Solar Panel, Anker 21W 2-Port USB Portable Solar Charger with Foldable Panel, PowerPort Solar for iPhone 11/Xs/XS Max/XR/X/8/7, iPad Pro/Air/Mini, Galaxy S9/S8/S7/S6

(10 customer reviews)

Price: $69.99

The Anker Advantage: Join the 50 million+ powered by our leading technology
Fast Charging Technology: PowerIQ delivers the charging speed up to 2.4 amps per port or 3 amps overall under direct sunlight. 21 watt SunPower solar array is 21.5-23.5% efficient, providing enough power to charge two devices simultaneously
Incredibly Durable: Industrial-strength PET polymer faced solar panels sewn into a rugged polyester canvas offer weather-resistant outdoor durability
Highly Portable: Compact size (11.1 × 6.3in folded or 26.4 × 11.1in opened) and stainless-steel eye-holes on each corner allow easy attachment to backpacks, trees, or

Brand Anker




Opened Size 26.4 × 11.1 × 0.2in
Folded Size 11.1 × 6.3 × 1.1in
Lightweight 14.7oz

Anker PowerPort Solar

Charge with the Power of the Sun

From ANKER, America’s Leading USB Charging Brand

– Faster and safer charging with our advanced technology

– 50 million+ happy users and counting

Off-the-grid Power

When you’re out enjoying the great outdoors, enjoy another perk: free limitless power. Simply spread out the solar panels or attach to your pack to start recharging your gadgets.

Fast Charging Technology

Exclusive to Anker, PowerIQ discovers and replicates your device’s original charging protocol to provide its fastest possible charging speed up to 2.4 amp per port or 3 amps overall (with enough direct sunlight).

Superior Portability

Compact design and rugged stainless-steel eye-holes on each corner make attaching it to a backpack or tent a cinch. Super lightweight and thin , it easily fits in a daypack.

Incredibly Durable

Industrial-strength PET plastic faced solar panels sewn into high-wear polyester canvas ensure it’s able to withstand the trials of your outdoor adventures.

Advanced Safety

Short circuit and surge protection technology keep you and your devices safe.

For Optimal Use:

• Ability to charge your device dependent on sufficient sunlight.

• While the polyester canvas provides some water protection, we recommend minimizing moisture exposure to protect electrical components.

Compatible with Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices except for the iPod nano, iPod Classic, HP TouchPad and Asus tablets.


This charger is not compatible with the iPod nano, iPod Classic, iPod Shuffle, HP TouchPad and Asus tablets.

Not a battery. Does not hold its own charge.

May only charge in direct sunlight.

Additional information



10 reviews for Solar Panel, Anker 21W 2-Port USB Portable Solar Charger with Foldable Panel, PowerPort Solar for iPhone 11/Xs/XS Max/XR/X/8/7, iPad Pro/Air/Mini, Galaxy S9/S8/S7/S6

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    This thing is really saving my tail here in Puerto Rico after hurricane Maria. Bought it after Irma only to have it arrive the day I regained power. Little did I know big sister Maria was lurking.I have used it every day to charge my Anker battery (the big one I forget which size) and a mofie case for my iPhone 7 red 120GB. On a sunny day I can charge my phone twice or more fully. On a rainy day, maybe once or less. I would not recommend leaving it in the rain. It has gotten damp from time to time or soaked in tropical rain storm momentarily. Works fine although the rivets immediately rusted. I also love 10 feet from the ocean in northernmost San Juan. So salty to be fair.I do wish the pocket that holds the devices being charged were a little more hefty and durable. And that they would close completely with say a HEAVY duty zipper (military grade).Otherwise this has been one of the best purchases I have ever made. It let me have communications through almost all of this (or once google started floating project loon). Kept me connected to information, family, news. I’m so glad they developed this tech. What an amazing age we live in 2017, despite everything!

