manufacturer has done an excellent job with the design and construction. The foldable design makes it incredibly portable, and the panels themselves feel sturdy and well-made, not cheap at all. I appreciate that it comes with carabiners, which makes attaching it to a backpack or hanging it easy and convenient.Since I’m always on the go and carry a lot of tech, I’m constantly in need of extra power for my gadgets. I paired this solar panel with a NESTOUT 15000N portable outdoor battery, and they work seamlessly together for my needs. The solar panels keep my battery charged, and I use the power from the battery to quickly charge my devices. The USB-C ports and USB-A port works great without any problems and allows me to connect to my devices quickly without any delay.Now, don’t expect these small panels to charge devices rapidly. They do the job, and so far, with the sunlight I’ve been exposed to daily, they’ve worked flawlessly. I highly recommend this product. Considering its limitations and my use case, I believe it was a wise investment. I’ve also recommended it to several friends who work outdoors, and they’re equally impressed with its performance.

I actually really like it,It's a moderate at 15 watts,I didn't realize this was the smaller wattage of the panels,I actually thought the color had something to do with the price.But what's important is,it works really well and better then I expected.It's enough to charge things moderatly fast, in good sun of course, it's Ultra lightweight,and I couldn't believe how small and well made this thing is!It has a special compartment/pocket to hold the phone or battery pack in place with a strap to keep the item from falling out while charging,And keeps the item out of the direct Sun.It's actually a lot fancier looking than I expected as well and the panels seem to be tough!This will be perfect for adventures in the woods!

My intended use of this product is to maintain complete power independence for months-long, off-grid backpacking (thru-hiking). I've always laughed at the hikers who try to make things work with a single panel on top of their backpack, but the bigblue can work, under the right conditions.My electronics consist of generic bluetooth listening devices, a cell phone, a gps communications and tracking device, a rechargeable tracking watch, a rechargeable air mattress inflator, a rechargeable headlamp, and a 10,000 mAh power bank with dual charge inputs and a maximum recharge rate of 22W. Since the bigblue only delivers a maximum of 5V @ 2.4A to each of its 3 usb, connectors, it means you can only expect a maximum of 12W from each usb connector. Therefore, to obtain the maximum possible powerbank recharge rate from this setup, I needed a powerbank with 2 charge inputs. The only such one I could find in the 10k mAh range was the nitecore nb10000 gen 3. In theory, I could get 24W from 2 of the bigblue usb connectors, and I would be wasting a couple of watts on the nitecore, but in reality so far I have not gotten more than about 16-17W form the bigblue, as measured using an Anker Prime 27,650 power bank. That's in southern US and november sky, but I would not expect more than about 20-21W under perfect conditions, anyway.I have tested and determined that hanging the bigblue from the backpack is pretty much useless and not worth the effort. Also, it only delivers a trivial amount of power under heavy cloud conditions. It does deliver modest amounts of power when the sun is still fairly bright through a fully overcast sky. Under partly cloudy skies, with thicker clouds, the output falls off dramatically when the sun is blocked.The most workable solution that I have found is to pack up the bigblue in the morning, leaving it in the top of my pack. I'll take a 15 minute break mid-morning and quickly pull out the bigblue and connect the nitecore to 2 ports and my cell phone to the third port, providing the right sun conditions exist. The bigblue does not have a kickstand, and the panels flop around, so I find a long, straight stick and prop up the panels using a few bits of gear to prop the stick and panels up straight. The same process is repeated at lunch time for a 1 hour lunch break, and possibly another short break mid-afternoon. Using this approach, under the right conditions, I can fully recharge my phone from about 80% and I can recharge up to 2 bars out of 4 on my power bank. This is generally all I need, but I have not determined how long this setup would last with prolonged days of no adequate sun. I could probably last a week or so with careful use of electronics, but then I would be digging out of a power deficit for several days after. If the cloudy conditions persist, I would be forced off trail to recharge.I have also found that the bigblue can still deliver 3 watts or so folded up, with only one panel exposed to full mid-day sun and laying flat . This might work to charge low-power devices with the bigblue laying flat on top of the backback. It's always going to be important to make sure any means of securing the unit does not cast any shadow anywhere on the panel.My bigblue weighs 24-7/8 ounces. It's an awful lot to lug around. I think a lot of that weight is in the fabric, velcro closures and hanging grommets. I keep looking at the thing and wondering how much I could cut off. The 3 output connectors, with limit to 12 watts on each, is a pain when trying to find a suitable power bank that can recharge at a faster rate than 12 watts. Maybe 2 usb-c's, with no limitations, would work better? The weight and the connectors are my reason for 4 stars.So far, I have not tested for many days on trail, but it's looking possible. The implementation is not ideal, but I'm balancing that against having to go off trail and find an outlet.

The solar charger is well-made and feels durable, with solid construction that holds up to regular use. It charges reliably and performs just as expected, making it a dependable option for keeping devices powered on the go

I bought this for my hike along the Colorado Trail. I only went into town once in 3+ weeks. This kept my external battery charged the entire trip. Then I charged my phone and watch from my battery.It rained everyday day except for three. Generally I would attach this to the back of my backpack. During the day, it would get enough Sun to get a decent charge. It was never a 100% full charge. But enough to keep my battery well over the 50% mark. I'd say most the time my battery would drain to around 20% and recharge to around 85%. I had the best charging experience when at rest. I'd just lay this out if the ground, facing the Sun, and it seemed to charge pretty fast.The worst thing about these solar panels is the compartment where you connect the battery or your peripherals. It's held closed by only a small piece of Velcro. It basically doesn't work. Anything you put in that pocket to charge will fall out.For me it wasn't a big deal. After having my battery fall out routinely and daily, it just fell out of the pocket from the solar panel, and into my large external center pocket on my backpack. From that point forward, I would never use the pocket this solar panel comes with. I would just put my battery in my packs external pocket, and run a cable to the solar panel to charge it. Problem solved. But definitely something to be aware of.