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, and More
- 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 tents. Lightweight and ultra-thin design make it ideal for long treks
- What You Get: Anker PowerPort Solar (21W 2-Port USB Solar Charger), 3ft Micro USB cable, welcome guide, our fan-favorite 18-month warranty and friendly customer service
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From the manufacturer
|Opened Size||26.4 × 11.1 × 0.2in|
|Folded Size||11.1 × 6.3 × 1.1in|
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
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).
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.
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.
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.
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The Anker advantage: join the fast charging technology. The Anker advantage: join the fast charging technology.
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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.
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!
I recommend that you review the accompanying video first. I purchased the Anker PowerPort 21 watt and Aukey 20 watt portable solar chargers within the last week. Neither was provided in consideration for this review.
The test was accomplished on a sunny nearly cloud free afternoon at about 1:30 p.m. Both three panel fold outs were arranged in nearly identical positions on a small table in my back yard. An inexpensive Drok LED USB tester was employed to measure output from both products.
Both products utilize SunPower solar panels, reputed to support conversion efficiency up to 23.5%. Both also include controllers to allow for the fastest possible charging speed up to 2.4 amps to each of two USB ports. Both employ canvas fabric and Pet polymer faced panels with a water resistant design; water resistance was not tested on either unit.
The 1 amp USB port was used on both products. Switching the meter to the other port did not produce additional power. The USB charging cable provided with the Anker product was used on both; a cable was not provided with the Aukey unit.
As shown in the video, the Aukey 20 watt product produced 5.15 volts at 0.51 amps for a total of 2.6265 watts. Power, measured in watts, is equal to voltage multiplied by amperage. While the output from one USB port should be substantially less than that from both combined, the substantially lower realized output is instructive. Both units consistently produced sufficient power to cause my 5 inch Android phone to reflect charging.
The Anker 21 watt product produced 5.11 volts at 0.52 amps for a total of 2.6572 watts. Despite being rated at 21 versus 20 watts, both chargers supplied about the same power to the Smart phone. I strongly suspect that both the Anker and Aukey solar chargers would have charged at a much higher rate had something more than a 5" Smart phone been used. In this regard, the same Smart phone only charged at 4.93 volts at 0.47 amps using the same Drok meter with a regulated power supply running at 13.8 volts into a vehicle USB charging port. That both the solar chargers charged the Smart phone at a greater rate than the regulated power supply would tend to validate the claim of both manufacturers that their solar chargers would charge at the fastest rate safely possible for a given device.
PHYSICAL PRODUCT COMPARISON & CONCLUSION
Both products include metal clips and or fabric loops to allow easy attachment to backpacks or other objects. The Anker uses four metal eye holes whereas the Aukey has four fabric loops and a single metal eye hole. Both have comparably sized storage compartments and use Velcro to secure the foldout panels. Anker includes a red LED between the USB ports to signify charging. The Aukey additionally includes an attached rigid panel sized board for positioning of the panels.
The power output is sufficiently close to nullify that as a serious consideration. Construction and components are also essentially the same. Both appear to be of Chinese design and manufacture.
I believe both were worth more than what I paid for them, although the Aukey cost me $5 less. I did a fair amount of research prior to buying these products and believe both are deserving of excellent ratings. My technical video reviews routinely require at least a couple of hours to produce and I would appreciate a helpful rating if you found it so.
Since some of you might be interested in seeing how the Anker Solar Charger did under a greater load, I placed the panels on the same table about 1:15 p.m., again with a nearly cloudless sky; the temperature was again about 50 degrees. This time, I added a 20 amp NewNow S25 USB storage device to the 5" Android phone. The storage unit is rated at 5 volts at 1.5 Amps input.
With the panels laying flat on the table, the Drok meter registered 4.64 volts at 1.28 amps (5.9392 watts). By lifting the panels more toward the sun, the voltage rose to 4.98 volts and 2.19 amps (10.9062 watts). Only one of the USB ports on the charger was used. The Aukey charger was not tested, but since it employs the same brand, quantity and size panels, I have no reason to believe the results under a greater load would have been substantially different.
POSTSCRIPT - STATING THE OBVIOUS
While there is no simple answer to realized solar panel efficiency, suffice to say that you are much more likely to achieve good results in Arizona than in New England. That is, panels located closer to the equator on a sunny day have far greater potential for producing solar electricity than the same ones closer to the poles. This is a function of radiance, the single most important determinant in panel efficiency. Obviously, radiance is much better on a cloud free day than an overcast one. Just as obvious, panels are also much more efficient if pointed at the sun,
For a much better understanding of solar panels, I suggest you consult UGov.Net, American Home Disaster Preparedness. Understandably, I'm not paid to do this and the site is clearly a work in progress.
Top international reviews
This review is about performance.
I have tried this solar panel for over ten days now. My power banks are 10000 mAh (brand name is Silicon Power) and they have a digital display that tells the charge percentage from 1% to 100%. Anyway, in 10 days, this Anker PowerPort Solar panel has charged only one power bank to 31%. I hooked the other power bank just to see how the charge will go and it was the same as the other one: Only 1% increase on the charge in two hours. It has been very frustrating.
