This solar panel kit works exactly as advertised and was very easy to set up. The included mounting bracket and smart controller make installation straightforward, and the waterproof design gives peace of mind for outdoor use. It does a great job maintaining my battery charge and performs reliably even on partially cloudy days. The build quality feels sturdy, and all the necessary cables and connectors are included. Excellent value for keeping vehicle, boat, or RV batteries topped off without needing constant attention. Highly recommended for anyone looking for a dependable solar battery maintainer.

Installed as a trickle charger for my full home generator battery. Used to have to buy a new one each year since it couldn't be recharged. Hope this keeps the charge up to save buying a new one. Comes with typical battery clamps AND an optional set of wires to attach directly to the battery as shown, far more secure than the clamps as the generator vibrations will cause the clamps to fall off. Be sure to encase the wires in a plastic covering to prevent chaffing and the sun's UV rays. The control panel clearly when it's charging. If it works for a long time, it's definitely worth the money. Gave five stars since it is working properly. Might review in a year to see if the battery still works as having held a charge.

⭐⭐⭐⭐⭐

Excellent solar panel for the price. Easy to install, good quality materials, and keeps the battery charged without any issues. The MPPT controller works very well. I totally recommend it for cars, motorcycles, or RVs.

This panel and controller works as expected. Charged up my 12 volt barreries in a reasonable time frame. Nice and compact. Perfect for my solar experiment to keep 12 volt batteries charged for charging USB devices like phones and led lights.

This solar panel works great, I replaced my old one that went bad with this one on my front automatic gate by USAutomatic. It larger, better made and puts out a higher charge for my battery, it keeps it well charged on shaded parts of the day, winter days and cloudy days. I like the extra feature of having the waterproof controller to help regulate the charge and lets me know that everything is working properly.

Super easy to install, plenty of long wire, quick connect plugs on the ends and all well built.

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!

The Solperk 20W, 12V solar panel kit is a practical choice for those seeking a portable and efficient solution for keeping batteries charged outdoors. Its compact size facilitates easy transport and installation, making it ideal for vehicles, boats, electric fences, or small backup systems. It includes a charge controller, which helps protect the battery against overcharging and extends its lifespan.

In terms of performance, the panel delivers a stable output under good sunlight conditions; however—as is to be expected within this power range—its capacity is geared more toward maintenance charging than toward powering high-consumption loads. The materials feel sturdy, featuring a design engineered to withstand moderate weather conditions.

Very happy with this product. It works perfectly, charges quickly, is practical, easy to use, and of very good quality. A purchase that is truly worthwhile.

Great product with great pricing. Will buy again. Highly recommended seller.

Very happy with purchase. Excellent product. Thank you, recommended seller

Came to date is supposed to come, nothing was damaged, exactly what I wanted, works well

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

Good