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    GTSD 942

    I take this thing everywhere. It usually stays on the counter so I don’t forget it. I have solar batteries, they do OK, but this is the real deal. I went on a weekend camping trip in the woods with 15 other people. Not at a state park, out in the woods. This was the only power source out there and it was the talk of the trip. Constantly charging phones even in overcast and 2 at a time didn’t slow it down much. It can be hung from a pack so you can charge while you walk too. The only thing it doesn’t like is when I tried to charge an iPhone 6 in a Lifeproof case with the built in extra battery.I want to get a high cap non-solar battery pack and see how this thing does charging it…THAT would be an awesome duo if it works well (I’ll let you know with an update once my wife lets me buy one.) Solar batteries are great if you can find a decent one because you can use them any time but every one I’ve bought is crap. This is a great buy if you can remember to plug in while the sun is out but even if you forget and it goes dead overnight, in direct sunlight this thing charges FAST. Great buy for the money, you won’t be disappointed.10/10/16 update:So I bought a 26,800mAh Anker battery pack with no external solar panel. I plugged it into this solar panel on a good sunny day and charged it to 75% in one afternoon. Then I decided to try to plug this panel into my solar battery packs to see how that worked. My 10,000 mAh solar battery pack charged to 100% in less than a day. That would have taken 3-5 days on its own in constant direct sun. I agree that sometimes overcast will affect the output of this panel which is what was happening when I said it didn’t work so well with my LifeProof case. It works fine when the sun is bright. My initial assessment was too forgiving in that respect. Additionally my statement that the solar batteries I’ve bought were crap wasn’t fair either. I expected that the little solar panel built in to the battery packs would have charged them much more quickly than they did. Those are last resort ways to charge the batteries, and in time they do work well. I’m just impatient. Critics of this panel need to remember it is a SOLAR PANEL so it obviously works best in direct sunlight. Get some battery packs and charge them with this thing, save the suns energy for when you need it. Bad ass solar panel, I’m totally impressed.10/22/18 UPDATEI bought this solar panel for about $65 a couple years ago. HOW IN THE HELL IS IT TWICE THE PRICE? I won’t buy Anker again until they get real. I can buy a 100W panel at Harbor Freight for about the same price with the proper coupon.8/2/20 UPDATEThe price is back down to $70 and I bought another one of these solar panels a couple months ago even though my first one still works as good as the first day I got it. There are 2 USB charging ports on each solar panel which means I can toss both of them out and charge both of the Anker 26,800 battery packs with 2 USB inputs each, it cuts the charging time by about 30-40% depending on how bright/direct the sunlight is.Look this up: is the link to this panels best friend.

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    It works. I tested the Anker 21W USB Solar Charger with the Anker 20100 PowerCore, and with Apple iPad Air 2. All tests were run with a single device (i.e. only one USB output was in use.) For comparison purposes, I also tested with the 12 W Apple 110V AC -> USB wall charger. Current and voltage measurements were made with the DROK USB 2.0 meter, in-line between the power source and the device to be charged. Solar panel testing was done at mid-day, under clear skies, with the panel oriented for maximum solar exposure (toward the sun and at about 40 degree angle from horizontal)..The solar charger delivered 2.12 A at 5.02 V (10.6 watts) to the PowerCore, and 2.31 A at 4.96 V (11.4 watts) to the iPad. The Apple wall charger delivered 1.98 A @ 5.05 V (10 watts) to the PowerCore, and 2.12 A at 5.06 V (10.7 watts) to the iPad.I also tested PowerCore to iPAD, which delivered 2.35 A at 5.06 V (11.9 watts).Note that this Solar Charger is specified to deliver up to 2.4 A at 5V with one USB port, up to a total of 3 A at 5V with both in use. I’ve read elsewhere that this 15 W maximum deliverable output is a limitation of the USB chip. You will not get 21 W delivered power. This PowerCore is specified to accept input power of up to 2A at 5V, i.e. 10 W. I was not able to find an input power specification for the iPad Air 2. For reference, the battery capacity in the PowerCore is 20,000 mAh (72 watt-hours), and the iPAD Air 2 has 7340 mAH (26 watt-hours).I also tested the Ikea USB LED light. This small light yields 10 lumens (not a lot), but only draws 0.26 W, so would run over 200 hours on the PowerCore.Conclusions.The solar panel will meets its designed 12 W output from one USB port. The PowerCore will accept, and in fact exceed, its designed 10 W input. The PowerCore will deliver its designed 12 watts outputs (at least to a an IPad).A rule of thumb for solar panels is that per day you get about 5 x max power, so this panel might be expected to yield 40-50 watt-hours / day, if it was run all day with some care. That’s enough to provide 55-70% of a PowerCore charge.Use of the solar panel is quite technique sensitive with respect to proper alignment to the sun. Something like the DROK current and voltage meter is almost required to ensure the panel is operating at maximum potential. Power also drops off very rapidly out of direct sunlight, and significantly if not angled for maximum sun exposure (i.e. flat on the ground). I would probably run the panel into the PowerCore, and use that to charge phones or tablets, simply because the PowerCore is less sensitive to breakage from getting dropped at the panel is moved around, but the PowerCore is not required to use the solar panel.My primary interest in the solar panel is as an emergency backup power source. This meets my requirement for a small, lightweight solar panel that would provide enough power to keep phones and tablets going. It and the Ikea USB LED are going into the Hurricane Box. Its cheap insurance.P.S. A comment on the 21 W panel vs.15 W delivered power. I think this is a reasonable design choice, given the sensitivity of panel output to operational technique, but it took me a bit to realize what to actually expect. What you are really getting here is roughly the 10-12 watts you would get from the Apple USB wall plug, which is quite good, but its not 21 usable watts. I think Anker could have made that a bit clearer.

