MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy
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Availability:
Only 10 left in stock, order soon!
Arrives
Tuesday, Apr 28
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Color: Orange
Features
- PORTABLE, FOLDABLE & EASY TO CARRY: The MARBERO portable solar panel is compact and lightweight, with a folded size of 11.4" x 6.3" x 1.3" and weighing just 1.32 lbssmaller than an iPad Pro. It easily fits into any camping backpack or hiking daypack, or can be carried by hand, making it perfect for outdoor activities like camping, traveling, or any occasion when you need it. Designed with 4 attachment holes, this foldable solar charger can be conveniently hung anywhere using the included carabiners.
- HIGHER SOLAR CONVERSION: The 21W portable foldable solar panel is equipped with high-efficiency solar arrays, offering a conversion rate of up to 23%, turning sunlight into electrical energy for faster charging. The MARBERO 21W portable solar panel features a built-in smart chip that intelligently detects your device, maximizing charging speed while protecting it from overcharging and overloading. This ensures a more relaxed and worry-free outdoor experience without the concern of running out of power. The smart charging technology also provides optimal, 100% safe charging in direct sunlight.
- POWER IN SUN OR SHADE: This 21W portable solar panel maintains high efficiency even on cloudy days. Under full sunlight and at an optimal tilt angle (35 to 65 degrees), it generates 18W21W of power. On cloudy or overcast days, the foldable solar panel still provides 12W16W, ensuring reliable power for your devices in any weather.
- DURABLE & VERSATILE: The MARBERO portable foldable solar panel is crafted from high-quality, durable Oxford cloth and features IP65 waterproofing, dust resistance, and high-temperature durability. This portable solar charger is perfect for a wide range of outdoor activities, including camping, hiking, picnics, RV adventures, road trips, travel to remote areas, car trips, boating, power outages, and off-grid living. Its an essential piece of emergency backup gear.
- WIDE COMPATIBILITY: The USB A and DC ports are built into the power box of the MARBERO 21-watt portable foldable solar panel charger, making it perfect for charging your smartphones, tablets, laptops, power bank, speaker, portable power stations, and more. This portable solar panel, designed for camping and outdoor use, offers a reliable solar panel charging solution wherever you go, whether you're using it as a camping solar panel or for general on-the-go power needs. Our portable solar charger can't store electricity and can't charge laptops and power station.
- PACKAGE INCLUDES: 1*MARBERO Foldable Solar Panel 21W, 1*DC 5521 Cable, 3*Interchangeable DC Adapters, 1*User Manual, 2*Carabiners. NOTE: Any clouds, the angle toward sunlight, operating temperature and sunlight intensity will affect the real output, we don't suggest you use this foldable solar panel inside of a window or windscreen.
Description
Specifications:Model: SL21WWattage: 21WConversion Rate: 23% Folded Size: 6.3'' x 11.4'' 1.4''Unfolded Size: 26.8'' x 11.4'' 1.4''Weight: 1.32 lbsUSB A Outputs: 5V / 2.4ADC Output: 18V / 1.1AMaterial: Monocrystalline Silicon & Waterproof FabricOpen Circuit Voltage: 21.6V ± 5%Short Circuit Current: 1.26A ± 5%Operational Voltage: 18V ± 5% Operational Current: 1.17A ± 5% Operational Temperature: -10~70℃ / 14~158℉
Brand: MARBERO
Material: Oxford cloth
Product Dimensions: 11"L x 6"W x 1.3"H
Item Weight: 1.3 Pounds
Efficiency: 23%
Efficiency: 23%
Amperage Capacity: 1.26 Amps
Maximum Voltage: 18 Volts (DC)
Upper Temperature Rating: 70 Degrees Celsius
Maximum Power: 21 Watts
Special Features: Efficient power generation in both sunny and cloudy conditions, high conversion rate, portable design, and smart charging technology
Output Voltage: 18 Volts
Connector Type: DC 55*21 to DC 55*21
Item Dimensions L x W x H: 11"L x 6"W x 1.3"H
Item Weight: 1.3 Pounds
Folded Size: 11*6 INCHES
Brand Name: MARBERO
Included Components: 2 Carabiners, 3 Interchangeable DC Adapters, Bag, DC 5521 Cable, User Manual
Model Number: ET-21W
Manufacturer Warranty Description: MARBERO 21W Solar Panel will offer 12 months warranty and 7*24 customer service after your purchase. If you have any problem, please feel free to contact us.
