---
product_id: 641723713
title: "Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts"
brand: "renogy"
price: "€ 386.90"
currency: EUR
in_stock: true
reviews_count: 7
category: "Renogy"
url: https://www.desertcart.fi/products/641723713-renogy-dc-to-dc-battery-charger-12v-40a-intelligent-converter
store_origin: FI
region: Finland
---

# 40A max charging current Bluetooth remote control & 365-day data log Full electronic protection suite Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts

**Brand:** renogy
**Price:** € 386.90
**Availability:** ✅ In Stock

## Summary

> 🔋 Charge smarter, drive further — power your adventures with confidence!

## Quick Answers

- **What is this?** Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts by renogy
- **How much does it cost?** € 386.90 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/641723713-renogy-dc-to-dc-battery-charger-12v-40a-intelligent-converter)

## 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

- • **Advanced Safety Protections:** Built-in overload, short circuit, over-temperature, and over-voltage defenses ensure reliable, safe operation.
- • **Bluetooth-Enabled Monitoring:** Control and track charging parameters remotely via app, with a full year of performance data at your fingertips.
- • **Compact & User-Friendly Design:** Wall-mounted, space-saving layout with safe terminal spacing for easy, worry-free installation.
- • **Smart Starter Battery Safeguard:** Protects your vehicle battery by charging only when the engine runs, preventing startup damage.
- • **Custom Lithium Battery Activation:** One-touch Li battery activation/deactivation for tailored battery management and peak performance.

## Overview

The Renogy 12V 40A DC to DC Battery Charger is an intelligent, compact converter designed for diverse battery types including Flooded, Gel, AGM, and Lithium. Ideal for RVs, trucks, motorhomes, commercial vehicles, boats, and yachts, it features smart alternator detection to protect starter batteries, Bluetooth-enabled remote control with 365-day data logging, and comprehensive electronic protections. Its user-friendly design and customizable lithium battery activation make it a reliable choice for on-the-go power management.

## Description

Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts: desertcart.co.uk: Automotive

Review: Best value - Best value for money
Review: A little disappointed - I so wanted to give this 5 stars, because i like the compact slim size, it does not get red hot like the victron dc/dc chargers, but this 40a charger does not charge at 40a, and it is not a constant flow of amps, it fluctuates on and off, from start up it may go up to about 35 or 36a, then within 20 seconds it goes down to zero, then after about 20 seconds it slowly goes back up to about 33a where it stays for about 30 seconds then drops back down to zero for about 20 seconds then starts going back up again, i don't know if this is how it supposed to work but its not very good in my opinion as its taking longer to get the leisure batteries charged while on the road... the victron used to charge at a constant rate, most the time at a rate higher than what the charger was rated at, as long as the engine was running it charged, it only dropped off when the batteries were nearly full at about 96 to 98% SOC, unfortunately after about 4 yrs it started to play up so this was its replacement. On the + side i have to say Renogy customer service is way better than what it used to be, where do you get help from for victron - youtube This is an update, it now charges at 40.5amps but at present it still not a constant charge, it was pretty unfair of me to slate this product so early, Renogy are back and fourth with me at present trying to find out what the problem is..if its the charger or if its something in my van that's causing the issue

## Features

- 【Safeguard the Starter Battery】This onboard 12V DCC Charger not only features built-in alternator running detection to ensure charging only occurs when the engine is running, protecting the vehicle battery, but also boasts intelligent charging strategies. Even during the instant of vehicle startup, it swiftly adjusts the charging mode, guaranteeing no harm to the starter battery.
- 【Simple and Compact Layout】The second generation DCC charger adopts a wall-mounted design, simple yet efficient, facilitating easy installation for solar beginners. Its unique internal layout ensures a safe distance between the input and output power terminals, effectively avoiding the risk of positive and negative pole short circuits.
- 【Intelligent Bluetooth Control】With the advanced BT-2 Bluetooth module, this DCC charger enables remote control of charging parameters via the DC Home app and Renogy One Core. Additionally, it records up to 365 days of data for comprehensive ecosystem monitoring.
- 【Complete electronic protection】Renogy 12V DC to DC Battery Charger adopts advanced protection technology, ensuring comprehensive safety for your vehicle. It effectively prevents overload, short circuits, and handles challenges like over-temperature and over-voltage effortlessly. Even in high-temperature environments, it intelligently adjusts output power, ensuring efficient and safe charging.
- 【Li Battery Activation On/Off】Renogy DCC battery charger features intelligent Li battery activation, ensuring optimal battery performance. Meanwhile, considering users' personalized needs, a simple one-touch operation allows easy activation and deactivation of this feature, giving you complete control over the battery's status.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D94914J1 |
| Best Sellers Rank | 14,202 in Automotive ( See Top 100 in Automotive ) 110 in Car Battery Charging Units |
| Brand | Renogy |
| Brand Name | Renogy |
| Colour | Grey |
| Country of Origin | China |
| Current Rating | 40 Amps |
| Customer Reviews | 3.8 out of 5 stars 22 Reviews |
| Input Voltage | 12 Volts (DC) |
| Input voltage | 12 Volts (DC) |
| Item Dimensions D x W x H | 24D x 15W x 6H centimetres |
| Manufacturer | Renogy |
| Manufacturer Part Number | RBC40D1U-UK |
| Model Number | RBC40D1U-UK |
| Output Voltage | 12 Volts (DC) |
| Output voltage | 12 Volts (DC) |
| Product Warranty | 2 Year Warranty |
| Product dimensions | 24D x 15W x 6H centimetres |
| Specification Met | CE |
| Specification met | CE |
| UPC | 840315221772 |

