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Availability:
20 left in stock
Arrives
Friday, Sep 18
Size: 20W Smart
Color: Black
Features
- HIGH EFFICIENCY MONOCRYSTALLINE DESIGN: Premium monocrystalline solar cells; higher power than same-size polycrystalline panels; same power in more compact size; stable output in low-light and cloudy conditions
- SMART BATTERY OPTIMIZED CHARGING: Built-in intelligent charge controller; optimized charging algorithm prevents overcharging; over-voltage; deep discharge; safely recharges batteries; extends battery service life and performance
- FULLY AUTOMATIC MAINTENANCE-FREE: Auto stops charging when battery is full; auto resumes charging when battery voltage drops; 24/7 fully automatic operation; no-maintenance battery care for daily use
- VISUAL CHARGING STATUS INDICATORS: 3 clear LED indicator lights for at-a-glance monitoring; blue for sunlight detection; red for active charging; green for fully charged battery; no guesswork needed
- WIDE BATTERY & SCENE COMPATIBILITY: Compatible with all mainstream 12V rechargeable batteries: sealed lead-acid; lithium; LiFePO4; GEL; AGM; flooded; fits for cars; boats; RVs; lawnmowers; dump trailers; campers; trucks; off-grid devices like electric fences; gate openers; security cameras
- FULL SAFETY PROTECTIONS & IP67 WATERPROOF: Built-in multiple circuit protections: over-charge; over-discharge; over-voltage; over-current; short circuit; reverse polarity; over-temperature; fully sealed IP67 waterproof and dustproof design; withstands rain; snow; extreme temperatures and all harsh outdoor conditions
- EASY INSTALL & RELIABLE WARRANTY SUPPORT: Ultra-lightweight flexible design; suction cups and carabiners for combined use; tool-free plug-and-play setup; easily adheres to car front windshields; SUNAPEX provides 1-year workmanship warranty; 24/7 professional customer service; ongoing technical assistance for all product questions
Description
Harnessing Sun's Power for YouMeet SUNAPEX, a brand dedicated to capturing the sun's boundless energy with innovative solar battery chargers. Born from a passion for green tech, we craft powerful, portable solutions for on-the-go lifestyles. Certified by UL & CE, our chargers ensure reliability and safety. Join our mission towards sustainability, reducing carbon footprints and embracing renewable energy. Light up your journeys sustainably with SUNAPEX. With 6V,9V,12V output, compatible with most trail cameras. Built-in 7500mA battery.
Brand: SUNAPEX
Material: ETFE
Product Dimensions: 13.7"L x 1.5"W x 14.96"H
Item Weight: 1.06 kg
Efficiency: 30% High Efficiency
Efficiency: 30% High Efficiency
Amperage Capacity: 1.11 A
Maximum Voltage: 12 volts
Upper Temperature Rating: 140 °F
Maximum Power: 20 watts
Special Features: Built-in charge controller, visual charging status indicator, IP67 waterproofing, easy installation
Output Voltage: 12 volts_of_direct_current
Connector Type: SAE
Item Dimensions L x W x H: 13.7"L x 1.5"W x 14.96"H
Item Weight: 1.06 kg
Material Type: ETFE
Brand Name: SUNAPEX
Included Components: 1 X 20W Solar panel +1 X Cigarette lighter+1 X Alligator clip+1 X O-ring wire +1 X Manual
Model Number: SA_RX2OW_B
Unit Count: 1 Count
Number of Items: 1
Item Highlight: Waterproof Flexible Solar Panel Kit | Prevents Overcharging with Smart Controller | Fits 12V Batteries for Boats, RVs & More
Manufacturer Warranty Description: SUNAPEX provided lifetime technical support and 12 -month replacement warranty from the date of purchase
Item Type Name: solar panel
Manufacturer: SUNAPEX
Manufacturer Part Number: 20W black solar panel
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Sep 18
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/51Pe1q6RSeL._AC_US500_.jpg)
Top Amazon Reviews
Size: 20W Smart
Color: White
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!
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Reviewed in the United States on March 30, 2021 by Invoxicated
Size: 20W Smart
Color: Black
I was having issues with my battery on my Travato going dead. As someone who likes to Boondock, I can’t take any chances that I will be in the middle of nowhere and my chassis battery won’t work. Having this little gadget attached to my battery, assures me that that won’t happen. I put the solar panel with the accompanying section cups on my front windshield and then I attach the leads to my battery under the hood of my van. It works like a charm at keeping my battery topped off. Whenever I’m gonna be sitting longer than 24 to 48 hours, I make sure that I put it on.
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Reviewed in the United States on May 1, 2026 by Bahamamama
Size: 20W Smart
Color: Black
Unfortunately they do not recognize batteries under a certain voltage, so if the battery loses charge enough overnight they will not try to charge them once the sun comes up. That said, they are definitely still useful and keep all my batteries topped off. Very useful for cars atvs and mowers that still have decent life in their batteries to prevent them from declining and staying so low they go bad. I particularly like being able to hop on my mower without needing to recharge the battery in the spring.
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Reviewed in the United States on May 20, 2026 by Anonymous
Size: 20W Smart
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 Smart
Color: Black
We purchased this trickle charger for our RV that is in a safe outdoor lot but we do not have electricity. It keeps our RV batteries charged well. It attaches to the windshield and stays secure with 4 suction cups. It does a great job.
Reviewed in the United States on May 27, 2026 by K. Smith
Size: 20W Smart
Color: Black
Super easy to install and works perfectly. My vehicle sat unused for months through a cold winter and started with no hesitation
Reviewed in the United States on June 18, 2026 by Gilmour
Size: 20W Smart
Color: Black
These solar powered trickle chargers are amazing in the right application. We use them on our job trailers that require batteries to operate the lifts, the winches, or other accessories. They perform well, and we abuse them far too often. We have only had to replace one in our application, but that was our fault. The solar panel may be a little large for some applications, but it does provide the voltage and battery charge that we require on our equipment. It is light in terms of weight, but it is heavy on performance. Carabiners and suction cups offer the end user many ways to mount it, and with its small size, it can fit just about anywhere.
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Reviewed in the United States on November 7, 2025 by Justin Harkins
Size: 20W Smart
Color: Black
Green full charge indicator light doesn't work. Manufacturer is aware of this defect because they included a small voltage indicator that you can check the voltage at the battery, Nobody is going to want to open his car hood and connect the voltage indicator to the battery every time to see if the battery is fully charged. The manufacturer's QC should have rejected the panel and NOT shipped it out.
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Reviewed in the United States on July 30, 2026 by Dave