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28W Outdoor Portable Foldable Solar Panel, High Efficiency Portable Solar Panel Kit, Compact and Portable, USB Output Solar Panel Charger
28W Portable Solar Panel Specification
Model：SJSO-28
Material：ETFE Surface
Folded Size：11.23×6.23×1.19in
Unfolded Size：24.89×11.23in
Weight：1.22lbs
USB-A Output：5V/3A,9V/2A,12V/1.5A （QC3.0 18W Max）
USB-C Output：5V/3A,9V/2A,12V/1.5A （PD 18W Max）
Portable Foldable Solar Panel Charger with USB-A/USB-C port for Smartphones, Folding Solar Panels for Various Outdoor Activities
Dual Output Port Portable Solar Panel
28W Portable Foldable Solar Panel Charger with USB-A and Type-C Output Ports. And Maximize the Speed of Charging your Devices.
ETFE Surface
High Light Transmittance and Grooved Surface Reduces Light Reflection and Increases Light Absorption by the Solar Panel, Prolonging the Life of the Portable Solar Panel
Foldable & Lightweight
With Folded Dimensions of 11.23 x 6.23 x 1.19 Inches and a Weight of 1.44 lbs, You can Easily Pack the Portable Solar Panel Charger into your Backpack and Take it Anywhere.
Crack Resistance
SP batteries are thinner and more flexible than conventional batteries. When an SP battery ruptures, the copper metal base on the back keeps the battery intact and maintains high power output. When a conventional battery ruptures, the cell breaks and typically loses a significant amount of power.
- Ultra-pure, n-type, monocrystalline silicon for maximum power
- Tin barrier prevents corrosion
- •Uniquely durable back-contact design with no ribbons
- Clean and elegant aesthetics by designing out front contacts
Portable Solar Panel Charger--Suitable for Various Outdoor Scene Activities
The Compact Lightweight 28W Portable Foldable Solar Panel Charger can be used for Emergency and Various Outdoor Activities, for Hiking, Camping, RV
J. S.
Reviewed in the United States on February 1, 2025
This is the lightest, most efficient solar panel that I could find and I did a ton of research. I'm getting a steady 115 watts at 1pm in January at 40° latitude. That's 95% of Sokiavola's rated efficiency for those of you who don't like to do math. I made a stand for it out of a repurposed hunting blind strut hub from an old broken hunting blind. Stand sits at 40° tilt inclination to optimize for my home latitude. This will be part of the reason why I'm getting the efficiency but the bottom line is that the panel does what they say it can do and that's impressive. I'm attaching pics of my setup and a screen shot of the performance through my bluetti app.95% tested efficiency, $1.33 per watt (at full price). 5.63 lbs lbs which comes out to be 20 watts per lb. And it's ip68 waterproof because the only DC out are mc4 ports which is a win for me. I would prefer waterproofing over having DC charging ports that are open to the weather and I will only be charging my power station with it.It doesn't come with a stand so you will have to make one or hang it, which could diminish your efficiency if you don't get the angle right but that's on you. You get what you earn. The cord that comes with it plugs into to the mc4 outs hardwired to the panel and is weatherproof. It also compatible with all the major power station brands.In my opinion this is the best lightweight solar panel for the money.
Agustin C.
Reviewed in the United States on September 12, 2024
I’m happy they remembered Senior Citizens , we are not strong like a young person , so a light weight solar panel is extremely important , especially in van life , cause space in a van is extremely limited , and this solar panel folds up smaller then the size of your car seat & weighs about the weight of a small rabbit , not to mention that it’s very efficient .I unfolded very easy and place it on top of my roof on my van , it’s very compact on top of my roof and extremely lightweight , and I also love the fact that I still have space on top of my van for two more solar panels , so thats exactly what I did , I purchased two additional wafer panels from EF at 100w each plus this small compact 120w solar panel that folds to the size of my front seat like a thin little book , now I have a total of 320w of solar panels , and now I can charge up my Delta 2 in a day . I prefer to put up my three solar panels and take them down at the end of the day , parked in a different location , cause I don’t want anyone of the locals to know I have power stations and solar panels inside my vehicle and compromise my safety . And one last thought , make sure you also purchase from Amazon a tool that disconnects your mc4 connectors unless you’re a strong person . In conclusion I highly recommend this small 120w lightweight folding solar panel to everyone.
Taylor
Reviewed in the United States on August 28, 2024
I bought this to keep my Anker 521 portable battery (256wh) topped off during an upcoming camping trip. It's built well and folds up small enough to toss in a backpack. The cable it comes with is a little short, but it has the end I needed for my battery and I'm sure I can find a longer cable if I need it.While it's rated for 50w, it seems manufacturers all the way from name-brands to ones like these rate them higher than you'll actually get in the real world. On my roof angled towards the sun on a clear day, I get between 30 and 35 watts into my Anker - perfect for my use case, as I'm only going to be using my battery during the night. If you need more than that, get the 100w version.Update: it performed pretty well, pictures attached. I definitely recommend getting an extension cable though.
Customer
Reviewed in the United States on December 22, 2024
Rebuilding my campervan and didn’t want to mount a solar panel on the roof as before. I already have a battery isolator to charge my house battery while driving, but wanted some solar to top up while camping. I’ve only tried it once but it worked like a charm. In the somewhat low Virginia winter sun with clear skies my charge controller was showing it producing about 13.7 volts at over 4 amps. The design is rugged, and I love that it folds up so compactly and I can store it away easily. If you’re using it like me and will be connecting/disconnecting with MC4 connectors I strongly suggest using a tool designed for that purpose. It’s a little disappointing that they didn’t include a plastic tool for this purpose, but you can pick up a set for a few bucks here on Amazon. Would definitely buy again.
DC
Reviewed in the United States on October 25, 2024
This is a great panel. It's the smallest panel by far when folded up compared to other panels. This makes it easier to transport and pack for trips without having to worry about larger panels. The downside is that this doesn't have a built-in stand like many do. So if you prioritize portability over performance, this is the panel to get. That said, performance is quite good if you can prop up the panel to face the sun. I was able to measure 110w (which was I believe the max my River 2 can pull) in direct sun up in New England.Some of the specifications in the product description are slightly off. The open circuit voltage (when tested with a multimeter) and according to their user manual is actually 23.5V - 25.9V. Operating voltage is 19.6V - 21.6V. These voltages were too high to use with my Anker 548.
James L. Justus
Reviewed in the United States on October 13, 2024
Great portable solar panel if you have limited space in your vehicle. The folded size is compact and easy to stow. The build quality is great and it seems tough enough. We’ve used ours on a few overlanding and camping trips since purchasing. It’s easy to deploy and fold back up. It charges our power generators and runs our fridge without issue. You do have to keep in mind that with this being a multi-fold panel and not a bi or tri fold rigid one, it will have to hang or lay flat as it can’t be angled with a kickstand or prop. There are two included carabiners and grommets on the panel itself. We’ve either played it flat atop our jeep roof, across the front window with the carabiners, or on the hood. My only wish was that the included cable was just a foot or two longer.
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