---
product_id: 598022907
title: "Sun Energise 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"
brand: "sun energise"
price: "€ 544.48"
currency: EUR
in_stock: true
reviews_count: 5
url: https://www.desertcart.sk/products/598022907-sun-energise-20w-12v-solar-powered-battery-charger-and-maintainer
store_origin: SK
region: Slovakia
---

# 20W high-efficiency solar power IP65 waterproof for all-weather use Smart MPPT tech with 99% tracking efficiency Sun Energise 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

**Brand:** sun energise
**Price:** € 544.48
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay charged, stay unstoppable — power your adventures with smart solar energy!

## Quick Answers

- **What is this?** Sun Energise 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 by sun energise
- **How much does it cost?** € 544.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/598022907-sun-energise-20w-12v-solar-powered-battery-charger-and-maintainer)

## Best For

- sun energise enthusiasts

## Why This Product

- Trusted sun energise brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Monitoring:** LED indicators keep you instantly informed on charging status and battery health.
- • **Maximize Battery Life:** Advanced 3-stage charging protects and extends your 12V battery’s lifespan effortlessly.
- • **Weatherproof & Rugged:** Built with tempered glass and corrosion-resistant ABS to brave hail, UV, and snowstorms.
- • **Plug & Play Convenience:** SAE connectors and pre-drilled frame make installation a breeze—no tech skills needed.
- • **Universal Compatibility:** Perfect for gel, AGM, LiFePO4 & more—ideal for cars, boats, RVs, and outdoor gear.

## Overview

The Sun Energise 20W 12V Solar Battery Charger & Maintainer features cutting-edge MPPT technology delivering up to 99% tracking efficiency and 98% peak conversion. Its IP65 waterproof design and durable tempered glass frame ensure reliable outdoor performance in extreme weather. Equipped with smart 3-stage charging and multiple safety protections, it maintains and extends battery life for a wide range of 12V batteries. Easy plug & play installation and LED status indicators make it the perfect solar solution for cars, boats, RVs, and more.

## Description

20 Watt 12 Volt Waterproof Solar Trickle Battery Charger & MaintainerHigh efficiency poly crystalline solar cells, works great in all days.LED work statue indicator, battery power indicator, error warning indicator, all statues are clear.IP 65 waterproof design to prevent components from oxidizing into water, no worry to place it outside in all seasons.Over charge protection, over discharge protection, reverse polarity protection and short circuit protectionDurable ABS frame and tempered solar glass, well built for years usage.Plug & Play SAE connectorEquipped with 3-piece connection cable kits, battery clamp, cigarette lighter and bare wire. Each of them is equipped with SAE connector, plug and play, easy & simply to connect and disconnect, no need to recognize positive or negative.Note: As this is 20w solar panel main function is maintain battery, not for full charging your battery

## Features

- Smart MPPT Technology: This 12v solar 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: This 12 volt 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 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 tender, a variety of scenarios for car, boat, RV, dump trailer, marine, camper, lawnmower, motorcycle, jet ski, tractors, trucks, ATV, trolling motor, etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Sun Energise |
| Manufacturer | hd |
| Model | SE20W-PRO |
| Product Dimensions | 51.05 x 35.05 x 1.78 cm; 2.36 kg |
| Item model number | SE20W-PRO |
| Special Features | waterproof |
| Wattage | 20 Watts |
| Batteries Included | No |
| Batteries Required | No |
| Battery cell composition | Lead Acid |
| Material | Glass, Polycrystalline Silicon, Tempered Glass |
| Includes Rechargeable Battery | No |
| Manufacturer | hd |
| Country of Origin | USA |
| Item Weight | 2 kg 360 g |

## Product Details

- **Brand:** Sun Energise
- **Colour:** Green
- **Product Dimensions:** 51.1D x 35.1W x 1.8H Centimeters
- **Item Weight:** 5.2 Pounds
- **Output Voltage:** 12 Volts

## Images

![Sun Energise 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 - Image 1](https://m.media-amazon.com/images/I/81OysApJuPL.jpg)
![Sun Energise 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 - Image 2](https://m.media-amazon.com/images/I/813Cxg1ARzL.jpg)
![Sun Energise 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 - Image 3](https://m.media-amazon.com/images/I/81ZHpUae0wL.jpg)
![Sun Energise 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 - Image 4](https://m.media-amazon.com/images/I/81E4bMBzB-L.jpg)
![Sun Energise 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 - Image 5](https://m.media-amazon.com/images/I/71eQ-PhfjVL.jpg)

## Questions & Answers

**Q: Have two batteries in my boat, can I use solar charger for both**
A: Thanks for your interest in our solar boat battery charger.
Yes, you can use solar charger for both two batteries in your boat.
The solar charger was desinged to cahrge 12V battery, so, if your 2 batteries are 6V, make sure they are in series; if the 2 batteries are 12V, make sure they are in parallel.

**Q: for a minimal use auto will this unit gain back power lost in batt to start auto in a 1 or 2 hr time frame.**
A: While the Solar battery charger isn't designed or promoted as a fast charging unit, nevertheless, I would think it bring the battery up enough to provide the power needed to start a car. I use my charger to "top off" any power loss that might occur even with constant and frequent usage. If the electrolyte in each cell of your battery is up to capacity, then the Solar Charger should charge your battery sufficiently after one or two hours. If the battery cells are low of electrolyte, then the cells should be topped of with distilled water and then begin charging. Otherwise, any effort to charge a battery that is low on electrolyte will be a waste of time.

**Q: Can I keep this permanently connected to my car battery even while driving? If not what else do I need?**
A: I would not leave this connected when driving as the vehicle charging system *may* feed back into the regulator system of the solar panel. Just remove it when you are operating your vehicle on a regular basis and re-install when you are leaving your vehicle in long term storage.

**Q: Can I use 1 solar panel and 1 to 3 wire splitter to maintain 3 battery banks?**
A: Thank you for your support to our solar battery maintainer.
The 12volt solar battery charger waterproof was desinged to charge 12V battery, so if the 2 batteries are 12V, make sure they are in parallel.
And we also suggest that one solar trickle charger for one 12volt battery.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Has worked really great
  

*by K***E on Reviewed in the United States on 16 March 2024*

It has worked great! It has kept my battery good and it was always charged when i needed it!

### ⭐⭐⭐⭐⭐ 







  
  
    Will work form the inside of a car
  

*by A***T on Reviewed in the United States on 29 September 2023*

This is my second solar panel battery maintainer that I have bought from this company.  I was happy with the first one and this one is even better.There are two great things with this new panel.One, on the collector panel itself, there is a little light that indicates when the panel is receiving and generating solar electricity or not working properly… Super handy.Two, this panel has a great advantage in that I can be put up to a window, and it will generate electricity.  It does not need to be mounted outside the car.  The big benefit is that it is inside the car and when I lock the car the panel is safe and secure.  Anyone that uses the panel can just put it on the dash or in the rear window.  I put my panel in a tinted window that faces south and even though the window is coated with a sunscreen It still produces enough electricity to maintain the battery.I have included a picture taken from the outside of the car showing the panel through the tinted window which is coated with solar film.  The panel is on the inside of the car where it is collecting sun and working great.Thanks for the great product. I am very happy.

### ⭐⭐⭐⭐⭐ 







  
  
    It will probably keep a battery topped off
  

*by S***. on Reviewed in the United States on 15 May 2023*

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.

## Frequently Bought Together

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-22*