Review on 🔆 Topsolar 20W 12V Solar Panel Trickle Charger - Portable Solar Battery Maintainer for Car, Motorcycle, Boat, Marine RV - Includes Cigarette Lighter Plug & Alligator Clip for Easy Charging by David Plunkett

GOOD: This panel is very thin and delivers advertised performance in sunny weather. I averaged 14.1V at 1.24A all day. Enough to keep my SUV's battery from draining when not in use. The accessories that come with it are very versatile. In addition, the reverse current blocking diode basically prevents discharge at night. I say mainly because the green LED is lit and if you are using a cigarette lighter adapter it has a red LED which is also lit. These two LEDs draw about 0.08 amps, so there is VERY LITTLE discharge at night. POTENTIALLY SERIOUS FAILURE: This may be an isolated case, but in my case when the panel is connected to my SUV, the key fobs do not lock/unlock the doors. I think the charging circuit somehow interferes with the car receiver. Unfortunately for me this means that I could not use it for its intended purpose.