FlexSolar 40W Foldable Solar Panel Charger with USB-C and USB-A Outputs for Phones, Power Banks, Tablets - Waterproof for Camping, Hiking, Backpacking
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FlexSolar 40W Foldable Solar Panel Charger with USB-C and USB-A Outputs for Phones, Power Banks, Tablets - Waterproof for Camping, Hiking, Backpacking

4.3/5
Product ID: 399175217
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Details

  • Brand
    FlexSolar
  • Material
    ETFE
  • Product Dimensions
    48.8"L x 11"W
  • Efficiency
    High
  • Connector Type
    USB Type C USB
40W max power output
💧IP67 waterproof & dustproof durability
🔋Dual fast-charging USB-A & USB-C ports (18W each)

Description

☀️ Harness the sun’s power with style and speed — never run out of juice on your next adventure!

  • SMART SAFE - Integrated IC chip optimizes charging and protects against overcurrent, overheating, and short circuits.
  • POWER UP ANYWHERE - 40W ultra-lightweight foldable solar panel designed for on-the-go energy freedom.
  • COMPACT PORTABLE - Featherlight 1.76 lbs and folds to 8.0 x 11.1 x 1.8 inches — fits perfectly in your backpack or emergency kit.
  • FAST DUAL CHARGING - Simultaneously charge phones, tablets, and power banks with QC3.0 USB-A & PD2.0 USB-C ports.
  • RUGGED RELIABILITY - IP67-rated waterproof and dustproof with ETFE coating for all-weather outdoor adventures.

The FlexSolar40W is a high-efficiency, foldable 40W solar panel charger featuring dual fast-charging USB ports (QC3.0 USB-A & PD2.0 USB-C) and a 19V DC output for powering small stations. Its smart IC chip ensures optimized and safe charging with overcurrent and overheating protection. Built with durable ETFE material and IP67 waterproof rating, it’s designed for rugged outdoor use. Ultra-lightweight and compact, it’s perfect for camping, hiking, and emergency preparedness.

Specifications

Material TypeETFE
Standby Power ShutoffHigh Efficiency
Amperage Capacity4.2 Amps
Connector TypeDC5521, USB A (QC3.0)
Maximum Power40 Watts
Maximum Voltage5 Volts
Folded Size8.0 x 11.1 x 1.8 inch
Item Dimensions L x W x H48.8"L x 11.1"W x 1.8"H

Have a Question? See What Others Asked

How many amps is everyone getting? i'm getting 1.6a via usb on the 40w solar version. how can i hit 2.1a?
Does solar panel have reverse voltage prevention capability to prevent draining the battery of the item being charged?
Can 3 of these FlexSolar 40W solar chargers be tethered for even more power wattage?
I am going camping in the desert for a week and am looking for a way to charge a mini air cooler. Would I need a power bank also?

Reviews

4.3

All from verified purchases

M**.

A Portable Powerhouse for Outdoor Adventures

This charger unfolds into six high-efficiency monocrystalline panels with a 24% conversion rate, delivering up to 40W of power via three outputs: USB-A (QC3.0, max 18W), USB-C (PD 2.0, max 18W), and DC (19V/2.1A, max 40W). It’s perfect for charging phones, tablets, power banks, and small power stations, though it doesn’t store power itself. Weighing just 2.86 lbs (1.3 kg) and folding down to 8.14 x 11.1 x 1.73 inches (unfolded: 35.9 x 12 x 0.6 inches), it’s easy to stash in a backpack or hang on a tent with the included carabiners. The IP67 waterproof ETFE lamination ensures it can handle rain and dust, though the junction box isn’t waterproof, so keep it dry. Users on Amazon praise its portability, with one noting, “It charged my phone in under an hour in direct sunlight and folds to iPad size” (web:2). The smart IC chip optimizes charging with overcurrent, overheating, and short-circuit protection, and an LED indicator shows charging status.

C**R

So good I bought two.

I purchased this for a 5-day hiking/camping trip and it performed really well. I used it to charge my power bank during the day and used my power bank to charge my devices overnight. I love how well it performed I bought a second one after I got back.

M**.

Decent. Solid. Not spectacular but reliable.

