Voltset 12V Solar Battery Charger - 20W Waterproof Solar Panel Kit with Smart MPPT Controller - Trickle Charger Maintainer fo
4.5 | 1,545 ratings
Price: 31.49
Last update: 01-20-2026
About this item
- Full-Potting IP67 Controller: From Voltset IP67 Full-Potting Technology eliminates moisture intrusion, ensuring stable current flow even in -30°C to 80°C extremes, algorithms maximize daylight conversion (up to 99.3% efficiency) while cutting vampire drain to <0.1mA after sunset
- Smart 3-stage Visual Charge: 3-stage charging technology (direct/float/trickle charge) for 12V LiFePO₄, lithium, AGM, SLA, GEL, etc, charging efficiency increased by 18%, controller LED screen displays charging status in real time, three indicators: blue (sunlight exposure), red (charging), green (battery fully charged)
- Versatile Applications: Solar panel kit includes alligator clips and O-rings, convenient for plug and play. Collapsible design reduces storage volume by 20%. Suitable for cars, RVs, boats, motorcycles, trailers, camping, garden lighting, surveillance systems, outdoor activities and other scenarios to meet your diverse needs
- Sun Tracking Flexibility: Our 12V monocrystalline solar panel+ 360° adjustable aluminum bracket allows for precise angle optimization to maximize sunlight absorption throughout the year, The bracket can be rotated ±15° to follow the sun, increasing the average daily sunlight absorption by 12%
- Quality Assurance: VOLTSET offers 24/7 professional customer service and a 12-month warranty. The package includes 1 solar panel; 1 charging controller; 1 mounting bracket; 1 set of alligator clips; and 1 set of O-rings with installation screws
Top reviews from the United States
- Bill OwensBattery Charger is exactly what I was looking forThe Voltset 12V Solar Battery Charger – 20W is exactly what I was looking for. It feels solid and well built, with quality materials and sturdy connectors. Setup was quick, and it immediately started delivering a steady charge. I’m using it to maintain my car battery while the vehicle is in storage, and it’s doing the job perfectly—no more dead battery worries after sitting for weeks. Reliable, simple, and effective. Highly recommended for anyone needing a dependable solar maintainer.
- Craig SalmanchargerWorks great, easy setup, battery charged quickly
- SkiGood for generator batteries too.I purchased to trickle / maintain my generator battery. I hooked up the leads to a DEAD battery, “set it and forget it” IYKYK!!
I don’t know how long it took or exactly when in the last four weeks, but yesterday the Charged Light was glowing. Generator fired right up. Impressive!
I have the panel on a southern exposure. I live in a neighborhood with several old, established, very tall trees. So the panel is not in direct sunlight for too long. But the Solar light is lit all day.
My generator is stored in a plastic yard storage box so the electronics are protected from the rain. Solar panel is mounted to the side of the box and lives there rain or shine. No issues.
I found this was a good value for the money and it exceeded my expectations. - J. HorstGood product and exceptional support!This was my first (& second & third) Solar panel and definitely aided in my learning experience! The 30W panel with MPPT worked exactly as advertised. It trickle charged my LiFePO4 battery as expected, and the easy mount was great to work with! So why 4 stars?
First, there are no specifications provided for the MPPT controller. Granted, support was amazing and sent me the full spec sheet but some of that information should be included here, up-front. Primarily, the description needs to include what the max solar load the MPPT controller can support (50W). This leads me to my second reason -- there is very little room to grow!
If you're looking for that slow trickle charger with manual feedback, this is perfect! However, I found that, in real-world use, I needed 80-100W of solar power to do what I needed so this controller just wouldn't cut it for me (had to buy another unit instead).
Overall, while knowing what I know now, I would have never purchased this FOR MY PROJECT. But it doesn't change the facts about this unit -- it is a good product with a great company backing it (I should know - I have 2x 30W panels and a 20W panel in use!).
Summary:
Pros:
- Good build.
- Long power cords with SAE connectors.
- Lightweight, angled mounting hardware.
- MPPT controller works as advertised.
- Great for trickle-charging batteries [for long-term storage].
- GREAT customer support!
Cons:
- No real room for growth.
- Company doesn't sell JUST panels (must be in a kit).
- Controller doesn't offer any remote monitoring. - Family of FiveF150 truckThis one worked great after trying two other ones that either drained my car battery or was hard to install outside. I wanted it for my F150 that isnt driven often I has a dash cam and a parasitic slow voltage loss somewhere. Things to know solar chargers really need to have direct light to panel, even mounting inside a car on dashboard will lose 2 to 4 volts. On a typical day about 20 volts come from the panel. As someone else mentioned going through the controler it does lose 2 volts so now 18 volts leaves controler to battery. I was getting 1.5 amps to battery. Controller i feel works well shutting panel off at night and not allowing a power drain. Seams to keep battery at a constant 12.8 volts for me. I have never had charger say fully charged even with car running. I actually moaned mine to the rear bed and ran wires under car to inside visor for my controler and hard wired to battery.
- The SauceSo far, so goodI purchased it to keep the battery charged on a miniature pontoon boat. It seems to be well made and easily portable. It was really easy to install. The two sets of connections are handy. I didn’t check the voltage, but the solar and charging lights lit right up even being overcast and an hour or so prior to sundown. Time will tell how it holds up.
- Lynette DohertyDurable, good value solar panelWe have several of these solar panels & use them to keep batteries charging in our motorhome, golf cart, and old bronco that sits a lot. Works great. Good value.
- lilpuma StudiosWorks great for keeping batteries chargedThis Voltset 12V solar charger is perfect for maintaining my vehicle and trailer batteries. It’s easy to set up, waterproof, and keeps the charge steady even on cloudy days. Great quality and peace of mind for off-grid or parked vehicles!