Solar Panel Kit 20W 12V, Waterproof Solar Battery Trickle Charger Maintainer + Smart MPPT Controller + Adjustable Mount Bracket for Boat Car RV Motorcycle Marine Automotive

I bought the SOLPERK 20W Solar Panel Kit to keep the battery on my RV topped off, and it has worked perfectly from day one. The panel feels solid and well-made, and the adjustable mount makes it easy to position for the best sun exposure. The upgraded controller is simple to use and gives you peace of mind that the battery won’t overcharge. Even on cloudy days, it still provides a steady trickle of power. I’ve used it on both my RV and my boat battery, and in both cases it kept everything fully charged and ready to go. Installation was straightforward — the kit comes with all the connectors you need, and the wiring is clearly labeled. Once it’s set up, you basically don’t need to touch it again. This is a great solution if you want a reliable maintainer for a car, boat, motorcycle, or RV battery. It just works. Highly recommended.

Good quality solar panel for maintaining battery charge. Easy to set up, solid build, and the controller works reliably. Ideal for vehicles or batteries that sit unused for long periods. Not designed for fast charging, but works well as a maintainer.

UPDATE 1/11/26: It has been over 2 months since I installed this solar charger for my lawn tractor battery and I am still very impressed. I did have to install some extra wire length to reach my lawn tractor battery, but that was not the fault of the solar panel and was relatively easy to do. What I did do, that has been a big help, is glue magnets to the back of the controller, which now keeps it from hanging or falling off the lawn tractor. The controller, with only 3 lights, is easy to read and quickly assess if it is charging and if the battery is charged. Even on cloudy days, this solar panel is charging! I'm considering getting another Solperk Solar Panel kit for my farm tractor stored in a "non-electrified" barn. So far, I really enjoy not having to worry about a discharged battery when I want to use my lawn tractor! I've had no problems with this solar panel and controller! I purchased the SOLPERK Solar Panel Kit 20W 12V, Solar Battery Trickle Charger Maintainer to charge the battery on my lawn tractor, which sits in a shed without electric service. So, the battery didn't seem to maintain a full charge between uses and sometimes wouldn't turn the engine over. I installed this yesterday to help maintain the lawn tractor battery in full capacity. The installation is pretty simple, with a bracket to hold the solar panel provided. Just a note, the bracket can only be mounted in a horizontal position to support the solar panel and provide directional control for the panel to face the sun. Installing the bracket vertically, will only allow the solar panel to be turned left and right and will be perpendicular to the sun if mounted on a vertical post or wall. There is about 8' of wiring to the controller which connects to the panel. The controller requires no programming by the user. Connect the controller to the 12V battery (battery clamps provided with unit) then plug it in to the solar panel and three lights will tell you everything. The blue light (on top of the others) tells you the panel is in the sunlight and providing normal voltage. The second light is red and will tell you that it is charging the battery. The third light (green) appears only when the battery is charged, which means the battery has 14.2 volt charge. It comes with a set of wires to actually screw down on battery posts. So far, the unit seems to be working and has charged my 12V battery fully! No need to remove the connections when charged, as the controller will prevent it from overcharging the battery. I don't know about longevity of the product, the controller is supposed to be waterproof but I keep it inside with the lawn tractor. Other than keeping the solar panel clean with a damp towel, and the battery clamps clean, there isn't much more maintenance required, the instructions say! So far, I do like the unit and being able to keep my lawn tractor battery at full charge! Easy installation!

Remo One Star because the Clearly not in M PPT Controller. However comeat work like a Charm and has Survive all of the Winter Storms. It is happily keeping my motorcycle battery charged at 13.8 V. I took a depart because I didn't trust the waterproofing but it turns out it is fully seated in a gel like silicone and unless you wiggle the cables around too much, it will be pretty waterproof for quite some time. just be aware that the polarity on the connector is different from any regular motorcycle battery trickle charger. I ended up cutting the cable and changing the polarity to make a compatible with my existing trickle charger connect war on the motorcycle. I also placed a fuse holder on the positive side in case something tries to burst into flames

Works great! Easy to install and feels very well made. Has been perfect to keep the battery on my mustang since I don’t drive it very often. It’s portable and easy to store when not in use. Good value for the price, definitely recommended.

I’m extremely impressed with the SOLPERK Solar Panel Kit 20W 12V. It’s a high-quality and well-designed product that truly delivers what it promises. The installation was quick and easy, especially with the adjustable mounting bracket, which made it simple to find the perfect angle for maximum sunlight. The upgraded controller works flawlessly and protects the battery perfectly, preventing overcharging or discharging issues. I’ve been using it to maintain my car and RV batteries, and it keeps them charged effortlessly, even after several cloudy days. The panel feels sturdy and durable, built to handle outdoor conditions. What I love most is that it’s versatile — perfect for boats, motorcycles, and other 12V battery systems. It gives peace of mind knowing that my batteries are always maintained and ready to go. Overall, this SOLPERK solar kit is an excellent investment for anyone looking for a reliable, easy-to-use, and efficient solar charging solution. Highly recommended!

I bought this solar panel and I'm very satisfied with the quality. It comes well-equipped with a charge controller, cables with clips, and an adjustable stand, which makes installation very easy. I've used it to keep a 12V battery charged, and it works perfectly, even on partially cloudy days. The material feels sturdy and of good quality, ideal for outdoor use. It's an excellent option for cars, RVs, camping, or off-grid systems. Very good value for the money. I highly recommend it.

Good quality solar panel for maintaining battery charge. Easy to set up, solid build, and the controller works reliably. Ideal for vehicles or batteries that sit unused for long periods. Good quality material overall I really like this product.

Good

Works as stated. Good value. I use it to trickle feed my motorhome starter battery while it is stored. The cables are a fair length for most; however, I did need to extend mine because I wanted it on the roof of the motorhome where it was in the sun all day and not sitting on the ground. It does come with a handy bracket that can be used as a stable stand, or for mounting somewhere. It also has a controller to make sure it doesn't over-charge. I'll see how it goes for a few months and update the review if need be.

Good quality

seems to work great keeping my battery for my trolling motor charged

Very nice unit that works as expected for a good price.