The main thrust of your text is showing the realization about the core problem with solar, that is mostly useless for most problems relative to a charged powerbank. Solar makes little point on size and weight reasons on shorter trips, and becomes less useful the smaller they get. The next model up from Anker is 21W.

PowerPort Solar Lite 2 - Anker US

Why did you buy the Powercore 20100? You describe the use of tearooms and mains power whilst there, well then you’re looking for fastest recharge. The 20100 has one of the worst recharge / mah of the Anker product range. Two Powercore 10000 would recharge twice as fast in total than one 20100. Or the Powercore II 20000, or the Powercore 26800, or… (QC or USB-C, etc). This solar panel is compatible with most cell phones including the iPhone, Samsung, Mp3 players, GPS units, Gopro cameras, etc. Nearly any smaller form factor device that connects to a USB can be charged. Also, the solar panel can charge two devices at the same time which can be convenience if you have multiple electronics that need to be charged.

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I have to say although I did manage to get the gist of what you said I am really not very techy when it comes to some of the V & Watts language and calculations. and for someone like me as a layperson, some of it is a bit over my head. Other than the technology used to make the solar panels themselves, you’ll need to think about a few other things before making your final decision: Output Power Given what you say, I think probably your solar panel is at fault. The reason is you said neither the Powercore nor your iphone show a charge input, given its 2 devices with 2 cables, by elimination is probably the solar panel fault. Best For: Pretty much everyone, this is the most widely available tech for a reason, simply because it’s the best choice for a solar charger that you want to take outdoors. Polycrystalline in full strong sunshine (it only takes a modest overcast to drop such a small 15W panel below the threshold for most devices to charge)

Anker 513 Solar Panel (21W) - Anker Europe

Though the Anker PowerPort Solar Lite’s measured average (6 watts/1.17 amps) was less than the 15 watts/2.1 amps advertised in the specs, it peaked at 8.48 watts/1.67 amps in direct winter sun, and that real-world performance was in line with the best of the competition. After filling up from the PowerPort all day, our test battery discharged only 15 per cent less power than the battery powered by the much larger and heavier RAVPower charger. The top performer was the Anker Powerport Solar 21W which managed to give the RavPower enough for two full charges of the Galaxy J6. The 7 others were all just slightly behind. Based on our testing we think you’d need around 12 hours of strong sunlight to fill a 10,000 mAh power bank which won’t be a problem in many parts of the world, but in the UK? Not very likely!That is a fantastic reply and I do appreciate you taking the time to write it. I am sure it will help not only me but many others reading it behind me. On a size/weight basis, assuming everything worked perfectly, the Powercore 20100 would hold 12 hours of sunshine. ( 20100/1700 = 11.8) It weighs 12.6oz. The Anker 15W weighs about the same (right? Put these on scales). In perfect conditions you’d need 2-3 days of sunshine to get the same energy as the 20100. Do you need 2-3 days worth of 20100 charge more than the 20100 can carry in itself? Well mostly not, you’d need to be off-grid for a week or so before solar makes any sense. And then if you were off-grid for >1 week you’d be better off with a bigger solar panel on a Watts per weight basis. You’d be better off with a group of people and between the group having a bigger solar panel, then the sunshine is much less likely to drop below the threshold voltage of your devices, i.e. it is useless less often. BigBlue makes some of the most popular solar chargers, and this model is the ideal choice. You get plenty of power, great amperage, and a digital readout so you can see exactly how many amps are going into your device. It’s got two charging ports, and comes with metal hooks included so you can easily attach the panel to your bag or a tree to allow for easy charging. Monocrystalline solar panels are much more rugged than CIGS panels, so they’re much more suited to being outside. They’re also heavier than CIGS panels though, but despite this, they can still be bent and formed into different shapes. They’re also the most efficient tech, getting around 22% efficiency. Most portable chargers you see will use monocrystalline panels. buy the Powerport2 and two Powercore 10000. These would collectively recharge your Powercore twice as fast when you do come across mains power. Two Powercore 1000 weigh the same as one Powercore 20100, and recharge twice as fast, if one of them fails you still have the other. The Powerport2 outputs 4.8A which is enough for full speed recharge of two Powercore 10000.

Solar Charger, Anker 24W 3-Port USB Portable Solar Charger Solar Charger, Anker 24W 3-Port USB Portable Solar Charger

A full 10,000 mAh power bank should be able to charge the phone fully three times. But could any of our solar chargers generate enough power to fill a 10,000 mAh power bank during a 12-hour walk? The answer was no.

Entertainment We spend hours watching and reviewing the latest movies, shows and music releases so you don’t have to. buy the biggest solar panel possible, the reason being in less than idea conditions, a bigger panel output will be more likely to be above the required minimum threshold of your devices.

Anker Powerport Solar 60W-Black - Anker Kuwait Anker Powerport Solar 60W-Black - Anker Kuwait

Gaming Let expert reviewers guide you on which games to play. From consoles to RPGS and shooters, we’ve got it all here just waiting for you to read. The Anker PowerPort 21W solar charger is very durable. It uses industrial-strength PET polymer faced panels that are sewn into a rugged polyester canvas. The canvas offers weather resistance. I did not have the opportunity to test the panels in the rain but I am sure they would hold us just fine. However, I suspect they would charge much slower in overcast rainy conditions. As the phone gets hot, it defends itself by not ingesting as much power, so in the same situation the solar panel is working well, the iphone will respond badly.However, I’m starting to get a bit frustrated now! I have my 20100 charging from my PC and at present it is charged up to 50% and flashing away continuing to charge up to full. So it’s at two blue dots. All good. The Anker comes with an 18-month warranty. If you are in the market for a solar charger this one is top shelf! If you are doing all of those then the Anker 15W panel should be recharging an iphone at about the same speed it the iphone would charge off mains power (e.g. off Powerport2). If it is not, then eliminate the cable as cause, then if not then its probably the solar panel’s fault. When we’d got our preliminary list it was time test the products for real. Based in Yorkshire with some fantastic hikes and walks a stone’s throw away we know a thing or two about the great outdoors. The only issue in late September would be the Sun but thankfully during our testing weekend, we got clear blue skies and reasonable levels of sunlight. The panels themselves are super efficient, and the device comes with hooks so you can easily hang it on your bag to catch the sun during the day. It’s rugged and durable thanks to the high-quality base material. And you get a short circuit, overcharging, and power surge protection too.