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    I wondered why my Anker PowerCore 20100 power bank would never charge from this solar charger, but would charge from a wall charger. So I performed some tests and found that if a cloud passes then the 20100 will drop to a trickle charge for the rest of the day. The 20100 dynamically reduces its charging current draw, but does not increase it.For example, if the sun is out the 20100 will charge at 2.0 Amps from this solar charger. If a cloud passes and the solar charger can only produce 0.25 Amps then the 20100 will reduce is current draw to 0.25 Amps (as it should). However when the sun comes back out the 20100 will still only draw 0.25 Amps, even though more than 2 Amps are available. This was verified using both the YZX Studio ZY1266 USB power monitor and the Drok Pocket Digital Multimeter.Anker support said the 20100 power bank was defective. I replaced it with a second one that behaved the same. I tested my older out of production Anker batteries: the Astro 3E also doesn’t increase its charge rate, but the Gen 1 Astro E5 does. The E5 immediately responds when the sun comes back out and draws all available current from the solar charger. I again contacted Anker support and asked for a list of batteries that have been tested with and charge properly from the Anker solar charger. Anker could not produce anything so I was on my own.I purchased some other batteries to see what would work.The EasyAcc Monster 26000mAh Power Bank worked properly. Plus this battery has two charging ports so it can connect to both solar output ports and charge at greater than 2.0 Amps when enough sunlight is available.The Anker Astro E7 26800mah Power Bank works perfectly with the Anker solar charger.The RavPower 26800mah Power Bank works properly in almost all conditions with the Anker solar charger. However if the sunlight drops too low and the charger produces close to 0 ma, but then the sun comes out before the solar charger powers off, the RavPower would not charge anymore. None of the other batteries had this particular problem. I also have the ChoeTech 19W SunPower Solar Charger so I tried the RavPower with it and found that the ChoeTech will reset the USB connection within a few seconds of this happening. So the ChoeTech/RavPower combination works fine. But if you use the RavPower with the Anker solar charger you might come back to your battery at the end of the day to find it didn’t charge.

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    I used my galaxy s7 edge to test this charger. At first I was nervous because I was using the usb cable it came with and it only charged 2% in 20 minutes. So I switched my own usb cable and saw the difference instantly. I was on my porch and it got cloudy and charging estimated time was 3+hours. When the sky cleared out charging time changed to 2+hours. Then I moved the charger to my bedroom window and apparently the Sun hits better there becuase charging time changed to 1+hours. Phone was charged 100% within estimated time. I love this thing! I’m sending it to my parents in Puerto Rico. After hurricane Maria hit they still have no power and this will be extremely useful to them.

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    Dan or Adrienne

    This works great!!I tried it out in the window on an overcast day and got poor results. The items I would try to charge would show charge for 10 seconds or so, then show charging off for about the same and repeat over and over. This resulted in losing power overall as the screen had to keep turning on.I set it outside on a table on an overcast day, and had a steady charge to my Samsung Note 3, about 10% an hour.When the sun was shining brightly, I was able to charge 2 Samsung Note phones at the same time at about 15% an hour.In my opinion, this is a good value for the money.(The item I’m reviewing is the 21W 2-Port PowerPort. I’ve seen how Amazon likes to generify the reviews to cover multiple similar products. Not cool, Amazon.)