Manufacturer Part Number: ET-21W
Manufacturer: MARBERO
Item Type Name: Oxford Nylon
Material Type: Oxford cloth
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Apr 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Gray
Well made portable panel that folds down to a very portable size. Testing under ideal conditions I got around 80w/100w from DC, and 45w/45w out of USB-C PD (15v 3a). A major reason I picked this panel was the mix of portability and the fact that it had decent native USB output. Legs are a little finicky but once set up the panel stays put. This panel is NOT without its flaws 1) When folded there is no snaps, nor is there a handle, nor does it come with a carry case. I would have liked a handle or something to make carrying it a little nicer, but it's not a huge issue 2) that 80w test result was in conditions that my good 100w panel gets its full 100w. If it wasn't for the fact that this panel was quite competitively priced I would have docked a star for this.
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Reviewed in the United States on July 24, 2025 by Benjamin S
Color: Black
This will be great for our power station when we go camping great size, quality and great value for your money. Looks very durable.
Reviewed in the United States on December 11, 2025 by lynn sweeney
Color: Gray
It folds up to a reasonable size, and the connections give you quick and easy options to tie it into your system. I regularly got between 70 and 90 watts, so the rating is accurate. It does not have a battery. I primarily set it up in my windshield, and it's a very good size for that purpose. It does get hot to the touch, but it's a dark product in direct sunlight so that's expected. It doesn't get hot enough to damage anything. I have had it crack ominously a few times while setting it up and taking it down so I have concerns about the rigidity and lifespan, but for now it does what I need it to.
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Reviewed in the United States on January 6, 2026 by Marvin H Hepworth III
Color: Red
Pulling 140ish watts when angled correctly. Folds up nice and small
Reviewed in the United States on March 17, 2026 by Psycraft
Color: Blue
Im using with my bluetti eb3a and it works for that purpose. Not sure about other branded solar power stations but with the bluetti eb3a it has to be clear sun to get unit to accept a charge at the panels full capacity. Im currently getting 39 watts with trees overhead which works for me because im only running about 17 watts to charge phone and fan. All the attachments included are a plus even though I already had the required cable, this panel comes with everything needed to power most devices. A big plus is the ability to connect directly to panel and charge my phone or other USB or dc compatible device without needing a power station. Put it in your cart and order it stop over thinking like I did. Definitely recommend
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Reviewed in the United States on June 28, 2025 by Jeremie Gene
Works just like it is supposed to charge, I use this to charge my portable battery when we are out camping with no electricity. Works great, I place it on the roof of the truck where it will get the most sun light.
Reviewed in the United States on January 4, 2026 by Kelly Schmidt
Color: Red
It's hard to know what to expect from a generic brand panel, but we got a good deal on Prime day, and this had good reviews, so we took a shot. 130$ is a decent price per watt for a portable, if it can get close to its claims. Positives: Out of the box it was obvious it had a solid build qulity. Everything from the legs, to the way it folded seemed well built, and well thought out. I tested it thoroughly on a sunny July day and could get about 136 watts. I would have liked to have seen 150+, but again, for the price per watt this seemed acceptable for a portable panel. It's about the size of a 150 watt panel, so I was a little skeptical of the 200 watt claim. 136 watts would be about right for the size. I'm happy enough to keep it. It will do well enough for my needs at the price, but if you're expecting a better efficiency, you may need to look elsewhere.
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Reviewed in the United States on July 13, 2025 by B S
Color: Gray
I guess you get what you paid for, it's cheap for a reason. Wished it came with a USB C to C, and/or USB A to C, since it has the outlets for both, but eh lol. Definitely one of the best of the budget options out there, but not sure about the claims they gave for this product. It delivers 45–50W in full sunlight at the angle the stands are set to, aimed directly at the sun, and 25–30W in cloudy conditions, at least from my experience. It doesn't feel or seem to be a sturdy product so far, but if you take good care of stuff it'll probably never get damaged easily. Not sure how well it'll handle the heat in the sun where I live yet bcz it's pretty strong here, but still, buy this if you're in a pinch and are also broke lol.
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Reviewed in the United States on November 28, 2025 by Kairu