Sunway Solar Car Battery Trickle Charger & Maintainer 5W Solar Panel Power 12V Charger kit Portable Waterproof for Automotive RV Marine Boat Truck Motorcycle Trailer Tractor Powersports Snowmobiles

Works great on cars and lawn tractor. Keeps batteries fully charged when equipment is not in operation. Shipping was quick.

Something drains the battery in my truck. If I don't drive it for a week, it will be dead. I don't have time to hunt down the drain so I purchased this, as I don't have any outlets near where I park it. 1 week later my truck starts right up. It has been cloudy and a few days it was covered in snow and this still kept the battery topped off. I am super impressed! My one complaint is that the solar panel does not disconnect from the cord at the solar panel. Not a big deal, but I have to open the hood to disconnect it.

Seems to work fine, putting almost 15 volts out measured at the cable end. Mounted inside my windshield with truck facing early morning sun, it brought a battery at 12.1v up to 12.5 v. Sun lasts about four hours before going over the top of the truck. So about four more hours of shade with bright sky light only on the panel. Only issue is there are two batteries on my diesel Ram pickup and the other (passenger side) battery is not getting any voltage. I am charging through the power port. Looks like I have to use the alligator clips on that one and keep both charged by moving the clips to the other battery every day or so. It would be nice to have a splitter so I could plug into the power port and have another wire long enough to go past the door moulding and into the engine compartment to the second battery. Or a splitter with two sets of clips, each long enough to reach the batteries. Not use the power port. One wire could be longer than the other because I mount the panel on the lower driver side of the windshield. I will experiment by letting the batteries go down a bit and hook up the charger clips to the passenger side battery and see if the voltage reaches the driver side battery too. I don't know how these batteries are connected. The suction cups are easy to lose. They are not very secure, especially if the panel is mounted vertically. Be careful if you move the panel a lot.

Compatible with my Polaris snowmobile

I used this on my second car in the hopes of maintaining the battery pending a sale, and ended up having to replace the battery because this was useless and the battery died. The car was parked outdoors in full sun all day, every day, but the charger did not manage to produce enough power to keep the battery alive. The wires are also the cheapest quality possible. I snagged one accidentally on the trunk, and it snapped in half with barely any force. AVOID.

I use this in my RV and it continuously keeps my battery conditioned and ready to go. I've had this for quite some time now and I can't believe the value for money I got on this!

The only reason I give it a low review is they have their polarity reversed different than any other charger so if you already have one installed, it will not work correctly until you reverse the polarity

Since my retirement, I do not drive my vehicles (two of them) enough to keep the battery charged. I came across this solar solution and ordered one to check the quality. I was very surprised and pleased. It was easy to install, I was able to connect it using my cigarette lighter plug since the plug operates when the car ignition is off. So far so good! I have since ordered two additional devices, one for my second vehicle and one for my husbands vehicle. My husband has an antique vehicle so the cigarette lighter does not operate while the ignition is off, so I simply attached the battery clip connector to the solar panel connector and placed the solar panel on the windshield inside the car, and since the wiring is so thin, I ran the wire through the hinged edge of driver side door and under the hood of the car and clamped the battery clips to the battery, with plenty of wiring remaining. This keeps the solar panel out of the weather! I will keep you posted as to its durability and longevity, but so far, no dead batteries!