---
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: "$501.73"
currency: USD
in_stock: true
reviews_count: 2
category: "Renogy"
url: https://www.desertcart.us/products/320556035-renogy-12v-40a-dc-to-dc-on-board-battery-charger
store_origin: US
region: United States of America
---

# 40A high-current output Multi-stage charging for battery health 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:** $501.73
**Availability:** ✅ In Stock

## Summary

> ⚡ Charge smarter, travel farther — power your journey with Renogy!

## 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?** $501.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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

- • **Power-Packed 40 Amps:** Delivers rapid, efficient charging to keep your batteries ready for any adventure.
- • **Built-In Safety Shield:** Over-voltage, over-temperature, and reverse polarity protections ensure worry-free operation on the road or sea.
- • **Compact & Rugged Design:** Space-saving and durable, engineered to withstand harsh environments in RVs, boats, and commercial vehicles.
- • **Smart Multi-Stage Charging:** Automatically optimizes Bulk, Boost, and Float phases for 100% battery capacity and longevity.
- • **Universal Battery Compatibility:** Seamlessly charges Flooded, Gel, AGM, and Lithium batteries—one charger for all your power needs.

## Overview

The Renogy 12V 40A DC to DC On-Board Battery Charger is a versatile, high-performance charger designed for RVs, boats, and commercial vehicles. It supports multiple battery types including Flooded, Gel, AGM, and Lithium, using intelligent multi-stage charging to maximize battery life and efficiency. Equipped with comprehensive safety features and a compact, durable design, it ensures reliable, fast charging while protecting your starter battery and electrical system.

## 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: 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: 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 | #25,751 in Automotive ( See Top 100 in Automotive ) #7,882 in Automobile Accessories |
| Brand | Renogy |
| Built-In Media | charge controller |
| Color | Black |
| Connector Type Used on Cable | Battery Terminal Connector |
| Current Rating | 40 Amps |
| Customer Reviews | 4.1 4.1 out of 5 stars (9) |
| 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 | 2.4 kg |
| Manufacturer | Renogy |
| Mfr Part Number | RNG-DCC |
| Model Number | 40A |
| Output Voltage | 12 Volts (DC) |
| 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)

## Available Options

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

## 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

### ⭐⭐⭐⭐⭐ Review
*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.

### ⭐ Review
*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

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-06-22*