It’s solid. On the bright sunlight it charges two devices with 2.3-2.4 amps. Good enough to recharge two 10000 mah power banks within several hours. We took it to Yosemite and it did the job. I didn’t take it on the hike, not sure it would work well when attached to the backpack - the angle of the sunlight wouldn’t be good. Works perfectly if you leave it in the camp though. While we were hiking it was completely recharging our power banks.
The main con is that if one of the panels is in the shade, the charging is closed to zero. The second one is that the pocket for the device is not insulated and, well, it’s black. So if you put your smartphone there, it will be overheated within a few minutes and will stop charging. At first I think it didn’t work properly though, so here a few tips that I’ve figured:
1. All the panels must be exposed to the sunlight. Even a small shade on the panels affects efficacy dramatically.
2. It’s better to use with powerbanks rather than charge your phones/tablets/whatever directly.
3. Whichever device you are charging, keep it off the sun. The pocket on the solar panel itself doesn’t work at all, and if your device has any overheat protection, it will stop charging pretty soon. If it doesn’t have a protection, it can just explode if the sun brights really hot. I was putting the solar panel on a camping chair with insulated pocket for a cold drinks and putting my power banks in the pocket. Works pretty well.
4. If the sunlight is good, there is no need to try to sustain the good angle (the closer sun rays fall to 90 degrees, the more power the panel will generate). But if it’s not very sunny, try to put something under the panel to keep it directed towards the sun.
With that, I think it’s a pretty good solar panel, if you know the above and understand how to use it.
Be safe outdoors!
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Solar Panels Charger with Digital Ammeter, BigBlue 28W SunPower Camping Solar Panel, Dual USB(5V/4A Overall), IPX4 Waterproof, Compatible with iPhone 13/11/Xs/X/8/7, iPad, Samsung Galaxy, Google Pixel
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BigBlue 28W Solar Charger with Ammeter and BigBlue 10W ETFE USB-C Solar Panels with IP65$94.98 $106.95This bundle contains 2 items
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This Item  BigBlue Solar Panels Charger with Digital Ammeter, 28W SunPower Camping Solar Panel, Dual USB(5V/4A Overall), IPX4 Waterproof, Compatible with iPhone 13/11/Xs/X/8/7, iPad, Samsung Galaxy, Google Pixel |  |  |  |  | ![[Upgraded] BigBlue 3 USB Ports 28W Solar Charger(5V/4.8A Max), Portable SunPower Solar Panel for Camping, IPX4 Waterproof, Compatible with iPhone 11/XS/XS Max/XR/X/8/7, iPad, Samsung Galaxy LG etc.](https://m.media-amazon.com/images/I/41gVrkEOUHL._AC_.jpg) | |
| Price | $69.96 | -40% $35.99 List: $59.99 | -38% $49.99 Typical: $79.99 | $89.99 | $79.99 | -9% $72.99 List: $79.96 |
| Delivery | Get it as soon as Thursday, May 16 | Get it as soon as Friday, May 17 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 |
| Customer Ratings | ||||||
| Charging power | ||||||
| Light weight | ||||||
| Value for money | ||||||
| Durability | ||||||
| Sold By | BigBlue-US | KTenergy | FlexSolar | Lumopal | SinKeu US | BigBlue-US |
| power source | Solar Powered | Solar Powered | Solar Powered | Solar Powered | Corded Electric | Solar Powered |
| connector type | USB Type A | USB Type C & USB Type A | Usb, Usb Type A | USB Type-C，USB -A, DC | DC-to-DC Cable, USB | USB Type A |
| material | Monocrystalline Silicon | PET laminated monocrystalline | Monocrystalline Silicon | 23.5% High Efficiency Monocrystalline Silicon | — | Monocrystalline Silicon |
| wattage | 28 watts | 30 watts | — | 60 watts | 40 watts | 28 watts |
| weight | 595 grams | 2.43 pounds | 1.5 pounds | 3.4 pounds | — | 671 grams |
From the brand
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About Us
BigBlue was founded in 2007. Since we were founded, we have been committed to developing energy storage products with better performance, newer design and higher safety factor.
BigBlue is aimed to "Clean Safe Fast Energy" for people, making green and clean energy available everywhere. In this way, we hope to provide enough electricity to households in power-poor areas and promote development.
