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SUNAPEX

SUNAPEX 20W Solar Panel Car Battery Trickle Charger Maintainer, 12V Portable Waterproof Solar Panel Trickle Chargering kit for Car Boat RV Motorcycle Truck Marine

    • Based on 1,347 reviews
Condition: New
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Thursday, Jan 16
Order within 16 hours and 47 minutes
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Size: 20W


Color: White


Features

  • 30% High Efficiency20W solar car battery charger is made of more effective monocrystalline silicon material, which absorbs solar radiation heat to a greater extent. The power generated is at least 30% higher than another solar panel charger, which greatly improves the charging efficiency and speed.
  • Upgraded Smart ControllerWith upgraded Intelligent charger controller and charging algorithm, more than 20%-30% more power than other solar charge controllers. SUNAPEX 20w solar battery charger ensures no reverse discharge, overcharge, over-voltage, or short circuit, charging and maintenance of your 12v batteries.
  • LED IndicatorsSUNAPEX 12v solar battery maintainer has 3 color LED indicators that help visually monitor the working status. Solid blue indicates receiving sunlight and the output is normal. Solid red indicates connected to the battery and charging. Solid green indicates the battery is full. No lights indicate a short circuit occurred.
  • Charge 12V BatteriesThe solar panel battery charger is lightweight, compact in design, and features quick SAE connections and 3 wiring methods (red for positive, black for negative) for easy installation and use, suitable for cars, boats, RV, trailers, ATVs, etc, widely used in 12v batteries and DC charging equipment.
  • Why Choose SUNAPEXThe Frame of SUNAPEX 12v solar battery charger is made of FR-4 epoxy board, unlike solar panels with plastic frames, this material never deforms or melts even at high temperatures. No worry about the solar panels being deformed and unable to be used.
  • Upgraded ETFE materialThe 12v solar battery charger adopts ETFE material can collect sunlight from different angles, and the fine layout can make secondary use of sunlight refraction. The light transmission rate up to 95%, providing 30% high photoelectric conversion rate. Its built-in aviation grade impact resistant material can effectively resist impact.
  • 12-Month WarrantyThe quality of the SUNAPEX solar trickle chargers is guaranteed by CE/ROHS certification and provides lifetime technical support and a 12-month warranty. Please feel free to contact us if you have any questions or doubts, we will respond within 24 hours.

