---
product_id: 654508904
title: "12V 40A DC to DC Battery Charger with Solar Input MPPT, Compatible with LiFePO4, Gel, Flooded, and Sealed Lead Acid Batteries, Two Charging Options for RV, Car, Camping, Marine"
brand: "renogy"
price: "€ 439.00"
currency: EUR
in_stock: true
reviews_count: 5
category: "Renogy"
url: https://www.desertcart.es/products/654508904-12v-40a-dc-to-dc-battery-charger-with-solar-input
store_origin: ES
region: Spain
---

# 40A Power Output Versatile Battery Compatibility Comprehensive Protection 12V 40A DC to DC Battery Charger with Solar Input MPPT, Compatible with LiFePO4, Gel, Flooded, and Sealed Lead Acid Batteries, Two Charging Options for RV, Car, Camping, Marine

**Brand:** renogy
**Price:** € 439.00
**Availability:** ✅ In Stock

## Summary

> 🔌 Charge Ahead with Confidence!

## Quick Answers

- **What is this?** 12V 40A DC to DC Battery Charger with Solar Input MPPT, Compatible with LiFePO4, Gel, Flooded, and Sealed Lead Acid Batteries, Two Charging Options for RV, Car, Camping, Marine by renogy
- **How much does it cost?** € 439.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/654508904-12v-40a-dc-to-dc-battery-charger-with-solar-input)

## Best For

- renogy enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Built-in protections against reverse polarity, over-voltage, under-voltage, and over-temperature for peace of mind.
- • **User-Friendly Design:** One-touch selection and LED indicators make operation a breeze, keeping you informed at all times.
- • **Certified Reliability:** Meets international safety standards with a 2-year warranty for long-term confidence in your investment.
- • **Universal Compatibility:** Seamlessly works with LiFePO4, Gel, Flooded, and Sealed Lead Acid batteries for versatile applications.
- • **Maximize Efficiency on the Go:** Two charging modes adapt to your needs, ensuring optimal battery performance whether you're cruising or parked.

## Overview

The Renogy 12V 40A DC to DC Battery Charger is a versatile and efficient charging solution designed for various battery types, including LiFePO4, Gel, Flooded, and Sealed Lead Acid. With two charging modes, comprehensive protection features, and user-friendly operation, it ensures safe and reliable performance for RVs, cars, camping, and marine applications.

## Description

Introducing the Renogy 12V 40A DC to DC Battery Charger with MPPT, a compact and versatile charger designed to keep you powered on the go. Choose your charging mode based on your specific needs. The charger defaults to DC input priority mode. While driving, it uses the starter battery to charge your system. When parked at campgrounds, it automatically switches to solar charging to utilize free, green solar energy. You can also change the default charging mode to solar priority by simply pressing the SELECT button. The intuitive indicator lights and button provide clear status and battery settings, ensuring easy and efficient power management. With comprehensive safety protections, this charger safeguards both your starter battery and house battery.

Review: The price was right. I have not used it yet. I will update when I finally ue it. I keep getting bothered to review it.
Review: It’s the best decision I ever made, after trying a cheaper dc to dc charger which makes me doubt something wrong with my lifpo4 lithium battery or my alternator but since I installed Renogy dual input everything started working properly. No complicated dip switches, fast charging, no noise fixed behind my driving seat. Cannot wait until I install my solar panels and connected to the device.