I'm on a 2-month wilderness trail trek. I use this to keep a 20k MaH battery charged, and use that to recharge a number of crucial devices such as a UV light for water sterilization, headlamp, phone (GPS! Movies!), and a commercial vidcam. So far, in summer, and in mountains and desert, it's been painless and fairly quick to keep the battery charged, a few hours on a rest-in-camp day, and occasionally charge the devices themselves. The 15-watt rating seems honest, I had a Big Blue fabric-covered solar charger advertised as 21 watts that didn't charge things as well or as quickly, and unlike this one it wouldn't reset itself after a power fluctuation, so on cloudy days or with "dumb" or smaller-battery devices you often had to unplug everything and let the panel reset. Plus that fabric, and the joints between them, became worn pretty quickly and the fabric tore, sometimes even exposing wiring, and loose "hinges" (just folds, really) made positioning it and standing it up for use a real pain.This has no fabric, and no raised rims to the solar cells, it's entirely laminated, with shiny transparent plastic on the cell side making it a single surface, and the other side is a hard, durable dark and textured material. It is a tremendous leap forward, but be careful, even that protective plastic can get scratches, or clouded by cleaning solvents.The only real problem is the anchoring points you would use to hang it from a backpack are just holes in the corners, leaving a thin strip of material as the only support, and they become easily deformed when they're actually used for their ostensible purpose, and I have stopped hanging it from them for fear of tearing. The "hinges" between panels are the same, thin strips of the base material. So far they remain okay, sufficiently stiff to maintain all three panels in approximately the same plane but it's an obvious possible failure point.The USB housing is solid, and durably anchored to the hard material on the back. The controls are simple-- a red light on one side of the USB socket indicates a good sunlight exposure, and a green light on the other side indicates a solid connection with whatever you're charging. If the connection is so-so that light is blue, and if the device is not connected properly it stays dark (or if it's an old-fashioned "dumb" device like my headlamp. Check the the thing itself that you're charging, it might still be getting current).Overall I would give this a high "good " rating but not excellent. There are cheaper panels, much lighter panels, more durable panels, and more productive panels. BUT IT'S IMPOSSIBLE TO GET TOO MANY OF THOSE CHARACTERISTICS AT ONCE, and this directly hits "the sweet spot" on some things, comes close on others, and IS NOT SUPER EXPENSIVE. In car terms, this is not a Rolls or a Maserati, but it is definitely a good solid Chevy or a Toyota. It may not be expedition-level durable, as I can already see a little bit of wear from daily use, but it's certainly good for the occasional trip to the beach or for the family to take to the mountains on a weekend, or for the emergency kit in the trunk of your car.Improvements? I would suggest looking at reinforcement of the strips between the panels, and eliminatethe holes in the corners for hanging it and imbed loops in the plastic instead, and think about rubber plugs to close the USB port to dust and moisture.But if this is the kind of thing you're looking for, this one definitely gets very high marks. Not the absolute highest, but it's also inexpensive.For purposes like mine I believe it is a consumable item that will have to be replaced regularly, but for most people it would be durable goods. Personally? I'dsay if you're in the market for this kind of thing, buy THIS one.

A**3

Power Hungry? FlexSolar 40W Delivers (But Pair It Right!)

I've tested several portable solar panels in rugged conditions, and the FlexSolar 40W is a game-changer, but only when paired with the right battery. Let's break it down:Renogy E.Flex 10W:Ultralight (11.5 oz), but underwhelming: 0.696 watts/oz.Struggled to charge a 5000mAh battery in Yellowstone, even with optimal sun.Frustrating for demanding use.BigBlue 3:Moderate weight (24 oz), better output: 1.042 watts/oz.More reliable, even in cloudy conditions.Still struggled with heavy iPhone recording use.I feel the panel could be lighter with fabric trim reductions.FlexSolar 40W:Heavier (28.16 oz), but powerful: 1.243 watts/oz.The difference maker, but only when paired with a supporting battery pack.Key Insight:Solar panel wattage per ounce is important when you have to carry it on your back or in your boat all day, but compatible battery bank management is paramount.I have found optimal use occurs with a battery that allows for higher throughput charging. An unnamed Battery bank, that allows for 12V @ 1.5A input, allows for very quick recharge times.Avoid Anker battery packs that lack high-throughput charging.Best Battery Pack for Solar: https://www.amazon.com/dp/B0CJC57PPC?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4&th=1Real-World Performance:With the correct battery, the FlexSolar 40W effortlessly powered a GoPro, multiple batteries, iPhone, iWatch, GPS/satcomm, speaker, headlamp, and more.Even in three days of limited sun, it maintained essential device power.In ideal conditions charging speeds are very impressive.Verdict:For serious outdoor users, the FlexSolar 40W delivers exceptional power and reliability.Yes, it's heavier, but the performance is worth it.Make sure to pair this panel with a battery that can take full advantage of the power output.Finally, use a HIGH QUALITY charging cable on USB-C. No more than 36" long. Look for something like the Anker USB-A > USB-C Powerline II, which uses a lower gauge wire. If you use a cheaper lighter weight charging cable, you are choking the solar panels ability to push power to the battery BMS.Links:*BEST* Unnamed Battery: [https://www.amazon.com/dp/B0CJC57PPC?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4&th=1]*WORST* Anker Battery: [https://www.amazon.com/dp/B07S829LBX?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_10&th=1]*BEST* Flex solar panel: [https://www.amazon.com/dp/B09H6GGK55?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2]*MID* Big Blue 3 panel: [https://www.amazon.com/dp/B01EXWCPLC?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4]*WORST* Renogy E.Flex panel: [https://www.amazon.com/dp/B01K63CO0O?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_6]*BEST* Charging Cable: [https://www.amazon.com/Anker-Powerline-Certified-Samsung-MacBook/dp/B07213D35X?ref_=ast_sto_dp]

Common Questions

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

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Flexsolar 40w Foldable Solar Panel Charger With Usb C Usb | Desertcart Hong Kong