Top positive review
Great Panel but READ BEFORE BUYING
Reviewed in the United States on March 16, 2020
It’s a nice panel BUT if you’re going to charge a car battery with it, read this. It uses some power from the battery when there is no sunlight. Using the ammeter on my multimeter, the current is positive when the panel is in the sun (battery is charging) but negative when the panel is not in the sun (battery is being drained). It’s only discharging at about 3 mA so I think it’s only the little green LED on the back of the panel using power. Also the cigarette lighter plug that comes with it has a red LED on it that stays on even when the solar panel is unplugged which uses some battery. Now before you decide not to buy this, know that the amount of power 2 little LEDs use is insignificant compared to how much power the panel collects each day but just to let you know, the battery does discharge slightly overnight. I wish the LEDs wouldn’t light up when there’s no sunlight. It’s still a great panel. My battery now starts the car quicker now that it’s topped off every time I start. I also use this panel to charge a power wheels battery for a portable solar power bank. Only other downside is the panel gets very hot sitting in the sun but it looks like they make a 20 watt one with a white backing that should stay cooler.