Brand: SUNAPEX


Material: monocrystalline silicon, ETFE


Product Dimensions: 14.4"L x 13.4"W x 0.39"H


Item Weight: 2 Pounds


Efficiency: High Efficiency


Brand: SUNAPEX


Material: monocrystalline silicon, ETFE


Product Dimensions: 14.4"L x 13.4"W x 0.39"H


Item Weight: 2 Pounds


Efficiency: 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


Item Weight: 2 pounds


Manufacturer: SUNAPEX


Country of Origin: China


Item model number: 20W


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jan 16

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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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good product
Size: 20W Color: White
So far so good. Attached it to my RV battery as per the instructions and it seems to work. Not that much power, but enough to extend battery life when I don’t want to run a generator. The suction cups are pretty marginal, but the panel works well.
Reviewed in the United States on December 8, 2023 by Amazon Customer
    • So far good quality
Size: 10W Color: Black
Review Image by c'est la vieπŸŽ‰πŸ˜˜ c'est la vieπŸŽ‰πŸ˜˜
Review Image by c'est la vieπŸŽ‰πŸ˜˜ c'est la vieπŸŽ‰πŸ˜˜
Review Image by c'est la vieπŸŽ‰πŸ˜˜ c'est la vieπŸŽ‰πŸ˜˜
Review Image by c'est la vieπŸŽ‰πŸ˜˜ c'est la vieπŸŽ‰πŸ˜˜
I've been using the SUNAPEX 10W Solar Car Battery Trickle Charger & Maintainer for a while now, and it’s a great way to keep the car battery charged, especially if you don't drive it every day or if you live in a cold place. The solar panel is lightweight and portable, so you can easily take it with you wherever you go. It's also waterproof, which is a big plus. The charger is easy to use. Just connect it to your car battery and leave it in the sun. It will automatically start charging your battery. The charger also has a built-in overcharge protection feature. I've used the charger to keep my car battery charged when is cold outside and I don’t go out, and it's worked perfectly. ... show more
Reviewed in the United States on November 4, 2023 by c'est la vieπŸŽ‰πŸ˜˜ c'est la vieπŸŽ‰πŸ˜˜
    • So far it works but bad design.
Size: 10W Color: White
So far it works in keeping my generator battery charged. The controller unit is to thick for the suction cups so it bows out in the middle and puts additional pressure on the suction cups, this is why I gave it 4 stars.
Reviewed in the United States on October 12, 2023 by paul carroll
    • Great Solar Charger
Size: 20W Color: White
Review Image by Invoxicated Invoxicated
My experience with solar chargers started about a year ago. I had a 5 watt charger that a friend had given me for my generator battery. I never used it for that. Fast forward one year later - I have since retired and my truck sits in my driveway a lot more than it used to. My battery kept going dead so I tried the 5 watt charger and waited a week to see if it either worked or if my battery was dead again. To my surprise it worked! My truck started right up but the problem was that the old battery was 4 years old at that point and I knew that this was going to keep happening unless I either went back to work or I was going to keep the solar charger on my truck battery. The sun and the heat warped my 5 watt charger so I needed a new one. I saw this one and it was on sale at the moment I purchased it here on Amazon. You should know that any solar charger you buy will be subjected to extreme heat and light so please keep that in mind when you buy one of these things. I recently went to remove mine during a hot afternoon and nearly burnt myself because the unit was so hot after being on my dashboard in the midday sun in front of my dashboard heat shield (see pic). 20 watts seems to be the limit for a solar charger before it needs a separate controller to regulate the flow of power to what whatever it is you're charging. Also for those who care at 20 watts the charger is putting out about one amp of DC electricity which would be the equivalent of a trickle charger output from a battery tender. I like this unit because the solar panel is flexible instead of being rigid or made from hard plastic like my 5 watt charger. The holes in each corner give you the flexibility on how you want to position for maximum sunlight exposure. In my case I laid the panel down on my dashboard and put my big sunshade behind it to protect the dashboard and interior of the truck from the heat and sun fade. The sunshade keeps the panel propped up for best sun exposure. I didn't write the review until I tested it out the same way I tested the 5 watt panel, by waiting a week to see if my new battery (Northstar AGM- NOT RECOMMENDED due to it going dead within 10 days of inactivity and VERY poor warranty support-see my review) would be able to start my truck (Nissan Murano). The Murano has a 3.5 liter engine, not a big engine by any standard yet I have to keep a solar charger on it in order to prevent the battery from draining on me. The charger has been on my truck for about 3 weeks now and whenever I decide to go for a drive my truck starts right up with no issues. I disconnect the charger before I start the truck and when I come home I reconnect it. A bit of a pain in the neck but it guarantees that my truck will always start no matter how long it sits in my driveway I can see this charger might have other uses too. It could be used in a camping situation to charge battery packs or an emergency situation as well. The only minor quibble I have is that the panel does come with a small controller attached to the back to let you know that the charger is charging. There are 3 lights on this little controller. One to let you know that it's receiving sunlight so that it can function. Another LED to let you know that it's charging whatever battery you have it attached to. Then there is a third LED, a green one. Once an item is fully charged the green light is supposed to come on. I have yet to see this green light come on but the charger does work as it's intended. Update 5-29-21- The green light on the controller does appear to function! I noticed the other day after having my truck sitting with the charger attached the green light on the back of the solar panel was on! Apparently my battery must have been low and it took time for the charger to top off the battery. Highly recommended -------------------------------------------------------------------------------------------------------------------------- I rely heavily on reviews when I make purchases so I put some time into reviewing everything I buy on Amazon for personal or business use so I can help other people considering that item. If you found my review helpful, please consider hitting the "helpful" button below when it asks if the review is helpful. Thank you! ... show more
Reviewed in the United States on March 30, 2021 by Invoxicated Invoxicated
    • Very easy to install, works without direct sunlight, though is most efficient with direct sunlight.
Size: 20W Color: White
I am using this to maintain the batteries in the semi tractor I use. As a warehouse manager I have a semi that gets used to run materials out to large construction projects, as well as shuttling trailers in and out of docks as needed. Our tractor can set for days at a time between uses. Using a solar charger / maintainer frees up an outlet and keeps the batteries fully charged and ready when needed. During warm weather when the tractor does not need to have its block heater plugged in, we can park it anywhere and keep the batteries fully charged. ... show more
Reviewed in the United States on December 13, 2023 by Mike Kibler
    • solid panel
Size: 10W Color: White
The solar panel seems to be quite solid..everything is nicely packed..only problen/concern I have is the eyelets and clamps have small amount of wire attached to get to plug, the panel has plenty of wire to get to battery area, here is the problem, if you want to disconnect the panel you have to raise hood. disconnect from battery wires, un-route wires to get back to panel.. How about making it easier to disconnect panel as in longer wires from battery atachment to allow wires to stay in routed area and unplug closer to panel..would make things so much easier epecially in poor weather conditions.. other than that seems to keep battery charged as advertised, just do some wiring changes ... show more
Reviewed in the United States on December 25, 2023 by aghooters
    • Drained battery - recommend adding blocking diode on positive charging wire if you want to use it.
Size: 10W Color: White
Seemed to work great during the Summer but when Winter came, it seems to have completely drained the battery of a parked car. Tested it outside of the vehicle and the controller on back of panel would not shut it off when the panel voltage got below 13 volts and instead would start a battery drain. On Winter days there is more time at below 13 volts than above. Have now added an external blocking diode to the positive charge cable to prevent the battery being drained by the panel and will see how that holds up. ... show more
Reviewed in the United States on December 28, 2023 by Fixer
    • Bad specs, decent panel, watch out for max V
Size: 10W Color: White
TEST RESULTS: 20V before connecting to battery, 450mA into a car battery at 12.3V = 5.5W. Not bad for December in CA, BUT that's peak output at noon exactly facing the sun. (That's half the rated wattage, but you will get more in summer and you might get more with a discharged battery. Probably not 10W.) Put a dime sized shadow anywhere on the panel and it basically shuts down because the cells are on series. No bird droppings allowed!! No load voltage is 20V, enough to damage circuitry and small batteries. Returning for that reason alone. ORIGINAL REVIEW: They say 10 watts in the description, but the panel says 555 mA... so to provide 10W at 0.555A it must run at 18V. Max safe charge voltage is 14V for most lead acid batteries, especially for long term maintenance. More than that will cook the battery. I don't yet know if it's underpower or overvoltage, but it's not as described. ... show more
Reviewed in the United States on December 7, 2023 by S Eckert

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