---
product_id: 664834117
title: "Renogy DC to DC Charger with MPPT 12V 40A Solar Input - 670W Dual Charging Car Battery Chargers for RV Marine Camping Compatible with LiFePO4 Gel Flooded and Sealed Lead Acid Batteries"
brand: "renogy"
price: "€ 450.32"
currency: EUR
in_stock: true
reviews_count: 13
category: "Renogy"
url: https://www.desertcart.fi/products/664834117-renogy-dc-to-dc-charger-with-mppt-12v-40a-solar
store_origin: FI
region: Finland
---

# 40A max charging current Compatible with LiFePO4, Gel, Flooded & Sealed batteries 670W solar input capacity Renogy DC to DC Charger with MPPT 12V 40A Solar Input - 670W Dual Charging Car Battery Chargers for RV Marine Camping Compatible with LiFePO4 Gel Flooded and Sealed Lead Acid Batteries

**Brand:** renogy
**Price:** € 450.32
**Availability:** ✅ In Stock

## Summary

> 🔌 Power your adventure with smart, seamless charging—never get stranded again!

## Quick Answers

- **What is this?** Renogy DC to DC Charger with MPPT 12V 40A Solar Input - 670W Dual Charging Car Battery Chargers for RV Marine Camping Compatible with LiFePO4 Gel Flooded and Sealed Lead Acid Batteries by renogy
- **How much does it cost?** € 450.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/664834117-renogy-dc-to-dc-charger-with-mppt-12v-40a-solar)

## 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

- • **Built for Extremes:** Operates reliably from desert heat (113°F) to marine cold (-4°F) with full system protection.
- • **Dual Power Mastery:** Seamlessly switch between solar and alternator inputs for uninterrupted battery charging on the go.
- • **Plug & Play Efficiency:** Color-coded cables and LED alerts make installation and monitoring effortless—get powered in 15 minutes.
- • **Smart 4-Stage Charging:** Adaptive bulk, absorption, float, and equalization stages optimize battery health and longevity.
- • **All-Battery Compatibility:** Supports LiFePO4, Gel, Flooded, and Sealed Lead Acid batteries with one-touch battery type selection.

## Overview

The Renogy 40A DC to DC MPPT Charger delivers up to 670W solar input and dual charging modes, ensuring maximum efficiency for RV, marine, and off-grid battery systems. Compatible with multiple battery chemistries, it features adaptive 4-stage charging, comprehensive safety protections, and rugged design certified to FCC, RoHS, CE, and SAA standards. Compact and easy to install, it’s engineered to keep your batteries healthy and charged no matter where your journey takes you.

## Description

Buy Renogy DC to DC Charger with MPPT 12V 40A Solar Input - 670W Dual Charging Car Battery Chargers for RV Marine Camping Compatible with LiFePO4 Gel Flooded and Sealed Lead Acid Batteries: Battery Chargers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great features, good price - I rarely leave reviews and in most cases only when I am really annoyed by a product. But this unit is really great at a very resonable price! Works very well, is compact, and has many great features that only a combined dual (solar and alternator) charger can provide. For example charging my starter battery when the solar battery is full. I think I had a small parasitic drain on the van which caused the battery to be empty after a few weeks of not driving. With the renogy charger that is no longer a problem. And of course the main function to support dual charging is also great. I specifically used the smaller version (30A) to limit stress on the alternator . That is probably the only missing feature I can think of: configure the max draw from the alternator in the app. But with the 30A version that is not really a problem. And I anyway only have 400W of solar, so 30A is fine.
Review: Awesome charger! - I have a cargo trailer that I use for work with a 2000 watt inverter to run power tool chargers & lights in the trailer. I have a 200 watt solar array connected to the solar input as well as the vehicle smart alternator input. The (2) 100 Ah AGM batteries stay charged through this device to where I never have to plug in my trailer to the house to charge my batteries. What I like about this product is if it’s cloudy and I’m using power then the vehicle will charge the batteries as I’m driving from job to job or I can start the truck for a few minutes and get a charge. This device also prevents voltage feeding back to the vehicle from my trailer batteries as it would if it were connected straight to the battery output from the truck. It also prevents overcharging of the batteries, extending the life. Lastly, the ability to change battery types on this device makes it great to use for different battery chemical types. The price is a little high but it does exactly what I need in just one device.

