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Sunway Solar

Solar Car Battery Trickle Charger & Maintainer 12V Solar Panel Power Kit Portable for Car Automotive RV Marine Boat Motorcycle Truck Trailer Tractor Powersports Snowmobile Farm Equipment

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Aug 17
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Size: 4W


Features

  • [Solar Panel Power Up To 4W]--Keep your 12 Volt batteries topped off with this solar battery trickle charger ,which helps to manage 12v battery drain in all seasons. Designed to compensate for small, steady battery drains from the vehicle's clock or alarm system.
  • [Stronger and Durable]--This solar powered battery charger is Covered with ultra clear PV glass which is more efficient and also with Durable ABS plastic housing which makes this solar panels charger more stronger. Low Maintenance!
  • [For Any Rechargeable 12Volt Batteries]--This solar battery trickle charger is the eco-friendly way to maintain and safely charges any 12volt Wet, Gel, SLA,AGM, LiFePO4,Lithium-Ion and Deep Cycle batteries. It can maintain the charge of any cars, trucks, marines, motorcycles , tractors, ATVs, snowmobiles, boats and personal water crafts or RV 12 volt battery!
  • [Reverse Charging Protection]--With BUILT-IN DIODE for prevents reverse charging from batteries.With a 12volt LED charge indicator. The Led light up when it is charging. The solar charger maintainer Includes cigarette lighter adapter and alligator battery terminal clamps. We offer 12-Month warranty and good customer service.

Description

Why do I need a solar trickle charger? Three reasons to own a Sunway Solar Battery Trickle Charger: Features: Operation: For optimal power, ensure the panel is directly facing the sunlight. Clean the Solar Battery Charger MONTHLY, or more frequently to maintain peak efficiency. Check the battery is 12V and larger than 20Ah. If the battery capacity is 20Ah or greater, the charger will not overcharge the battery or cause any damage. If the battery capacity is smaller than 20Ah,a suitable charge controller will be required. Or,please don't continuous charging more than three days. The solar charger is a basic of trickle charger and it is best for slowly charging and maintaining battery charge.Please note that the charger is designed to top-up battery charge as a result of natural drainage. It is not intended to recharge a battery that has fully discharged. The charger can withstand splashing and water, but it should not be submerged in water. The solar charger panel can be mounted to the windshield or mounted using the mounting holes and place the charger in the desired location in direct sunlight. Note:Some vehicles have tinted windows that will seriously affect the performance of your charger if it is positioned behind them. For Optimum charging the unit should be placed outside the vehicle in direct sunlight! Plug the solar charger into your vehicle's 12-volt lighter socket. In some makes of vehicle, the cigarette lighter may not operate when the ignition is turned off. Note:You must disconnect the charger from your cigarette lighter or battery when starting you engine or driving. Electrical surges from the car engine when starting and running may damage your charger. The charger can be connected to the battery using the crocodile clips provided. Note:Ensure the red cable is connected to the positive (+) and the black cable is connected to the negative (-). If in any doubt seek assistance from a competent person. Do not leave the solar charger connected and unattended for long periods.

Brand: Sunway Solar


Material: Glass, ABS Plastic


Product Dimensions: 13.9"L x 5"W x 0.5"H


Item Weight: 1.4 pounds


Included Components: Power Cable


Maximum Voltage: 12 volts


Maximum Power: 4 watts


Output Voltage: 12 volts


Connector Type: Cigarette Lighter Plug, Battery Clamps


Item Dimensions L x W x H: 13.9"L x 5"W x 0.5"H


Item Weight: 1.4 pounds


Material Type: Glass, ABS Plastic


Brand Name: Sunway Solar


Included Components: Power Cable


Model Number: 4W solar trickle charger for battery


Unit Count: 1 Count


UPC: 611550648699


Manufacturer: Sunway Solar


Manufacturer Part Number: SWS-C3W001


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Aug 17

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.

