Two USB Output Ports Solar Charging Panel USB Interface Battery Charge for Home/Outdoor Camping Car Waterproof Solar Emergency Charger
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Quite a good panel, working, in terms of power it gives out about as much as the panel I have, which is slightly larger. I connected them together, charged two batteries through the controller, one for electric transport through a plug, the other gel. In cloudy weather it charges slowly, it can even stand for several days, in sunny weather in a few hours. During cloudy weather the battery should be disconnected, especially if it does not have a reverse flow switch for discharging, because then it itself works as an energy consumer at night. Also note that in hot weather, if you use it indoors, it is undesirable to put it close to the window glass, since it overheats very much, so keep it at some distance from the glass, or better at an angle, then it also catches the light better.
