Waste of money, it doesn't perform and sometimes it discharges my power bank. I threw it away after 10 days. No relation to the claimed 2.1 amp, I didn't even measure 1.

In the end, I created another system with a 20W panel, a good MPPT charge controller, a 9 Ah battery, and 2 adapters with usb-A & usb-C each, all inside a plastic container, and it charges the whole group in a free camping site.

Good product, but I consider the 14 Watt to be a bit low in the end. I have combined it with a power bank, with a capacity of 10050 mAh. In order for the power bank to charge from 0% to 100%, it requires uninterrupted exposure to sunlight from sunrise to sunset, which is usually difficult. Note that this applies to the summer. In the winter, it will have much lower efficiency, although it is logical.

In the future, I might consider getting a higher efficiency solar panel, but there might be a problem here: a solar panel that produces high efficiency will also generate high intensity (since the potential difference is always constant at 5V), therefore it will damage the power bank. Depending on each individual's preferences and needs, they can choose what is best for them!

With direct exposure to the sun, it provides 900 mA in March and much better in the summer. It was worth it at 25.90, but not at this price. You can buy a 20w panel with a controller that also has 2 USB ports and a 7.2 ah battery from a motorcycle, and you have a complete and superior system.

I got it in the summer for free camping and I was completely satisfied. I charged 2 mobiles with a 4200 mah battery. Someone writes that it doesn't charge type c, but my type c works fine and charges it. The performance decreases in the winter, but it's natural.

It takes a long time for a device to charge, it requires immediate exposure to the sun otherwise it malfunctions, it is ideal for camping