---
product_id: 538202047
title: "40A DC to DC Battery Charger with Anderson Plug Reverse Charge Solar Input MPPT for AGM, Gel, Calcium, Lead Acid, LiFePO4 Batteries of 4WDs, RVs, Campers, Trailers On-Board Charger"
brand: "atem power"
price: "€ 234.00"
currency: EUR
in_stock: true
reviews_count: 11
category: "Atem Power"
url: https://www.desertcart.ie/products/538202047-40a-dc-to-dc-battery-charger-with-anderson-plug-reverse
store_origin: IE
region: Ireland
---

# 40A high-current output Reverse charge for dual-direction power flow MPPT solar input for max efficiency 40A DC to DC Battery Charger with Anderson Plug Reverse Charge Solar Input MPPT for AGM, Gel, Calcium, Lead Acid, LiFePO4 Batteries of 4WDs, RVs, Campers, Trailers On-Board Charger

**Brand:** atem power
**Price:** € 234.00
**Availability:** ✅ In Stock

## Summary

> 🔋 Charge smarter, adventure longer — power that keeps up with your wild side!

## Quick Answers

- **What is this?** 40A DC to DC Battery Charger with Anderson Plug Reverse Charge Solar Input MPPT for AGM, Gel, Calcium, Lead Acid, LiFePO4 Batteries of 4WDs, RVs, Campers, Trailers On-Board Charger by atem power
- **How much does it cost?** € 234.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/538202047-40a-dc-to-dc-battery-charger-with-anderson-plug-reverse)

## Best For

- atem power enthusiasts

## Why This Product

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

## Key Features

- • **Power Up Fast & Smart:** 40A output with boost converter charges LiFePO4 batteries faster than standard relays.
- • **Solar-Ready MPPT Tech:** Harness solar energy efficiently with built-in MPPT controller for stable, optimized charging.
- • **Plug & Play Simplicity:** Anderson plug and intuitive SELECT button make switching battery types and setups effortless.
- • **Reverse Charge Mastery:** Easily revive flat starter batteries from auxiliary power—never get stranded off-road again.
- • **Built to Endure & Protect:** Comprehensive safeguards including reverse polarity, overvoltage, and temperature protection for worry-free use.

## Overview

The ATEM POWER 40A DC to DC Battery Charger is a rugged, versatile on-board charger designed for 4WDs, RVs, campers, and trailers. Featuring a high-current 40A output, MPPT solar input, and reverse charge capability, it supports AGM, Gel, Calcium, Lead Acid, and LiFePO4 batteries. Its intelligent 3-stage charging and boost converter optimize battery health and charging speed, while robust safety protections ensure reliable, quiet operation in demanding environments.

## Description

Buy ATEM POWER 40A DC to DC Battery Charger with Anderson Plug Reverse Charge Solar Input MPPT for AGM, Gel, Calcium, Lead Acid, LiFePO4 Batteries of 4WDs, RVs, Campers, Trailers On-Board Charger: Battery Chargers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Appears to be a very well-made unit!!! - I have to say I was skeptical at first reading some of the reviews but this DC to DC charge controller works amazingly well. I got the 25 amp model and it provides 24.9 to 25 A without any issue. It charges the lithium iron phosphate battery, far quicker than just having a direct connection with a relay to my start battery, the relay would engage when the alternator started putting out power but I noticed I was only charging in about 17 A MAX because the voltage was not quite high enough as the vehicle battery was a lead acid battery and that charged around 13.8V…but the lithium ion battery would like to see 14.6 so this actually has a boost converter in it that will raise the voltage from the 13.8 available in the car to about 14.8 V to charge the lithium, iron phosphate battery, it appears to have a smart regulating technology in it , so it does not give too much voltage to the battery but enough for it to charge quickly. Overall, it’s very well-built, easy to use. Has a nice heat sink that does not require the use of a fan to keep it cool, this is a nice feature, so I don’t have to listen to any noisy fans as it was very quiet and it appears to , keep my lithium battery very happy
Review: Effective product - Great product, reliable

