Schumacher ElectricSolar Battery Maintainer, SP-200, Quick-Connect Clamps, DC Accessory Plug, Water Resistant, 2.4 Watts, 12 Volt, for Car, Motorcycle, Lawn Tractor, ATV, and Marine Batteries

Kept my battery full for periods of non-use. I use this in the cigarette lighter since my car has an always-on plug there. But the package included clamps to use straight to a battery. The only thing I wish the panel had was a longer cord, but its long enough to reach the back shelf of a full size sedan. I have no complaints with this little guy!

Planning to leave the country for two years, I put my truck in storage in summer 2018, sitting outdoors in Texas, no sun shade. I had just bought a brand new battery for the truck and thought it would be a shame to let the $90 battery die while sitting there. After reading a lot of reviews of inexpensive solar battery tenders, I bought this, feeling no confidence it would work, much less even survive. I disconnected the battery from the vehicle, connected this tender, and left.When I came back, life happened, and I didn't get my truck back until late 2023, when I towed it to the driveway to sit until now, Feb. 2024.I just assumed the battery was dead after five years, tender or not, and was already removing the bracket to trade it in on a new one, but I thought, why not just test it? The multimeter said 12V, but I still didn't quite believe, so I connected the battery back up to the truck. I couldn't believe it actually cranked over, and very strong, too!However, the battery tender's plastic cover melted under the Texas sun. I don't think that's the tender's fault, though: you can see the cracks in the truck's dash that weren't there before.So it's liking like this turned out to be a good bet: $30 to save a $90 battery.

I bought this to keep the battery in a very infrequently used old truck topped off. It is parked outside so it gets plenty of sun through the windshield. I just put this on the dashboard and plugged it into the cigarette lighter and it works great. (I did check to be sure that the cigarette lighter worked even if the ignition was off, otherwise I would have had to connect the charger to the battery directly.) The directions do not say if it is necessary to disconnect the charger when starting the vehicle, but to minimize the chance of any damage to the charger, I do so.

Using this for this first on our gas hog that is rarely used. Mostly the SUV sits in the shade, so i am hoping the windshield area will get enough sun, if not will have to move the panel. Comes with clamps and an adapter for the cigarette lighter. My cigarette lighter is functional so i just used the adapter. But can use the clamps if need be. This is a trickle charger, just made for topping off. I made sure my battery had a full charge then plugged this in. The package also says its moisture resistant, great feature as our stored cars always get some kind of rain or wetness. easy setup. No suction cups for attaching to windshield only some kind of screws. Rather not screw it into my headliner. Found a way to prop it up on top of my sun shades. My only issue is that the packaging inside the main box where the panel sits, is kept together by large staples. i would recommend fully opening and taking apart the packaging. I cut my hands and punctured my thumb several times trying to remove panel. Other issue is that this lower priced model does not come with a gauge to let you know its actively charging. The next model up, has it. I also use the Schumacher battery jump starter/maintainer that runs off electric/plug. Excellent product, used that so many times, well worth the money. WM had some for about $30.00. Has modes for fast charge, jump, and trickle. Just such a pain with all the cords, and keeping the hood open all night to use for battery maintenance.http://www.amazon.com/Schumacher-XC103-CA-Automatic-Battery-Charger/dp/B00ISKYBRM/ref=sr_1_19?s=automotive&ie=UTF8&qid=1442950442&sr=1-19&keywords=schumacher+battery+charger

I recently purchased the Schumacher SP-200 2.4W Solar Battery Maintainer for my motorcycle and I am extremely satisfied with its performance. The device is water-resistant and can be left outside in any weather condition, which is a great feature.The solar panel is incredibly efficient and charges my battery quickly and effectively, even on cloudy days. It has helped me maintain my battery's life and saved me the trouble of having to jump-start my bike every time I want to use it.The SP-200 is very easy to set up and use. It comes with all the necessary cables and connectors, and the instructions are straightforward and easy to follow.

I purchased this to keep the battery in my SUV charged/maintained. I do not drive this vehicle very often and the battery tends to discharge. I do not want to run wires from an outlet to my car so I figured the solar charger on the dash would be a good option. I used a multi-meter and found that this unit does produce the power as advertised. The quick connect clips are convenient and it comes with either the cigarette lighter or battery clip attachments. I tried the cigarette lighter first. Since my vehicle does not have a power outlet that is connected directly to battery (the power is turned off to the outlet when the key is turned off) the power does not flow the other way, back to the battery either. Therefore, I had to connect it directly to the battery. This worked in that it sent current to the battery. Except that at night or on cloudy days, this device sucked current from my battery and actually drained it faster. I would recommend some kind of controller.