---
product_id: 320556035
title: "Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A"
brand: "renogy"
price: "€ 326.73"
currency: EUR
in_stock: true
reviews_count: 2
category: "Renogy"
url: https://www.desertcart.gr/products/320556035-renogy-12v-40a-dc-to-dc-on-board-battery-charger
store_origin: GR
region: Greece
---

# Compatible with AGM, Gel, Flooded & Lithium 20A multi-stage charging Advanced safety protections Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A

**Brand:** renogy
**Price:** € 326.73
**Availability:** ✅ In Stock

## Summary

> 🔌 Charge smarter, drive farther — never get caught powerless again!

## Quick Answers

- **What is this?** Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A by renogy
- **How much does it cost?** € 326.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/320556035-renogy-12v-40a-dc-to-dc-on-board-battery-charger)

## 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-In Safety Shield:** Over-voltage, over-temperature, and reverse polarity protections safeguard your vehicle’s electrical system.
- • **Compact & Rugged Design:** Fits perfectly in tight spaces and withstands harsh conditions—ideal for RVs, boats, and commercial vehicles.
- • **Power-Packed 20A Output:** Fast, efficient charging that keeps your auxiliary batteries ready in just 2.5 hours.
- • **Smart Multi-Stage Charging:** Bulk, Boost, and Float stages optimize battery health and ensure 100% charge every time.
- • **Universal Battery Compatibility:** Seamlessly charges Flooded, Gel, AGM, and Lithium batteries—one charger for all your power needs.

## Overview

The Renogy 12V 20A DC to DC On-Board Battery Charger delivers smart, multi-stage charging compatible with Flooded, Gel, AGM, and Lithium batteries. Designed for RVs, boats, and commercial vehicles, it features advanced safety protections and a compact, durable build. With a rapid 20A output and intelligent battery management, it ensures your auxiliary batteries stay fully charged and your starter battery protected, making it the ultimate power solution for on-the-go professionals.

## Description

Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A : desertcart.ae: Automotive

Review: Excelente Cargador 40 amperes 9 meses trabajando compre el segundo para cargar a 80amperes - Producto de buena Calidad es de gran apoyo ya que aparte de cargar tu batería externa si estas usando en ese momento el inversor suministra los 40 amperes adicionales al inversor por lo que no salen de la bateria dicha corriente por lo que mantiene tu batería cargada más tiempo a diferencia si estuviera apagado dicho cargador. 30/Octubre/2024 Instale el segundo Cargador 40 Amperes funcionando al 100% estoy muy satisfecho con la compra. Con los dos cargadores tengo las opciones de realizar cargas de 20/40/60/80 amperes a las baterías de litio. 08/Abril/2025 solamente hice algunas modificaciones modifique el disyuntor de salida a 100 amperes hacia las baterías de litio y modifique el cable de las baterías del camion a los inversores de 4awg a 2awg para tener menos perdidas de corriente y calentamiento note una mejoría están suministrando 100amperes de consumo por los 2 inversores de momento están funcionando al 100%. En pocas palabras entran 100amperes a los inversores y sacan 78 amperes a las baterias de litio.
Review: Mala experiencia - no funcionó y lo peor q aunque sale q la devolución es gratis a la oficina de correos me cobraron724,24 pesos

