ALLPOWERS 21W USB Solar Panel Solar Review 

I like your videos chris , always honest , I was looking at the renege 200 watt suitcase panel, good price at the moment .

5:42 I don't think the solar panel shown in this video can put out just 10W. I think that on this panel one USB port can give out such power, and if you load two USB ports of the panel at once, you can probably get up to 14W of power from them in total. As far as I know, this solar panel has two independent USB ports, each of which can deliver up to 10W of power, but both of them will give out a total of up to 14W of power at the same time, which is the usual power for panels of this size.

thanks for the video. but, I have a doubt, if I leave the solar panel at night with the powerbank, does it discharge the battery of the powerbank?

point the fan at the panel