## Features

- 𝐓𝐰𝐨 𝐂𝐡𝐚𝐫𝐠𝐢𝐧𝐠 𝐎𝐩𝐭𝐢𝐨𝐧𝐬- Renogy 40A DC-DC MPPT battery charger offers two versatile charging modes to maximize efficiency. The charger defaults to DC input priority mode. Battery chargers will automatically switch to the alternate charging mode when the input voltage in the primary mode falls below the default voltage. This DC-DC charger ensures 𝐦𝐚𝐱𝐢𝐦𝐮𝐦 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲 in charging your battery whether you're on the road or parked
- 𝐔𝐥𝐭𝐢𝐦𝐚𝐭𝐞 𝐑𝐕 𝐏𝐨𝐰𝐞𝐫 𝐇𝐮𝐛: Renogy 40A DC-DC MPPT Charger + Solar/Alternator Integration,12v Battery Charger compatibility with LiFePO4, Gel, Flooded, and Sealed Lead Acid batteries. Adaptive 𝟒-𝐬𝐭𝐚𝐠𝐞 charging logic (𝐁𝐮𝐥𝐤/𝐀𝐛𝐬𝐨𝐫𝐩𝐭𝐢𝐨𝐧/𝐅𝐥𝐨𝐚𝐭/𝐄𝐪𝐮𝐚𝐥𝐢𝐳𝐚𝐭𝐢𝐨𝐧) dynamically adjusts voltage/current per chemistry. Safely harness solar panels, smart/conventional vehicle alternators, or DC sources with unified control. Engineered for RVs, boats, and off-grid systems demanding seamless multi-source power management
- 𝐂𝐨𝐦𝐩𝐫𝐞𝐡𝐞𝐧𝐬𝐢𝐯𝐞 𝐏𝐫𝐨𝐭𝐞𝐜𝐭𝐢𝐨𝐧: Renogy 40A DC-DC Battery Charger With mppt incorporates comprehensive system protection, offering full safeguarding for solar, generator, and battery connections. 12v 40A Battery Charger 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: Renogy DC battery charger 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 𝐑𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲 & 𝐄𝐱𝐭𝐫𝐞𝐦𝐞-𝐏𝐫𝐨𝐨𝐟 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞: RENOGY 40A DC-DC Charger 12V meets 𝐅𝐂𝐂/𝐑𝐨𝐇𝐒/𝐂𝐄/𝐒𝐀𝐀 safety standards with 𝟐-𝐲𝐞𝐚𝐫 𝐰𝐚𝐫𝐫𝐚𝐧𝐭𝐲. Engineered for desert heat (113°F) to marine cold (-4°F), featuring auto-shutoff for shorts/reverse connections + lead-acid temperature compensation. Includes color-coded cables for 15-minute installs, ensuring durability in truck beds or coastal environments

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DF2XXML8 |
| Best Sellers Rank | #24,723 in Automotive ( See Top 100 in Automotive ) #133 in Battery Chargers |
| Customer Reviews | 4.2 4.2 out of 5 stars (519) |
| 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
- **Color:** Black
- **Item Weight:** 1.28 Kilograms
- **Output Voltage:** 12 Volts (DC)
- **Product Dimensions:** 1.89"D x 7.68"W x 5.87"H

## Images

![Renogy DC to DC Charger with MPPT 12V 40A Solar Input - 670W Dual Charging Car Battery Chargers for RV Marine Camping Compatible with LiFePO4 Gel Flooded and Sealed Lead Acid Batteries - Image 1](https://m.media-amazon.com/images/I/61YHHKvMD2L.jpg)

## Available Options

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

## 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

### ⭐⭐⭐⭐⭐ Great features, good price
*by J***U on December 22, 2025*

I rarely leave reviews and in most cases only when I am really annoyed by a product. But this unit is really great at a very resonable price! Works very well, is compact, and has many great features that only a combined dual (solar and alternator) charger can provide. For example charging my starter battery when the solar battery is full. I think I had a small parasitic drain on the van which caused the battery to be empty after a few weeks of not driving. With the renogy charger that is no longer a problem. And of course the main function to support dual charging is also great. I specifically used the smaller version (30A) to limit stress on the alternator . That is probably the only missing feature I can think of: configure the max draw from the alternator in the app. But with the 30A version that is not really a problem. And I anyway only have 400W of solar, so 30A is fine.

### ⭐⭐⭐⭐⭐ Awesome charger!
*by J***. on September 14, 2024*

I have a cargo trailer that I use for work with a 2000 watt inverter to run power tool chargers & lights in the trailer. I have a 200 watt solar array connected to the solar input as well as the vehicle smart alternator input. The (2) 100 Ah AGM batteries stay charged through this device to where I never have to plug in my trailer to the house to charge my batteries. What I like about this product is if it’s cloudy and I’m using power then the vehicle will charge the batteries as I’m driving from job to job or I can start the truck for a few minutes and get a charge. This device also prevents voltage feeding back to the vehicle from my trailer batteries as it would if it were connected straight to the battery output from the truck. It also prevents overcharging of the batteries, extending the life. Lastly, the ability to change battery types on this device makes it great to use for different battery chemical types. The price is a little high but it does exactly what I need in just one device.

### ⭐⭐⭐⭐⭐ Running strong
*by N***S on September 21, 2025*

I bought this to replace my previous model Renogy (that I accidentally burned up by overpowering it with solar) and its been running strong since June. I like having both the mppt and the alternator charging in one unit especially with the size constraints of my battery box. Pretty easy to install, a lot more fault tolerant than the previous model and I'm happy with it.

## 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
- Renogy 500A Battery Monitor with Shunt, High and Low Voltage Programmable Alarm, Range 10V-120V up to 500A, 20ft Shielded Cable, Compatible 12V Lithium Sealed, Gel, Flooded Batteries,Black
- Renogy 2000W Pure Sine Wave Inverter 12V DC to 120V AC Converter for Home, RV, Truck, Off-Grid Solar Power Inverter 12V to 110V with Built-in 5V/2.1A USB / Hardwire Port, Remote Controller

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---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-08*