## Features

- 【Compatible Multiple Battery Types】 Compatible with a multitude of alternator types, the Renogy 12V DC to DC charger offers correct charging for AGM, Flooded, Gel, and Lithium batteries.
- 【Smart Multi-Stage Charging】 The 40A DC to DC smart charger will charge your house batteries from the starter battery by 3-stage charging (Bulk, Boost, and Float), to make sure it optimally and automatically charges to 100%.
- 【Various Protections For Ultra Safety】 The Renogy on-board battery charger with high-quality offers Over-voltage Protection, Over-temperature Protection, and Reverse Polarity Protection to ensure the operation safety. It also isolates the input and output to prevent voltage transmission errors and interfere with house battery charging.
- 【Protect Your Starter Battery】The DC-DC battery charger is capable of identifying whether the generator is started, to prevent over-discharge of the starting battery and protect the generator.
- 【Reliable Quality & Easy Installation】The compact and robust design of the dc to dc charger makes it suitable for all conditions, and also resolves your concern about the limited room in your vehicle.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Q4SVX3M |
| Amperage | 40 Amps |
| Battery Charge Time | 1.25 hours |
| Best Sellers Rank | #18,000 in Automotive ( See Top 100 in Automotive ) #5,324 in Automobile Accessories |
| Brand | Renogy |
| Built-In Media | charge controller |
| Color | Black |
| Colour | Black |
| Compatible Devices | Vehicles, Boats |
| Connector Type Used on Cable | Battery Terminal Connector |
| Country of Origin | China |
| Current Rating | 40 Amps |
| Customer Reviews | 4.1 out of 5 stars 9 Reviews |
| Global Trade Identification Number | 00810009710233 |
| Input Voltage | 16 Volts |
| Item Dimensions D x W x H | 17.5D x 26.1W x 6.9H centimeters |
| Item Type Name | for Flooded, Gel, AGM, and Lithium Batteries Using Multi-stage Charging |
| Item Weight | 5.3 Pounds |
| Item weight | 5.3 Pounds |
| Manufacturer | Renogy |
| Mfr Part Number | RNG-DCC |
| Model Number | 40A |
| Number of Items | 1 |
| Number of Packs | 1 |
| Output Voltage | 12 Volts (DC) |
| Output voltage | 12 Volts (DC) |
| Product dimensions | 17.5D x 26.1W x 6.9H centimeters |
| Specification Met | CE, RoHS |
| Specification met | CE, RoHS |
| UPC | 810009710233 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Renogy
- **Colour:** Black
- **Item weight:** 2.4 kg
- **Output voltage:** 12 Volts (DC)
- **Product dimensions:** 17.5D x 26.1W x 6.9H centimeters

## Images

![Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A - Image 1](https://m.media-amazon.com/images/I/51vE1UCM0UL.jpg)
![Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A - Image 2](https://m.media-amazon.com/images/I/61r689quBBL.jpg)
![Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A - Image 3](https://m.media-amazon.com/images/I/61vAJyLZ5hL.jpg)
![Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A - Image 4](https://m.media-amazon.com/images/I/61BqiMYvGbL.jpg)
![Renogy 12V 40A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 40A - Image 5](https://m.media-amazon.com/images/I/612ZGiS4NkL.jpg)

## Questions & Answers

**Q: does it support solar?**
A: This one does not support solar. You can get the RBC50D1S-EU or use a separate pwm or mppt solar controller if you wish. Having a separate one will be more robust solution.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excelente Cargador 40 amperes 9 meses trabajando compre el segundo para cargar a 80amperes
*by G***S on 30 January 2024*

Producto de buena Calidad es de gran apoyo ya que aparte de cargar tu batería externa si estas usando en ese momento el inversor suministra los 40 amperes adicionales al inversor por lo que no salen de la bateria dicha corriente por lo que mantiene tu batería cargada más tiempo a diferencia si estuviera apagado dicho cargador. 30/Octubre/2024 Instale el segundo Cargador 40 Amperes funcionando al 100% estoy muy satisfecho con la compra. Con los dos cargadores tengo las opciones de realizar cargas de 20/40/60/80 amperes a las baterías de litio. 08/Abril/2025 solamente hice algunas modificaciones modifique el disyuntor de salida a 100 amperes hacia las baterías de litio y modifique el cable de las baterías del camion a los inversores de 4awg a 2awg para tener menos perdidas de corriente y calentamiento note una mejoría están suministrando 100amperes de consumo por los 2 inversores de momento están funcionando al 100%. En pocas palabras entran 100amperes a los inversores y sacan 78 amperes a las baterias de litio.

### ⭐ Mala experiencia
*by L***E on 11 June 2025*

no funcionó y lo peor q aunque sale q la devolución es gratis a la oficina de correos me cobraron724,24 pesos

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-30*