20W 12V Solar Powered Battery Charger & Maintainer, Built-in Smart MPPT Charge Controller, Waterproof 20 Watt 12 Volt Solar Panel Trickle Charging Kits for Car Auto Boat RV Marine Trailer
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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Tuesday, Jun 24
Features
- Smart MPPT Technology: This solar panel battery charger comes with built-in protection system. The innovative MPPT technology allows to deliver high tracking efficiency of up to 99% and peak conversion efficiency of 98%, improve 20%-30% utilization rate
- Upgrade 3-stages Charging: The smart 3-Stages charging algorithm (Bulk, Absorption, Float) ensures charging safer and maintains 12 volt battery at a stable level for extending battery life and avoiding overcharge, no additional maintenance
- Easy To Monitor: The LED indicator allows to monitor the working status. The charging will be cut off when battery fully charged and resumed automatically when battery drained, easily judge if the solar battery charger is charging well
- Full Charging Protection: Solar battery charger equipped with multiple protection includes over-charge/discharge, over-voltage, over-current, over-load, short circuit, reverse polarity, over-temperature, IP65 waterproof and spark-proof, fully protected
- Compatible with Multiple Batteries: Widely used as a solar trickle charger and advanced solar battery charger maintainer for multiple 12 V batteries including gel, Deep Cycle, SLA, Flooded, AGM, Seal-Lead Acid and LiFePO4 lithium battery
- Robust and Durable Material: Made of A+ mono solar cells with efficiency up to 21%-30%. Strong tempered glass+corrosion-resistant ABS frame, withstand extreme weather conditions like UV, hail, sandstorm, up to 2400 Pa wind pressure and 5400 Pa snow load
- Easy to Install and Use: The outdoor solar trickle battery maintainer comes with pre-designed holes on solar panel frame which allows for quick installation. Note: all cables are plug and play, just simply connect it to required device
- Wide Range of Applications: An automatic and smart solar battery charger, a variety of scenarios for car, boat, RV, dump trailer, marine, camper, lawnmower, motorcycle, jet ski, tractors, trucks, ATV, trolling motor, etc
Brand: Sun Energise
Color: Green
Product Dimensions: 20.1"D x 13.8"W x 0.7"H
Output Voltage: 12 Volts (DC)
Specification Met: IP65
Manufacturer: Sun Energise
Brand: Sun Energise
Item Weight: 4.99 pounds
Product Dimensions: 20.1 x 13.8 x 0.7 inches
Country of Origin: China
Item model number: SE20W-PRO
Manufacturer Part Number: SE20W-PRO
Wattage: 20 watts
Date First Available: August 6, 2021
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Jun 24
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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- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: SE-20WPRO
Waited two years to write this review so here goes, My solar panel is installed on the back of my pontoon screwed to the railing, its charging 3 deep cycle batteries that run the pontoon and 1000watt stereo system on it I have yet to run the batteries dead on the lake with the radio and everything running hard for more than 12 hours straight the panel has been exposed to all elements rain and snow, It keeps my batteries charged year round I was amazed how well it works and easy to install it was definitely worth the money I spent on it to have my batteries well maintained and ready to rock when we roll out on my party barge
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Reviewed in the United States on June 23, 2024 by LovesAmazonShopping LovesAmazonShopping
Size: SE-20WPRO
Seems like a good idea. I think it works well if there isn’t a load on your battery and it just needs topping off. I tried using this in an RV setting. When the battery was fully charged it did well. However, if cell phone chargers dropped the voltage to at or below 9 volts it quit working. It would just flash like it wasn’t getting good sun. However, start up the vehicle and all of sudden without moving it then it said the sun was good and it was working. I tried putting on the dash and inside the vehicle. It warped in about a week. Not sure why, other plastic things on the dash right next to it didn’t have this problem. I tried placing on the roof of the vehicle with the generous cord size. Strangely, it didn’t improve performance. If the battery is fully charged then it on green steady and shows working. But if your battery drops low which is when you need it the most, it quits working and just blinks green. It probably very useful in other applications. ---------- Edit support reached out to me and replaced the unit and helped me understand how to use it. It will keep a battery topped off. It isn't designed to keep up with a 3.2 amp charger. Works as intended.
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Reviewed in the United States on May 15, 2023 by Scott C.