## Product Details

- **Brand:** Renogy
- **Colour:** Grey
- **Output voltage:** 12 Volts (DC)
- **Product dimensions:** 24D x 15W x 6H centimetres
- **Specification met:** CE

## Images

![Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts - Image 1](https://m.media-amazon.com/images/I/515q7rAKn-L.jpg)
![Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts - Image 2](https://m.media-amazon.com/images/I/71PrcW5N5bL.jpg)
![Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts - Image 3](https://m.media-amazon.com/images/I/71M+FR2LvRL.jpg)
![Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts - Image 4](https://m.media-amazon.com/images/I/61LG79C6R8L.jpg)
![Renogy DC to DC Battery Charger 12V 40A, Intelligent Converter for Flooded, Gel, AGM, and Lithium Batteries, for RVs, Truck, Motorhome, Commercial Vehicles, Boats and Yachts - Image 5](https://m.media-amazon.com/images/I/71zM1Et9OeL.jpg)

## Available Options

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

## Questions & Answers

**Q: When installing the DC-DC battery charger, are there any precautions I need to be aware of?**
A: First, installing the charger horizontal will improve venting and heat dissipation of the charger. Additionally, positioning the DC-DC charger nearer the service battery is advised.

**Q: What types of batteries can the charger be used for?**
A: AGM, Gel, Flooded, Lithium-iron Phosphate, User

**Q: How does the charger have communication functionality?**
A: To enable communication, purchase the RENOGY BT-2 Bluetooth module and connect it to the charger's communication port. This will establish communication with mobile terminals like DC Home and Core, granting access to crucial data.

**Q: What stages of charging logic do smart chargers typically include?**
A: Smart chargers typically feature a four-stage charging logic design, encompassing the bulk charge stage, constant voltage stage, float charge stage, and equalization stage. These stages ensure that batteries can be charged safely and efficiently.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best value
*by M***H on 13 August 2025*

Best value for money

### ⭐⭐⭐ A little disappointed
*by M***E on 18 March 2025*

I so wanted to give this 5 stars, because i like the compact slim size, it does not get red hot like the victron dc/dc chargers, but this 40a charger does not charge at 40a, and it is not a constant flow of amps, it fluctuates on and off, from start up it may go up to about 35 or 36a, then within 20 seconds it goes down to zero, then after about 20 seconds it slowly goes back up to about 33a where it stays for about 30 seconds then drops back down to zero for about 20 seconds then starts going back up again, i don't know if this is how it supposed to work but its not very good in my opinion as its taking longer to get the leisure batteries charged while on the road... the victron used to charge at a constant rate, most the time at a rate higher than what the charger was rated at, as long as the engine was running it charged, it only dropped off when the batteries were nearly full at about 96 to 98% SOC, unfortunately after about 4 yrs it started to play up so this was its replacement. On the + side i have to say Renogy customer service is way better than what it used to be, where do you get help from for victron - youtube This is an update, it now charges at 40.5amps but at present it still not a constant charge, it was pretty unfair of me to slate this product so early, Renogy are back and fourth with me at present trying to find out what the problem is..if its the charger or if its something in my van that's causing the issue

### ⭐⭐⭐⭐ Dc to dc charger
*by B***L on 22 March 2025*

Lost points on instructions. But dose a really good job of charging the liesure batteries. Can't just connect negative to anywhere. I need to run in another negative. Cable to front of van is picks up a feed from itself and keeps charging, until turned off then starts again as soon as van started. Not great at wire sizing. As information hard to find. I just used 16mm cable a bit of over kill.

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-11*