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Top Amazon Reviews

    • 4 watt works better than the 8 watt panels
Size: 4W
Great product, even though the first one I bought warped, and died after about two years. Used every day in my truck, as it is parked unless camping or picking up lumber or jerrends like that. I purchased two 8 watt, and they have to be in exactly the right spot to charge, which means you have to keep moving it also and have a meter to check. (Major return problems). That is why I bought this 4 watt again, and is working great. ... show more
Reviewed in the United States on April 14, 2026 by Dave
    • Works great!
Size: 4W
I love this little thing! It adds just enough to keep my truck charged and ready to go. I generally park with my truck facing away from the sun so I place the solar panel in the rear window and run the wire to the socket on the dash (continuously on) which works perfectly.
Reviewed in the United States on December 24, 2025 by RBMills
    • 🌟🌟🌟🌟🌟 **A Reliable and Efficient Solar Charger!**
Size: 4W
Just to note - this seems to fail about every 18 months - I hope this one doesn't do the same again The Sunway Solar Car Battery Trickle Charger & Maintainer is exactly what I needed to keep my 12V car battery charged and maintained. The solar panel is compact and lightweight, making it easy to position on the dashboard or windshield with the included suction cups. It’s super easy to set up—just plug it into the cigarette lighter or connect it directly to the battery with the alligator clips. I’ve been using it for a while now, and it keeps my battery in top shape, even during extended periods of non-use. This is a great solution for maintaining batteries in cars, boats, or RVs. Highly recommend for anyone looking to extend their battery life and avoid unnecessary drains. ⭐⭐⭐⭐⭐ ... show more
Reviewed in the United States on December 9, 2024 by PapaKnowsStuff
    • Works fine but you do need to isolate any load from the battery(s)
Size: 4W
Review Image by CiscoKid
So I bought this Sunway solar Car Battery Trickle Charger to maintain my 12v RV trailer battery's when the trailer is not in use. The trailer is 28ft and has two batteries hooked in parallel that feed the camper. Having battery power is important because it is needed to open the two large slides not to mention powering lights etc. Initially I hooked the solar panel up without removing trailer connections to the batteries and a week later returned to find the batteries totally drained. I knew there must be something drawing power in the trailer and discovered LEDs, a gauge, and a CO2 detector that was drawing power. After recharging the batteries using shore power, I installed a heavy duty switch in-line on the negative lead leading into the camper. I did this by drilling a 2" hole in the battery cover lid and inserted the switch through the lid cover. I ended up with a clean solution. Using the switch I isolate the camper from the battery bank when the camper is not in use and the solar panel keeps the batteries topped up as as designed. When I need to use the camper I simply turn the switch and power is applied to the camper. The output current of this size solar panel is only able to top up batteries. If you want to charge empty batteries to a fully charged state you will need a larger Solar panel. This panel will do what it is designed to do...i.e. top up batteries that do not have a load. The switch can be found at https://www.amazon.com/gp/product/B07MQ54KKH/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 ... show more
Reviewed in the United States on March 13, 2020 by CiscoKid
    • highly portable and light weight
Size: 4W
Thus far this is a wonderful camping buddy. I use it to ensure my vehicle battery is fully charged while out camping. Great item.
Reviewed in the United States on July 17, 2026 by Infotekkie
    • Cracked case in under 2 weeks
Size: 4W
Review Image by lauren walsh
Review Image by lauren walsh
Review Image by lauren walsh
3 star review for the housing breaking apart from heat. Had for less than 2 week and it cracked other than that it charges my vehicle as intended will have to wait to see if it’ll stand the test of time or if the cracked case is due to internal pressure and failure of the product in time.
Reviewed in the United States on March 30, 2026 by lauren walsh
    • Discharged my battery!
Size: 4W
Review Image by Hector Jimenez-Ramirez
Review Image by Hector Jimenez-Ramirez
PRODUCT DID NOT WORK IN MY CAR: I used it on a 2002 Toyota Camry that I hardly use. The battery was new. I connected the product through the lighter and it discharged my car's battery down to ZERO!. PRODUCT CASE NOT HARD ENOUGH FOR HOT CLIMATES: After a few weeks under the car's window, the plastic case melted on the sides. Maybe OK for colder climates but now for extreme heat. I contacted the manufacturer that appeared in the Amazon page to ask about the issue and they said could not help me because they did not manufacture the product or sold it. They even claimed not to sell trough Amazon. NO HELP. ... show more
Reviewed in the United States on May 22, 2025 by Hector Jimenez-Ramirez
    • Trickle charger that works year after year
Size: 4W
I am a snowbird, when I come home in the early spring, my truck starts right up. Plug it in the cigarette lighter put it in the windshield. See you in six months. Battery is fully charged when I get home.
Reviewed in the United States on December 18, 2025 by Steve potts

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