OYMSAE 20W 12V Solar Panel Car Battery Charger Portable Waterproof Power Trickle Battery Charger & Maintainer for Car Boat Automotive RV with Cigarette Lighter Plug & Alligator Clip
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Size: 20W
Color: Black
Features
- Solar Battery Charge Visualization:The indicator lights can help you understand the charging status: the blue light is on (put in the sun), the red light is on (charging), and the green light is on (charging is complete).A short circuit occurs and all three indicators are off
- Solar Battery Maintainer Intelligent Protection:Built-in charging microprocessor, improved charging algorithm, can provide overvoltage protection, overcharge protection, short circuit protection, etc. It can prevent reverse charging and can be safely used for charging and maintenance of 12 V batteries
- Solar Battery Trickle Charger Higher Conversion Rate:The regular convex points of surface distribution are conducive to the secondary propagation of light, absorb the radiant heat of solar energy to a greater extent, and greatly improve the photoelectric conversion efficiency
- 12v Waterproof Solar Battery Tender Widely Used:The included three-pieces SAE cable kit is plug-and-play,it can be used for cars and 12V batteries. Comes with carabiner and suction cup to meet your different installation needs. Suitable for automobiles, RVs, motorcycles, ships,snowmobile,etc
- 12V Solar Charger More Durable:The PET material can be waterproof and dustproof. A layer of epoxy board is added as a bottom plate, which is more sturdy (the broken panel will cause the charging efficiency to decrease). You can contact us at any time if you have any questions
Product Dimensions: 14.37 x 7.68 x 0.79 inches
Item Weight: 1.4 pounds
Manufacturer: OYMSAE
Item model number: PO-M20W
Is Discontinued By Manufacturer: No
Frequently asked questions
This product is currently out of stock. Please check back later for shipping info.
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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Similar Products
Top Amazon Reviews
Size: 30W
Color: Black
Here are my observations. First off I park facing a 2015 Ram Dually with the 6.7L Cummins facing due east - this gives me the front and side windows to mount two in during rhe winter months, and the side window alone to mount one in dyring the summer. The solar cell mat sits well in the passenger window by itself. And I lay the other in the front dash. These also stay hooked in full time - never being disconnected (stow them on the floor between the passenger seat and the door at the belt base to keep them upright). Truck has an Aftermarket Car Alarm that tends to work the batteries moreso than a normal truck. Truck stays sitting for a week at a time (during summers up to a month, and maybe once or twice like this during the winter) in Buffalo, NY. Batteries are 2-each set of $350 Odyssey H7 Batteries, Absorbed Glass Mat (AGM) P/N ODP-AGM94RH7. First off, I run one solar charger in the summer and two in the winter. What I found was that during the winter, a single one was OK, but due to the amount of snow buildup (and just the lower amount of sun), that I needed two running together to top off the battery. And, that and the fact that they tend to go bad in the winter and I couldn't risk loosing charge on a 4 week run and flatten $700's worth of batteries. Also, Batteries always tend to go bad in single digit weather in January and February. Observations: Brand new I could get the charge to 12.4V during the summer during the first year. The winter's, it's more like 11.8-12.2V; but it honestly couldn't seem to keep up, finding it after two weeks straight at 11.4V at times with just the single charger. On year two I noticed the batteries couldn't seem to go north of 12.2V in the summer. In November, I bought a replacement solar charger as the first one finally went; but then I also bought a second one due to the likelihood that while sitting for several weeks straight, that this one charger failing could take out both of these batteries. So now with two Solar Chargers installed, with a dual-headed 12V splitter (Power Drive PD9223BL 2-way 12V Adapter), I was able to get to 12.2V, and even 11.8V with the windows covered (the side window less than an inch, but the front burried) - honestly, the solar cells still charge somehow. So during rhe winter of 24-25 (and at this time of writing), this configuratuon has worked flawlessly!!
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Reviewed in the United States on February 1, 2025 by J. Voigt
Size: 30W
Color: Black
bought the OYMSAE 30W 12V Solar Trickle Charger to keep the battery on my truck topped off, and I’m honestly impressed by how well it performs. It’s compact, lightweight, and super easy to set up right out of the box. Whether you use the cigarette lighter plug or the alligator clips, installation takes just a couple of minutes—and you’re ready to harness the sun. I’ve been using it for a few weeks now and it keeps my 12V battery healthy and fully charged without overcharging. Even on cloudy days, it still delivers a consistent trickle charge. The built-in smart controller with overcharge protection gives me peace of mind, and I love that it’s completely maintenance-free. It’s perfect for cars, trucks, boats, RVs—basically anything with a 12V battery you don’t use every single day. I keep mine on the dash and let it do its thing. No more dead batteries when I come back from a trip! If you’re looking for a durable, portable, and efficient solar battery maintainer, this is it. Totally worth it.
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Reviewed in the United States on April 21, 2025 by Vanessa Vanessa
Size: 20W
Color: Black
I first received this nice thin and light solar battery charger in the fall of 2022, used it on my stored motor home all winter and seemed to keep the batteries up quite nicely. When I brought the MH back home I noticed the indicator lights were not working at all on the charger, so did not know if the unit was functioning as it should or not. After a few tries of trying to contact the seller they replied and were very nice and sent me out a new unit VERY quickly and for no charge. The new one is working fine with operational indicator lights functioning as they should. Hopefully this replacement unit will continue to work for a lot longer than the first one, as Ireally like this product and want to continue to keep using it. Four stars as the first unit did not last even close to a year.
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Reviewed in the United States on May 17, 2023 by Hal Adkins
Size: 30W
Color: Black
My husband bought the solar charger quite a while ago, but I did not want to do a review until we've used it quite a lot. I must say this wireless portable power bank is amazing. I took my grandchildren to the amusement park and all 4 of us used it during the day to keep our phones charged and it still had plenty of charge left when our phones were full. It truly does have a long battery life. I love the versatility of the chords, where I have an android phone and my grandchildren have iphones. All our phones can be charged from the same charging unit. Only later was I told it was a solar charger and a flashlight which makes it even more useful. It is a bit heavier than our other 10,000 mAh chargers. However, it is also triple the mAh of the other ones at 30,000 mAh. I'm quite happy with the product and definitely give it a five star.
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Reviewed in the United States on July 22, 2025 by Woodland Hills Candy
Size: 20W
Color: Black
You should buy this. Have been using for about 10 months. Have it tied to propane tanks on the front of the RV to charge a deep cycle battery, for the slide and generator... Works awesome no more jumper cables
Reviewed in the United States on September 5, 2025 by Rita R.
Size: 20W
Color: Black
Purchased this when I put a new battery in my truck that I only use occasionally 3-4 times a year so the battery would stay charged. It seemed to do fine for 8 months, then I went to use my truck and the battery was absolutely totally dead. After placing the battery on a NOCO charger for a day, it was charged fine. I used the truck for a couple of days and no issues. Plugged this solar charger back in and a week later the battery was too weak to start the truck. Charged it again with my NOCO charger for a day and the battery was good to go. Did not put the solar charger back on and two weeks later the battery was still charged great and starts the truck great. Plugged the solar charger back in and two days later the battery was almost too weak to start the truck. Charged again with the NOCO charger and did not put the solar charger back on the battery. Battery is still good without any charging since a month ago. Only conclusion is the solar charger now kills/drains the battery. Not good.
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Reviewed in the United States on January 14, 2025 by Kenneth Rhyne