## Features

- Two Charging Options-The Renogy 40A DC-DC MPPT battery charger offers two versatile charging modes to maximize efficiency. The charger defaults to DC input priority mode. It will automatically switch to the alternate charging mode when the input voltage in the primary mode falls below the default voltage. This ensures maximum efficiency in charging your battery whether you're on the road or parked.
- Versatile Compatibility-Compatible with various battery types: LiFePO4, Gel, Flooded, and Sealed Lead Acid. It features a 4-stage charging logic that adapts to different battery characteristics for safe and efficient charging.
- Comprehensive Protection-The Renogy 40A DC-DC MPPT charger incorporates comprehensive system protection, offering full safeguarding for solar, generator, and battery connections. It effectively handles reverse polarity, over-voltage, under-voltage, and over-temperature conditions, ensuring reliable and safe operation in all scenarios.
- Easy Operation and Visual Alerts-The Renogy 40A DC-DC features indicator lights and buttons for effortless operation. One-touch selection allows you to choose the correct battery type, while LED lights provide visual alerts for errors, ensuring a hassle-free and efficient charging experience.
- Certified Quality for Long-Term Reliability-This battery charger is certified to multiple safety standards, including FCC, RoHS, CE, and SAA, ensuring it meets international benchmarks. It also comes with a 2-year comprehensive warranty, providing robust assurance for your use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DF2XXML8 |
| Best Sellers Rank | #14,602 in Automotive ( See Top 100 in Automotive ) #91 in Battery Chargers |
| Customer Reviews | 4.2 4.2 out of 5 stars (518) |
| Date First Available | August 23, 2024 |
| Item Weight | 2.81 pounds |
| Item model number | RBC40D1S |
| Manufacturer | Renogy |
| Product Dimensions | 1.89 x 7.68 x 5.87 inches |

## Product Details

- **Brand:** Renogy
- **Colour:** Black
- **Product dimensions:** 4.8D x 19.5W x 14.9H centimeters
- **Item weight:** 1.28 Kilograms
- **Output voltage:** 12 Volts (DC)

## Images

![12V 40A DC to DC Battery Charger with Solar Input MPPT, Compatible with LiFePO4, Gel, Flooded, and Sealed Lead Acid Batteries, Two Charging Options for RV, Car, Camping, Marine - Image 1](https://m.media-amazon.com/images/I/61YHHKvMD2L.jpg)

## Questions & Answers

**Q: What type of alternator is this DC to DC on board battery charger compatible with?**
A: This battery charger is designed to work with both conventional and smart alternators.

**Q: What types of battery does the charger support?**
A: It's suitable for 12V Lithium, Gel, AGM, and Calcium batteries. This charger enables the batteries to reach a full 100% charge. Additionally, it has the capability to revive lithium batteries that have become discharged to a low voltage.

**Q: How do l set the battery since there is no display screen?**
A: To change the battery type, press and hold the SELECT button on the side of the battery charger. The LED lights corresponding to each battery type will illuminate in sequence, indicating the available options.

**Q: If both solar power and the engine are available, can we prioritize using solar power to charge the battery?**
A: Our product defaults to DC charging. To prioritize solar charging, simply press the SELECT button on the side.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by E***. on 26 January 2026*

The price was right. I have not used it yet. I will update when I finally ue it. I keep getting bothered to review it.

### ⭐⭐⭐⭐⭐ Review
*by N***L on 9 December 2025*

It’s the best decision I ever made, after trying a cheaper dc to dc charger which makes me doubt something wrong with my lifpo4 lithium battery or my alternator but since I installed Renogy dual input everything started working properly. No complicated dip switches, fast charging, no noise fixed behind my driving seat. Cannot wait until I install my solar panels and connected to the device.

### ⭐⭐⭐ Review
*by C***. on 3 December 2025*

I have not used it yet, it will probably be another month before I use it so look for an update in like feb to april. The device looks solid it is an aluminum case. The description says BT-2 sold separately but there is no where to connect the BT-2 device. The wiring appears solid, the 8AWG wire is EXTREAMLY fine stranded I would say at least 200 strand. It states 200C but even if you rate it at 105C 8 AWG is good for 76 A, well above the 40A rating. I hope it lasts as the outside and accessible wiring looks very good. So far only CON is the description being misleading causing me to buy a BT-2 for no reason.

## Frequently Bought Together

- Renogy 12V 40A DC to DC Battery Charger with Solar Input MPPT, Compatible with LiFePO4, Gel, Flooded, and Sealed Lead Acid Batteries, Two Charging Options for RV, Car, Camping, Marine
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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-27*