## Features

- Reverse Charging Ready: Take command of your off-road escapades with our DC to DC battery charger. Our DC to DC battery charger is a versatile creation, allowing you to charge in both directions. Simply activate the reverse charge button to effortlessly revive a flat start battery using your auxiliary battery. Keep your starter battery fully charged and ready for thrilling off-roading experiences.
- Unparalleled Compatibility & Efficiency: Our charger is designed to seamlessly work with a wide range of battery types, including AGM, Gel, Calcium, Lead Acid, and LiFePO4 batteries. It harnesses the power of DC input before solar charging, ensuring a stable and consistent energy source. With smart alternator compatibility and MPPT controller inside, it is engineered to exceed your expectations.
- Extend Battery Lifespan to the Max: Embrace our advanced DC to DC charger with an intelligent 3-stage charging process that optimizes efficiency and maximizes the lifespan of your batteries. This ensures they remain in top condition for extended periods. Moreover, our charger features an intelligent LiON mode that automatically activates your sleeping LiFePO4 battery, ensuring prolonged and reliable use.
- Unbeatable Protection and Dependability: We understand the demanding conditions you encounter, which is why our DC to DC charger prioritizes safety above all else. Engineered with comprehensive protection features, including reverse polarity, overvoltage, over-temperature, charge timeout, and lithium battery BMS safeguards, this in-vehicle DC to DC battery charger ensures worry-free charging.
- Easy Operation at Your Fingertips: Enjoy hassle-free operation with our intuitive "SELECT" button, enabling easy switching between batteries. Perfect for 4WDs, caravans, RVs, trucks, campers, trailers, campervans, commercial vehicles, and boats. Equipped with Anderson-style plugs, it seamlessly integrates into your power setup. Rest assured with our 1-year warranty, a testament to our commitment to quality.
- DC Charging Priorty: This dc-dc battery charger is set with DC priority. When both solar panels and DC meet the startup conditions, the vehicle battery input would be selected priorly. Even when the solar panel input is already in the charging process, the controller will still detect in real-time whether the DC input meets the charging conditions. Once the dc input is satisfied with the charging condition, it will automatically switch to DC power supply.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BYMM55LL |
| Best Sellers Rank | #137,618 in Automotive ( See Top 100 in Automotive ) #572 in Battery Chargers |
| Customer Reviews | 4.2 4.2 out of 5 stars (31) |
| Date First Available | March 16, 2023 |
| Item Weight | 3.19 pounds |
| Manufacturer | ATEM POWER |
| Product Dimensions | 5.59 x 7.48 x 1.97 inches |

## Product Details

- **Brand:** ATEM POWER
- **Color:** gray
- **Item Weight:** 1.45 Kilograms
- **Output Voltage:** 24 Volts (DC)
- **Product Dimensions:** 5.59"D x 7.48"W x 1.97"H

## Images

![40A DC to DC Battery Charger with Anderson Plug Reverse Charge Solar Input MPPT for AGM, Gel, Calcium, Lead Acid, LiFePO4 Batteries of 4WDs, RVs, Campers, Trailers On-Board Charger - Image 1](https://m.media-amazon.com/images/I/718cPqtOESL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Can I use this to charge a second battery in the back of my cargo van? Without a solar panel.**
A: that's what it's for so yes.
the solar is not required.

**Q: If I use solar panel does this also charge starter battery?**
A: Depends on how the unit is connected and the voltage the panel is supplying.

**Q: How many Anderson Plugs does it come with?**
A: It comes with 3. One for solar input. Battery output and 12v charge input

**Q: What is the rating of the solar panel that will work with this unit?**
A: About 12 to 24 volts.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Appears to be a very well-made unit!!!
*by C***S on September 21, 2025*

I have to say I was skeptical at first reading some of the reviews but this DC to DC charge controller works amazingly well. I got the 25 amp model and it provides 24.9 to 25 A without any issue. It charges the lithium iron phosphate battery, far quicker than just having a direct connection with a relay to my start battery, the relay would engage when the alternator started putting out power but I noticed I was only charging in about 17 A MAX because the voltage was not quite high enough as the vehicle battery was a lead acid battery and that charged around 13.8V…but the lithium ion battery would like to see 14.6 so this actually has a boost converter in it that will raise the voltage from the 13.8 available in the car to about 14.8 V to charge the lithium, iron phosphate battery, it appears to have a smart regulating technology in it , so it does not give too much voltage to the battery but enough for it to charge quickly. Overall, it’s very well-built, easy to use. Has a nice heat sink that does not require the use of a fan to keep it cool, this is a nice feature, so I don’t have to listen to any noisy fans as it was very quiet and it appears to , keep my lithium battery very happy

### ⭐⭐⭐⭐ Effective product
*by J***D on December 29, 2025*

Great product, reliable

### ⭐⭐⭐ No Anderson connectors included.
*by P***T on May 2, 2024*

Most of the competition includes the Anderson connectors for your wires you are connecting to the dc to dc charger. I was not able to source them local so had to oder them and it delayed my install

## Frequently Bought Together

- ATEM POWER 40A DC to DC Battery Charger with Anderson Plug Reverse Charge Solar Input MPPT for AGM, Gel, Calcium, Lead Acid, LiFePO4 Batteries of 4WDs, RVs, Campers, Trailers On-Board Charger
- Renogy 1000W Pure Sine Wave Inverter 12V DC to 120V AC Converter for Home, RV, Truck, Off-Grid Solar Power 110V with Built-in 5V/2.1A USB Port, Hardwire Remote Controller

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-21*