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BigBlue Power Supply
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CellPowa 2500 with Panels
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CellPowa 1000 with Panels
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CellPowa 600 Power Station
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CellPowa 1000 Power Station
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Stay Charged Anywhere
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Best Off-grid Power Kit
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SolarPowa ETFE Series
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Product Description
BigBlue Power Station with Solar Panels
 CellPowa 2500 |  CellPowa1000+SolarPowa150 |  CellPowa600 |  SolarPowa150 |  SolarPowa200 |  SolarPowa400 | |
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Customer Reviews
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21
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26
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26
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5
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2
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Price
| $899.99 | $599.99 | $299.99 | $299.99 | $349.99 | $599.99 |
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Power
| 1843Wh | 1075.2Wh | 537.5Wh | 150W | 200W | 400W |
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Folding Size/Dimension
| 15.1 x 10.8 x 12.8 in | 13.4 x 8.8 x 10.5 inches | 11.46 x 8.5 x 7.99 in | 23.9 x 30.6 x 1.2 in | 25.67x 20.94x 1.96 in | 25.7x 38.8x 1.8 in |
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Net Weight
| 55.8lbs | 31.97lbs | 17.2lbs | 12.32lbs | 15.4lbs | 29.98lbs |
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No. of Output Ports
| 15 Output Ports | 13 Output Ports | 9 Output Ports | MC4 Connector | MC4 Connector | MC4 Connector |
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Max. Output Power
| 2500W AC. 5000W Surge | 1000W AC, 2000W Surge | 600W AC, 1200W Surge | 24V/6.26A | 52.8V/3.78A | 51.3V/7.8A |
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Waterproof Level
| N/A | N/A | N/A | IP68 | IP68 | IP68 |
Videos
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The One Thing To Know about this Solar Panels Charger!
Orion Studio
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Nature's power in your hands so you can stay connected
Mike Lazarus
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6:12
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Should You Buy? Bigblue 28W Solar Panel Charger
Should You Buy?
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1:34
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Solar Panels Charger with Digital Ammeter, BigBlue 28W
Meet Marco
Reviews with images
I love this charger (BigBlue 5V 28W with readout) I use ...
I love this charger (BigBlue 5V 28W with readout) I use this to charge multiple battery packs and it is wonderful. I have charged my phone off of this all year so far. I bought a usb multi meter to check voltage. The voltage is regulated well and I have never seen it go above 5.1V. The lowest voltage I have seen on a cloudy day was 4.9, still well within range to charge my battery pack. I live in AZ and get plenty of sun. My battery packs are always charging at max input because this charger has so much power available. I built a stand which I set the solar charger on. The stand can change angles so it can be aimed for the best angle. I have used this to go camping and never needed to plug into the grid to power anything within my camp site. I truly can’t say enough good things about this charger.1 year update. 12/27/18Still as strong as the first day I received it. The fabric has faded however, that’s to be expected with as much use as this gets. The Arizona sun is relentless and will fade any fabric. I have used this solar charger to run all of my USB devices and I only need to use it every few days when paired with a proper battery bank. I am now using this charger to charge a ~26,000 ma battery bank (Anker). I charge at 4A and the pack is charged fully within 6-7 hours. This battery lasts my Wife and I 5 full days with both of our phones (3 year old iPhones) from dead to full charge. Even in December, I am able to pull 3.9 A at about 11:00 AM. If you are looking for a great product to help get away from the grid for any reason. This is what you will want. It has plenty of power to charge almost anything USB you can think of, especially when you pair it with a good storage bank.Update: 3/18/2023Still working great! I have used this hundreds of times by now. Even being over 5 years old, it still puts out 4 amps. My cords are the limiting factor. I still take this with us everywhere. When we’re camping, we never need to worry about our USB powered devices going dead. I always have this charging several battery banks to ensure we are good to go. We truly enjoy this solar panel and have recommended it several times over to friends and family.One thing to note, as with any fabric, the color will fade with the sun. So it does not look “pretty” and new any more, but I think of it as a battle scar and how many good times have been had because it sat out and baked in the sun!
Top reviews from the United States
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Reviewed in the United States on September 7, 2022
Reviewed in the United States on April 24, 2024
Reviewed in the United States on June 27, 2019
So this is my third solar panel. I had a Renogy 100w panel on my van. It worked flawlessly. Then I purchased a Suakoi 24 watt panel like the Big Blue . It worked perfectly fine until it was stolen. So then I purchased this Big Blue because it was rated up to 4 amps output and had the built-in amp meter. I use it to charge my powerbanks when I am camping out. (which is all the time). So far I'm thrilled with it. I camp in the pacific northwest where the sun is usually fighting with the clouds so I wanted something that charges faster than the other brands. It has not let me down. It will charge my Galaxy S9+ in less than 2 hours if the sun is shining (about the same if I plug it into the wall charger) or about 4 hours if it's really cloudy. And it always works when it is cloudy. It will charge my 10,000ma powerbanks in about 4 hours when it's sunny.
The most output I've seen is 3.5 amps but I'm sure it will do the full 4 amps if you have the right stuff. I have noticed that the quality of the cables makes a difference. I hope this one doesn't get stolen because I'm really happy with it!
I had 2 Ravpower powerbanks hooked up to Big Blue and when the sun came out of the clouds the ammeter climbed up to 4.5 amps. Pretty awesome.
The most output I've seen is 3.5 amps but I'm sure it will do the full 4 amps if you have the right stuff. I have noticed that the quality of the cables makes a difference. I hope this one doesn't get stolen because I'm really happy with it!
I had 2 Ravpower powerbanks hooked up to Big Blue and when the sun came out of the clouds the ammeter climbed up to 4.5 amps. Pretty awesome.
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Top reviews from other countries
Muy buen producto!, carga muy bien y es muy buen super recomendado!
Exelente
Reviewed in Mexico on February 25, 2024matt m.
Comes As Advertised
Reviewed in Canada on February 20, 2024
matt m.
Reviewed in Canada on February 20, 2024
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