SUNAPEX 20W 12V Solar Panel Battery Charger Maintainer, Portable Waterproof Solar Trickle Charger with Built-in Charge Controller, Cig Plug, Alligator Clips, O-Rings for Car, Truck,Tractor, Boat, etc
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Availability:
20 left in stock
Arrives
Monday, Jun 30
Size: 20W
Color: Black
Features
- Battery Savior: Our solar panel is designed to charge and maintain 12V rechargeable batteries. Use it to charge and maintain infrequently used vehicles; boats; outdoor electronics; lawnmowers, and more. Ensure your devices start anytime and protect batteries from long-term discharge. Its also ideal for off-grid devices like electric fences; gate openers; water pumps; weather systems; cameras; etc. Compatible with most battery likes sealed lead-acid; lithium; LiFePO4; GEL; AGM; flooded; etc
- High-efficiency Solar Panel: Our solar panel features monocrystalline cells. Compared to other polycrystalline and amorphous solar panels of the same size, our monocrystalline solar panel charges faster
- No Overcharging, No Battery Drain: The solar panel includes a built-in controller that prevents overcharging. When the battery is full, the controller stops charging automatically and resumes when the voltage drops. Our solar panel system wont drain your battery
- Visual Charging Status: The controller has 3 indicator lights: blue (sunlight exposure); red (charging); and green (battery full). Easily monitor the charging process
- IP67 Waterproof: Our fully sealed solar panel system is IP67 waterproof, suitable for all weather conditions
- Easy Installation and Portable: Lightweight and flexible, our solar panel can be effortlessly carried anywhere. Equipped with suction cups and carabiners, its easy to install on car windows or hang wherever needed
- Worry-Free Warranty and Support: SUNAPEX offers a one-year warranty and lifetime technical support for our solar panels. Our 24/7 customer service ensures prompt responses. If youre unsatisfied or need technical assistance, feel free to reach out to us
Brand: SUNAPEX
Material: ETFE
Product Dimensions: 13.7"L x 1.5"W x 14.96"H
Item Weight: 1.06 Kilograms
Efficiency: 30% High Efficiency
Brand: SUNAPEX
Material: ETFE
Product Dimensions: 13.7"L x 1.5"W x 14.96"H
Item Weight: 1.06 Kilograms
Efficiency: 30% High Efficiency
Connector Type: SAE
Included Components: 1 X 20W Solar panel +1 X Cigarette lighter+1 X Alligator clip+1 X O-ring wire +1 X Manual
AC Adapter Current: 1.11 Amps
Maximum Voltage: 12 Volts
Upper Temperature Rating: 140 Degrees Fahrenheit
Maximum Power: 20 Watts
Special Feature: Built-in charge controller, visual charging status indicator, IP67 waterproofing, easy installation
Output Voltage: 12 Volts (DC)
Item Weight: 2.33 pounds
Manufacturer: SUNAPEX
Country of Origin: China
Item model number: SA_RXMPPT_30W
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Jun 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 20W
Color: Black
This 20W solar panel has proven to be a reliable power source for my Meshtastic node. The built-in charge controller is particularly valuable for this application, preventing overcharging of the battery without needing additional components. I'm getting consistent power output even in partial shade, which is crucial for maintaining node uptime in less-than-ideal locations. The panel's physical construction is appropriately weatherproof - I've had it outdoors through several rainstorms without issues. The included mounting O-rings are sturdy and make it easy to secure the panel to poles or other structures. While the cigarette lighter adapter isn't particularly useful for Meshtastic applications, the alligator clips work well for connecting to standard battery terminals. For Meshtastic users specifically, I found the voltage output to be very stable, which helps prevent node resets. The 20W capacity is actually more than needed for a basic node setup, but this overhead is helpful on cloudy days or when running additional sensors. You'll want to add appropriate connectors for your specific battery setup, but the included wiring is of good quality and easily adaptable. One minor consideration is the somewhat limited length of the included cables, so factor in some extension wires if you're planning to mount the panel any significant distance from your node. Also, while the frame is sturdy, you might want to add additional UV-resistant coating if deploying in extremely sunny locations for long-term installation.
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Reviewed in the United States on January 22, 2025 by CJ
Size: 20W
Color: White
This solar panel keeps my Prius 12v battery going. I’ve lost 12v power before for various reasons and had been reproducible. With this in play my 12v hadn’t dropped like it did before. Works great on my rear window while I’m camped out or parked for awhile or while being stowed in the driveway for extended periods of time. Cheap and effective
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Reviewed in the United States on February 21, 2025 by vk
As the built-in charge controller comes with indicator lights, if find the LED on the 12 volt plug to be redundant and an energy drain. The unit comes with a blocking diode, which is good, but the plug LED is not blocked and uses juice 24/7 making a net daily charge very slow. I took the plug apart and cut out the LED. That way I can leave the charger plugged in continuously with little overnight loss. A magnetic strip would be nice to help anchor it to the vehicle. Seems well built and bullet proof. Slow to charge, discharged batteries, I don't there will be any problem in overcharging them. Revised: On further research it appears having the SAE plug reversed is often used, to the extent that SAE polarity reversal adapters are commonly available. I just figured out that the panel and the supplied accessories are wire backwards to SAE normal. This means for example, that when you attach the battery clips to your car battery, you risk having the exposed SAE pin, now positive, to ground out on any part of the car. This will cause sparks and possible burns and even explosion due to battery hydrogen. Plus the accessories won't work, possibly dangerously, with other SAE products like battery chargers.
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Reviewed in the United States on September 4, 2020 by nut 4 squirrel
Size: 30W
Color: Black
I have an IID breathalyzer in my car and it kills my battery within 2 or 3 days of not driving. They say it's low power usage but that's crap. Also stressing the battery is one way to blow threw a good one. Anyways, I tried a 7.5 Watt panel and it just wasn't enough still dead by day 3. Not playing around I baught this 30 Watt and it works perfectly. Left my car in a half simi shade spot for 3 days and the car started up no problems at all. It's on the dash at the moment, but I'm gonna run it for under my sun roof soon and do some tests to see if it's enough and will update my review here in a few weeks after testing. The reason being is that sun roofs have a factory tint that you cannot remove that reduces the power by a third. Still being who I am I want to test it and find out.
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Reviewed in the United States on February 26, 2025 by SJ SJ
Size: 20W
Color: White
The 20 volt model is superior to the 10 volt and works immediately. The lesser voltage is a waste of money
Reviewed in the United States on February 14, 2025 by DR. PHIL HARMONIK
Size: 30W
Color: Black
Originally to get the immediate use from these (I ordered two), I simply attached the cigarette lighter connector to the panel and plugged it in. This worked perfectly. So recently I decided to use the direct battery connector so I could just unplug the panel when I didnt need it, but when I went to connect it, I noticed the red wire (positive) from the panel was connecting to the black wire side of the direct battery connector plug. This would result in battery current flowing backwards through the panel. I know this as I have a good sized solar setup on the house going to batteries. The lighter plug seems to be wired correctly as red connects to red. In all the other plugs for direct connection to the battery or the alligator clips to the battery, the connection would be red to black, which would be a bad thing. I could simply reverse the direct battery plug to connect the black to the battery positive and red to the battery negative, but people who dont know may find themselves dealing with a direct short, possibly burning up the panel or worse. I suppose most people would use the lighter plug connection, and that seems to be the only correct one, but I do wonder about the others. i did verify this with a multimeter as well, the panel is putting out 17 volts, and red is positive.
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Reviewed in the United States on October 21, 2024 by Joe C Joe C