In all fairness let me add that the majority of days have been mostly cloudy and overcast with only a couple hours of good sun every day. I have kept this solar panel in my truck's dash from 8:00 AM to 5:00 PM every day but bring it inside my home every night so it does not get cold. And whenever I got a chance, I hung the solar panel in an angle so the sunrays will hit it directly. Still only 1% charge increase in two hours. I know my power banks are good and they are capable of taking intermittent small currents without discharging back. So no, my power banks are not the problem. I am a Master Electrician by trade and fully understand the works of photovoltaic current. I have tried the best within my knowledge to make it work but I haven't been able to get more than a pitiful charge.
Now, based on my own experience with this solar panel and after reading all the positive reviews about it, my guess is, and I am really hoping that it is the case, that this particular solar panel is defective. Despite my disappointment and frustration, I believe that Anker deserves a chance to make things right and live up to their reputation. I am going to contact Anker and ask them to send me a new unit and try it out for another 10 days. Hopefully the new unit performs as advertised, because I am really in need of a portable solar panel that can provide at least 10000 mAh per day. I am going to be trekking The Himalayas for 3 weeks and I will need to keep my small electronics charged.
I will present another review in the next 3 weeks or so.
Thank you for reading this review.
I did figure out that if I was trying to charge my phone in partial light, the on/off (shadows passing from clouds etc) would drain my phone's battery but this didn't happen with the power bank. I often had it strapped to my backpack while out hiking and that worked great. No issues with time to charge (close to what it would take plugged into the wall).
Only thing I didn't like is if it was hanging from the grommets, the pocket is open to the ground so stuff falls out. The velcro is too short to hold anything in so I'm going to add velcro the whole way like it is on the putter flap.
The storage panel on the end with the usb ports is excellent, I can hide my cellphone inside the panel while it charges. It rolls up small and beautifully when not in use and is a real space saver compared to some solar panels.
Having two usb ports is one of the best features of this solar panel and make it so much more convenient. It charges two phones on a clear day, albeit more slowly than standard power sources. It will even charge my phone a bit on a cloudy day.
However, the 28W BigBlue is less expensive, faster, and will do even better on a cloudy day. I was given it as a gift because I was so impressed and wanted another Anker. The gift giver decided to shake things up and gave me the BigBlue. I still take both camping and wouldn't hesitate to say the Anker solar panel is very good, especially on a very sunny day. If it was less expensive than the BigBlue then it would be a better deal.
Edit: They're sending me another solar charger, so we will wait and see!
- renewable energy
- affordable (compared to some others)
- seems durable
- Very Slow to charge (it would not put a charge on a 20000 mah anker battery at all after 8 hours in direct sunlight, and took about 8 hours to charge up a 5200 mah anker battery to not quite full, from not quite dead in blasting sun.
- Not super light
I wasn't expecting it to keep up with our usage, but it did a fantastic job! Placing it on the top of our tent through the midday sun, or angled towards the sun in the morning/afternoon making sure to always be topping up either of the two backup batteries.
Our phone usage was medium/heavy with google maps, photo uploads and Pokemon Go. Both phones would receive a top up charge twice a day from the backup batteries, with those charged throughout the day from the panel.
I did not test charging both batteries at the same time, despite 2 x USB. Even with Australian summer sun we found that the charge rate on even 1 port didn't sustain 2.4A which is a shame, but not a surprise for such a small panel. We expected this and so weren't dissapointed, but please keep this in mind if you are purchasing expecting to sustain 2 x 2.4A ports for your charging needs.
Take care when charging in full sun, particularly Lithium batteries as they can get hot, try to keep them shaded away from the panel with a short cable (the shorter the better to avoid voltage drop from the panel).
Also, invest in a quality cable, the one that came supplied unfortunately had to be replaced after a couple of weeks usage (also expected and so not dissapointed by this)
Overall, very pleased with this product and looking forward to using it for future trips off the grid.
Usually it works great! Then other times even in full sunlight outside on a clear day, it wont charge anything, the red light wont even come on,but then it works again the next day. I am a bit disappointed, I have owned many Anker products over the years, this is the the first one to give me trouble. Every other Anker product I have ever bought has been amazing, which is why I bought an anker solar panel. Must have gotten a lemon.
I've used several solar panels in the past, and though this is the biggest of them all, its the least klunky and easiest to pack and use. Solar panels typically last me a year, sometimes two. I abuse my items hard in the back woods, so price, weight and durability mean a lot to me. This meets and exceeds my standards so far!
Fast charging in good light, being dumped in a lake proof, survived a few drags and drops. I like the 2 ports so I can charge my power bank and device simultaneously. This thing is so damn simple to use. Point, plug and enjoy my coffee. I really like this and will be buying another to gift to my friends at christmas time for next year!
Pro's: grommets make hanging and pointing in the direction of direct sunlight easy. Large panels for big charging power. Durable. Very Lightweight for the size. Pouch holds my cables well. Folds well in any direction for easy placement.
Con's: one velcro closure on large pouch makes the cables fall out on occasion. Makes me want to bring more chargeable items. Will buy another.