Size: SE-20WPRO
Installed on my cabin cruiser, seems to maintain batteries with the electronics running, charges pretty fast, was easy to install and seems really well built and looks good
Reviewed in the United States on September 23, 2024 by Robert H. Robert H.
Size: SE-20WPRO
I'm using this panel with a DC electric fence energizer to keep the deep cycle marine battery that runs it charged. It's out in the elements and so far, is operating well. Considering the panel output and the current draw from the energizer, I might have to add another since it only charges when the sun is up, and the energizer draws current 24/7. I cut off the SAE plug and wired on ring terminals directly to simplify the connection to the battery.
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Reviewed in the United States on January 18, 2023 by Get Real
Size: SE-20WPRO
MY Ford Transit battery is always connected to parasitic loads cause I can communicate with my Transit via Ford Pass App, as such it draws power. After about two weeks the App notifies me that my battery was put in Deep Sleep mode to prevent excess drain. I normally will drive 36 miles one way to the storage lot and check on the health of my battery. I have a Firefly control system in my RV that monitors my chassis and house batteries and I have seen in a 2 week storage period my voltage on my Transit battery go as low as 11.8 volts. I needed to find a better way to top off my battery while in winter storage. My House batteries are Lithium and they are maintained via my roof mounted solar panels and those are no problem. Last winter I paid $120 more per moth to park my RV in a space that had electricity and I would trickle charge my Transit battery via a Noco charger. So I moved to a cheaper parking spot with frontal solar exposure so I could save on my rental fee BUT that meant I needed to address my Transit battery drains. This is where the 20 watt solar tender came in handy. I tested it at first mounted to the outside of my windsheild and within 48 hours moved that one panel inside the windsheild due to HIGH WINDS and fear of the suction cups breaking loose and causing damage. So here is what I posed to my facebook group on the results of testing from Dec 20 th for the first installed panel. I have been testing since Dec 20 th when I had a fully charged Transit battery. I rechecked on Dec 23 th and moved my panel to the inside of the windshield. I rechecked on Dec 28 th and it was holding a 12.6 volts on my Firefly panel. So today I rechecked and still holding 12.6 volts and decided to add a second panel in parallel to my charging current (I wanted two panels for our cars this summer when gone for 6 weeks) I will see if I get more bang for the buck with two panels or if one will do. Stay tuned. VERY happy that I can now comfortably visit the RV once a month and not bi monthly. This ends my woes of DEEP SLEEP MODE. Here is a link to the panel I bought and the splitter required to wire two in parallel. Keep in mind I did move my RV to a spot that gave me better windshield solar exposure. So I plan to go back out to my RV and check the battery status with a second panel installed in parallel as you know from my posting that with LOW LIGHT and Cloudy days my yield from my panels will drop off so I will soon see if that second panel helps to keep my voltage at or above 12.6 volts. I am really excited to have found this solar battery tender solution. Please know that if you live in Florida or a very sunny area during the winter you most likely only need one panel to do the job. I wanted two cause I will use these panels on each of our parked cars when we travel for over a month at a time. Stay tuned for my 2 panel results. Review Written by Smiley husband of Karen E.
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Reviewed in the United States on January 6, 2023 by Karen E. Karen E.
Size: SE-20WPRO
This is the best small solar panel i have bought! Using it full time for few months now!
Reviewed in the United States on December 23, 2024 by Andy
Size: SE-20WPRO
Great trickle charger For my dump trailer. Haven’t plugged it in since I bought this thing way back when.
Reviewed in the United States on February 9, 2025 by Joseph C.
Size: SE-20WPRO
Been using this to charge battery of one my cars that doesn't get used as much as it should. Works great when not overcast then it struggles even then battery stays charged. Will purchase another ones when I get the funds fora boat battery and some more cars might even get one for motorcycle. I can't report on how waterproof it is or not because it's inside the car on the dash. The fact that I would purchase more should tell you what I think of it. Ok I'm out $80 guess should have seen it coming. This unit got a good first review because it did charge battery in car but 8 months out nothing DOA no lights no power out put it has been out of the weather in front windshield of van, and of course the is no warranty after 30 days(should have checked their website before purchase) gotten by Amazon again and shady sellers on ebay. Buyers beware of this seller you will be stuck with a useless oversized paper weight with no warranty except 30 day return policy. My rating went from 5 to zero not one will now look for another unit with some what of a warranty.
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Reviewed in the United States on June 29, 2022 by mrfish52