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    Outdoor Nut

    I am not an expert when it comes to solar panels. I can only talk about my experiences with this product. As with all products I buy on Amazon I thoroughly check out all the reviews. Good and bad. I also check on YouTube to see if anyone has written a review on the product as well. First thing I notice in some of the reviews on Amazon was that people had a hard time charging the Anker 20100 mah power core with this solar panel. That is the power core I have and why I wanted to get the solar panel. I enjoy the outdoors and wanted a way to keep my power core changed and hence, all my toys that I have for hiking and camping. It seems clouds cause the 20100 power core to drop down to a trickle charge and stays there even if the sun comes back out. People had to unplug and plug it back in for it to resume a full charge. I kept reading the reviews and someone found that the Anker 26800 mah dual inport charge power core does not do this and will resume a full charge when the sun comes back out. I also checked the reviews of this solar panel out on YouTube which has several. There was one review that really sold this solar panel for me. It is called, “Anker vs ….”. I’m not going to put the other solar panels manufacturer here but I’m sure you will find it if you look. This guy really put these things through a lot more then anyone will ever do to them. The competitor’s solar panel only had two panels to the Anker’s three that I thought was a little unfair. Other then that, his test was fair across the board. He through them around and tossed them from a height of 20 feet. Left them out in a rain storm and through them both in a pond. He then lite a fire to dry them out that I was sure was going to melt them. He stomped on them and dropped a ten pound rock on each of the panels. His review is what sold me on this solar panel. So, I bought a the Anker 26800 power core and 21W solar panel together. I have not tested this panel out but two times. Both days were cloudy with some sun. Each time I angled the solar panel torward the sun to get the most of it and left it to charge the power core. The first day was more cloudy then the second. On the first day my power core was down to one light and I charged it for about 6 hours. It had three lights lite up at the end of the test which is a charge of 50 to 75 percent to the power core. The second time I charged my power core it was back down to one light again. This time there was a little more sun but over that time became more cloudy. I only charged it for 4 hours this time. See picture of clouds from the start of my second test. In this time it went from one light to two lights on my power core. The best I can figure is that is a 25 to 50 percent charge to the power core which only has 4 lights. So with the two tests done on cloudy days, as close as I can figure, that is an average of about 12 to 25 percent charge to my power core every two hours. I think that is pretty good but like I said before, I’m not an expert. I have two lights on now which is somewhere between 25 and 50 percent charge on the power core itself. I am waiting for an all sunny day to see if I can charge it up the rest of the way so the power core is fully charged. At which time all four lights should go out indicating the power core is fully charged. I will update this review when I have completed this last test. In all, I am very satisfied with this solar panel.Update-I just finished charging my Anker 26800 power core with the solar panel. It was a clear sunny day. I angled my solar panel torward the sun and started charging my power core at 8:30 in the morning. It had two out of four lights lite when I plugged it into the solar panel and the second light started flashing on my power core letting me it was charging. It took 6 1/2 hours for the power core to be fully charged. Over that time I adjusted the solar panel’s angle twice. As far as I can tell the power core charged anywhere from 50% to 75% in that time frame. That is still an average charge of about 25% every two hours. Not a big change from the two cloudy days before. This is a huge power core and I have not drained it in any less than 3 days. I charge my spotlight, headlamp and, my iPhone 5s from this power core. I have also run my two camp lights that are 100 lumens each overnight for about ten hours and they did not even use 25% of the charge from my power core. See picture of the things I have charged. I am very happy with how well this solar panel preformed. It does not seem to have any trouble charging my Anker 26800. I do not see myself running out of juice to power my toys on multi day hiking and camping trips. In order for that to happen, I would have to have no sun for 3 or 4 days. But, this solar panel seems to have the ability for a slight trickle charge on completely overcast days. I will try that next to see how well it works. I may have to limit my use of some things but I don’t see myself running out of power completely. This solar panel has preformed beyond my expectations and I am very happy with it. If I ever need more then one, this is the one I’m going to buy.

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    nicole hernandez

    I’ve used this on 4 separate backpacking trips through backcountry; each trip ranging from 3-6 days. I’ve been able to keep a steady charge with this solar panel consistently. Very sturdy, works great, love the pocket where the usb go, u can put phone or cords in while charging… u can even clip to pack while trekking and get a charge that way if your on the move… all in all I’ve had no issues with it.. so worth it

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    Pastor Sasquatch

    This solar power supply is great. I got it for my birthday because I go camping often with Boy Scouts in places with no power. (And when there is power, all the assaults fight over the ports to charge our phones.) but now I have the upper hand! It charges my iPhone 6s and my lg g-pad. In a half hour, with slightly hazy skies, it took my iPhone from 50% to 70% charge while adding 6% to my lg g-pad tablet.I have been using this charger for a year of Boy Scouts camping now, the other leaders see me pull it out and hand me their phones. I have charged 2 iPad mini’s at the same time with this in a clear bright day. Sometime on my lunch break, when my phone gets low, I pull this out and plug my phone in while I relax in my car. I have noticed at recent camp outs, the other Boy Scout leaders pulling their own solar panels out of their cars to charge their phones, but mine works better. They all went with cheeper models but they do not work as well!

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    Allyssa Gregory

    Bought it for camping in Wyoming away from civilization. It does a great job!Using a drok usb meter I’ve found that as long as you have direct sunlight of any form you can pretty much expect to pull at least an amp from it. I generally get around 2-2.8 amps in good sun but during peak sunlight I’ve hit 3+ with multiple devices connected.The smart feature that restarts it automatically if sunlight is interrupted is a big highlight for me. I typically leave it out in the sun and have a 6ft USB cable running to my 10kmah battery pack that I keep in the shade nearby because hot batteries make me nervous. This setup kept my phone and GoPro batteries charged on an 8 day trip with partially cloudy skies!I did have one day that it got rained on a little, just a light shower for about 15 minutes and I wasn’t around to bring it to shelter. It survived and was still charging when I got back from my hike, which of course made me very happy.Survived airplane flight in checked bag as well as time in a backpack hiking. Highly recommend.

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