FlexSolar 20W 12V Solar Panel Battery Trickle Charger Maintainer Kits | Built-in Charge Controller, Cigarette Lighter, Alligator Clips, O-Rings OBDII Connector for Car, Truck,Tractor, Boat
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Availability:
In Stock.
Arrives
Tuesday, Sep 22
Color: TC-20W
Features
- High-Efficiency Monocrystalline Core Precision-engineered with premium monocrystalline cells delivering 20%-25% photoelectric conversion efficiency (STC), outperforming polycrystalline and amorphous counterparts in energy yield under equivalent conditions.
- Ultra-Thin & Flexible Design (0.11in, Coin-Thin)At only 0.11 inches thick (as thin as a coin), this flexible panel conforms to curved surfaces. Install on windshields, sunroofs, or boat decks with included suction cups and carabinersno drilling required, no bulky setup.
- 4 Plug-and-Play Charging MethodsComes with 4 connection options: cigarette lighter plug, alligator clips, OBDII adapter, and ring terminals. Plug-and-play setup works for cars, boats, RVs, and motorcyclesno complicated wiring needed.
- Sustainable Energy Autonomy Solar-powered preservation ideal for infrequently used assets. Proactively combats parasitic drain from vehicle telematics/alarms, ensuring instant start readiness. Engineered for battery longevity, not deep-cycle recharge.
- Fail-Safe Charging Intelligence Integrated smart controller enables autonomous charge cycling - halting at full capacity, reactivating upon voltage drop. Guarantees zero reverse current discharge for perpetual battery safeguarding.
Brand: FlexSolar
Material: Monocrystalline Silicon
Product Dimensions: 15.9"L x 11.9"W x 0.11"H
Item Weight: 1.7 pounds
Included Components: Carabiner×4,Sucker×4, SAE to OBD-Ⅱ, SAE to alligator clip, SAE to car charger, SAE to terminal
Maximum Voltage: 12 volts
Maximum Power: 20 watts
Special Features: Lightweight Design, Travel, Water Resistant
Output Voltage: 12 volts_of_direct_current
Connector Type: SAE
Item Dimensions L x W x H: 15.9"L x 11.9"W x 0.11"H
Item Weight: 1.7 pounds
Material Type: Monocrystalline Silicon
Brand Name: FlexSolar
Included Components: Carabiner×4,Sucker×4, SAE to OBD-Ⅱ, SAE to alligator clip, SAE to car charger, SAE to terminal
Model Number: YL-20W-TC
Unit Count: 1 Count
Manufacturer: FlexSolar
Manufacturer Part Number: 20w-E
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Sep 22
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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![[Ultra]ECO-WORTHY 12V 400W Complete Solar Panel Kit for RV Off Grid Trailer](https://m.media-amazon.com/images/I/71FJ2xh8+dL._AC_US500_.jpg)
Top Amazon Reviews
Color: TC-20W
I bought this FlexSolar 20W 12V solar panel charger to keep the lead acid batteries healthy on cars I do not drive very often, and it has worked out extremely well. Before using this, I was replacing lead-acid batteries far more often than I should have. Since adding these maintainers, I have avoided that yearly battery replacement cycle, which has easily saved me hundreds of dollars. I currently use one on a Honda Civic and a Dodge Ram. What I like most The biggest benefit is simple: it helps keep seldom driven vehicles ready to go. Instead of worrying about a weak or dead battery, I can leave this connected and have much better peace of mind. Flexible connection options I also like that it gives you more than one way to hook it up. The OBD2 option is convenient, and the terminal post connection is there if that works better for your setup. That flexibility makes it easier to use on different vehicles. Good enough to buy again I liked it enough that I bought another one as a gift for family. That usually says more than anything else for me. If I trust a product enough to spend my own money on a second one for someone else, it has proven itself. Bonus confidence Project Farm also reviewed this on YouTube and gave it very high praise. That matched my experience, and it made me feel even better about the purchase. Bottom line If you have cars, trucks, or other vehicles that sit for long periods, this is a smart buy. It has saved me money, helped extend battery life, and given me a reliable maintenance option without much hassle. Easy 5 stars.
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Reviewed in the United States on April 13, 2026 by Matt
Color: TC-20W
Its square, flat and feels like stiff plastic. Not your usual looking or feeling solar panel. I found that it works great. Can easily keep my marine and garden batteries charged with its 20W charging capability. You have to pay attention to the instructions as it has three very small colored LED lights underneath and together with their lit/not-lit combination they provide the charging status of the battery. I would highly recommend this unit as its weatherproof and able to charge faster than most. It is a little larger than most as well so watch the dimensions as its going to need space to be used properly.
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Reviewed in the United States on July 7, 2026 by James Whitney
Color: TC-20W
Well worth the money and an Awesome product -- FlexSolar 20W 12V Solar Panel Battery Charger I purchased two of these and I have them inside the vehicle on the dashboards.. They work as expected but of course with being inside the vehicle you will not receive the full power -- So do not expect to receive the full power when behind vehicle windows you will set yourself up for a let down! Recommendation(s): 1. Fully charge your battery (or as close to fully charge) -- It's easier for the solar panel kit to keep the battery charged 2. Purchase a 10a mppt solar charge controller -- Why? especially if you are using your ODBii as your charging point you do not want to possibly cause any serious electrical issues. Charging is regulated meaning: when your battery is fully charged, there is no excessive power being pushed into the battery or electrical when using the ODBii or DC outlets 3. Inline fuse's -- Use one inline fuse before the mppt controller and one after the mppt controller. Protect your mppt controller, your battery, potentially your electrical system, etc.
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Reviewed in the United States on May 15, 2026 by Whatever
Color: TC-20W
Great that it comes with several adapters to attach. The 12v plug adapter didn't work on our vehicles as they go off ten minutes after engine shutdown. The OBDII adapter worked perfectly. ONE CAVEAT!! Cover the panel with a towel or be in the shade when you plug it in. I had two vehicles blow the OBDII fuse when I plugged them in while the sun was overhead. No problems under continuous use and plugged in 24/7, even while the vehicle is in operation. Our vehicles were losing batteries when they sat for a few weeks due the computers running all the time. This completely solved that issue. No more flat batteries since installation in several vehicles.
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Reviewed in the United States on May 11, 2026 by H2Cobra
Color: TC-20W
This panel works great. It holds up well inside of a vehicle and direct sunlight. It seems to have the diode to keep power from reversing in dark darkness. There are indicator lights that show when the panel and when it is reached a full charge. It Does a great job keeping my car battery topped up at the car sitting for a while.. I gave my first panel to my father-in-law and purchased another panel for my car. If you were considering getting one of those smaller 5 W panels don’t this one is way better.
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Reviewed in the United States on July 9, 2026 by jennn
Color: TC-20W
3 days direct sunlight, no charge, actually they discharge, I returned the panel for another one ,and it doesn't charge also. So i will return it also ..I have newer duel AGM odyssey batteries in my diesel pickup. Going back to the extension cord.
Reviewed in the United States on June 17, 2026 by Bud
Color: TC-20W
The clips work great but, I tried to use the OBD connector [more secure/safer and better hidden and quick to unplug] but, it's not working! I tried to contact the seller for a couple weeks and no reply!
Reviewed in the United States on May 4, 2026 by D. W.
Color: TC-20W
I have a Nissan NV 2500 that I need to keep topped off when I’m not using it. This little baby keeps me anywhere between 12 eight and 13.3 on my voltmeter with the battery. No wires running to the garage under the garage door with an electrically plugged in battery tender this thing just gets the job done for a reasonable cost.
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Reviewed in the United States on July 11, 2026 by Bobbie S