POWOXI Solar Panel Kit 12V 20W Magnetic + MPPT Charge Controller Waterproof Solar Battery Charger Maintainer Solar Trickle Charger Alligator Clip for Car Boat RV Motorcycle Marine, etc.

I purchased one of these previously and installed it on an old Oliver tractor. Easy installation and I never need to use a booster battery.

Easy to install. I use this to keep the battery on my side by side charged. It works perfectly.

Everything is as described. Works great, well made, weather proof, easy to use. Use on boat batteries - well worth the purchase.

I had bought one of these 10w chargers a couple years ago for our 1997 Lexus in the driveway. Works perfectly! We have an 03 Acura in the garage & neither is driven hardly at all, so I got a second charger today for the car in the garage (Running the wire through the wall.) The battery dies from sitting so much even inside out of the weather. Looks like another winner except the lead that attaches to the battery was about 1 foot long. If that. It wouldn’t even make it out from under the hood! My first one didn’t have this issue. It was short, but not THAT short. So I had to correctly add on to it so that it would reach far enough out to connect without having to pop the hood every time. The 10w charger was plenty to keep the Lexus charged even in the 2 or 3 cold winters I have used it, and the product has held up just fine! Didn’t give 5 stars because that is kind of a no brained about the length of the lead. ***UPDATE*** bought a 3rd one for yet another car and realized it wasn’t lit when connected. Tested it and got voltage from the sun. Dawned on me that either something internal is hooked backwards, or the wire is. I switched the leads on the battery and voila! It works. My original one didn’t have this issue and comparing the wire leads, it IS opposite to what I had before.

I bought this here on Amazon on August 4th 2022. I haven't driven the truck it was hooked to in about 8 or 9 months - battery was stone dead. No damage to the cord or the panel, so apparently the controller failed sometime in the past year. Fortunately Autozone replaced my $300 battery with no questions asked - but it's not cool that I had to ask them to. Now I have to find a panel that is actually reliable.

Use for my Dump trailer. Never really have to plug the trailer in for occasional use. If I am dumping 5+ times a day them I plug in. Sits right in top of metal battery/pump box. Magnets do a great job of holding in place. Like the magnets because on some days I stand the panel up to get more direct sun light.

I bought a waterproof solar panel to keep the outboard battery charged on my sailboat. I've adhered the standoff posts to the boat deck with 3M 4200. Because this is a sailboat, the outboard doesn't get used often, so even though there is an alternator in the outbound, it probably doesn't get used long enough to fully charge the battery when used. I've checked the battery voltage a handful of times, and it's staying topped off. It is exposed to the elements, so I'm hopeful the rain over time won't affect the cells.

Feels very sturdy and durable. Tested in late afternoon sun ( 5pm) in southern state and putting out 19.5 volts. Cord length is about 6feet.