---
product_id: 323400654
title: "Renogy 12V 20A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 20A"
brand: "renogy"
price: "R4194"
currency: ZAR
in_stock: true
reviews_count: 2
url: https://www.desertcart.co.za/products/323400654-renogy-12v-20a-dc-to-dc-on-board-battery-charger
store_origin: ZA
region: South Africa
---

# Smart Charging 20A Power Safety Features Renogy 12V 20A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 20A

**Brand:** renogy
**Price:** R4194
**Availability:** ✅ In Stock

## Summary

> 🔌 Power Up Your Adventures!

## Quick Answers

- **What is this?** Renogy 12V 20A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 20A by renogy
- **How much does it cost?** R4194 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/323400654-renogy-12v-20a-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

- • **Compact & Robust Design:** Perfect for tight spaces in RVs, boats, and commercial vehicles.
- • **Ultra Safety Protections:** Equipped with Over-voltage, Over-temperature, and Reverse Polarity protections.
- • **Smart Multi-Stage Charging:** Optimizes charging with Bulk, Boost, and Float stages for maximum efficiency.
- • **Starter Battery Protection:** Prevents over-discharge of the starter battery, ensuring reliable performance.
- • **Charge Multiple Battery Types:** Compatible with AGM, Flooded, Gel, and Lithium batteries for versatile use.

## Overview

The Renogy 12V 20A DC to DC On-Board Battery Charger is a versatile and efficient charging solution designed for various battery types, including AGM, Flooded, Gel, and Lithium. With its smart multi-stage charging system, it ensures optimal battery performance while providing essential safety features to protect your investment. Compact and easy to install, this charger is perfect for RVs, boats, and commercial vehicles, making it a must-have for any adventure enthusiast.

## Description

Renogy12V 20A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 20A

## 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 20A 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 |
|---------------|-------|
| Manufacturer | Renogy |
| Brand | Renogy |
| Model | On-Board Battery Charger for Flooded, Gel, AGM, and Lithium |
| Product Dimensions | 21.34 x 17.53 x 6.86 cm; 1.4 kg |
| Item model number | 12V 20A DC to DC |
| Exterior | Painted |
| Manufacturer Part Number | REN-DCC1212-20 |
| Amperage | 20 Amps |
| Voltage | 12 Volts |
| Wattage | 250 watts |
| Item Weight | 1.4 Kilograms |

## Product Details

- **Brand:** Renogy
- **Colour:** Black/Blue
- **Product dimensions:** 17.5D x 21.1W x 6.9H centimeters
- **Item weight:** 1.4 Kilograms
- **Output voltage:** 12 Volts (DC)

## Images

![Renogy 12V 20A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 20A - Image 1](https://m.media-amazon.com/images/I/51XQLtpXU9L.jpg)

## Available Options

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

## Questions & Answers

**Q: I have a 130amp alternator. will the 60amp renogy dcdc charger be too large and damage the alternator? how about at idle for up to 1 hour?**
A: I just talked to tech support at Renogy about this. For alternators of less than 160 amps use the 20 amp charger, up to 180 amp alternator use the 40 amp, and for 200 amp alternators and above the 60 amp alternator can be used. My alternator is 220 amps, but I am going to take the safe route and use the 40 amp charger. I doubt that it is a good idea to charge too much at idle.

**Q: What size alternator do you need for this to work**
A: For an alternator of 150A and under a 20A charger is recommended I use the 20A with a150A alternator on a 2015 transit250 it charges 210A/hours batteries in les than 2 days of driving. If you need charging done faster I recommend replacing your alternator to 250A for a 60A charger.

**Q: Where does the D+ wire get mounted to?  I can interpret the instructions in three different ways, so I am curious what you all have done.**
A: D+ is a 12v trigger for your charger other words it lets your charger know that there is 12v present from the main battery so it can start charging. If you have access to your alternator is the 12v+ main wire where D+ needs to go if you don’t have access to the alternator find a spare unused circuit in your fuse box one that is hot only when the engine is running. If none of this makes sense I suggest finding an installer otherwise you can fry your wiring

**Q: At 40A, I'll have to run the engine for 2.5 hours to charge a 100 amp hour battery (from completely drained). Correct?**
A: In principle yes, however, it will probably take twice that long for a "full charge." From the discharged state it will charge at 40 amps but it will reduce the charge rate for best charging and battery life.  You don't want to run from full to empty and back every day.  I have your configuration (100 amp hour battery and 40 amp charger). I drive 40 miles every day and it is enough to charge the battery for my CPAP and other medical devices for the night.

## Customer Reviews

### ⭐⭐⭐⭐ I like the product
*by B***E on 3 May 2024*

Was delivered on time and worked as charm.I liked it.

### ⭐⭐⭐ Low efficiency.
*by M***P on 19 January 2023*

Working as advertised but found out it’s low efficiency - while delivering 57A it takes 89A from alternator. Also there is no low voltage shut down so when car slow and stop on red light and RPM are low voltage drop below 11V and car (radio lights) not functioning correctly while it still sucks all these Amps.

## Frequently Bought Together

- Renogy 12V 20A DC to DC On-Board Battery Charger for Flooded, Gel, AGM, and Lithium, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts, 20A
- GearIT, 8 Gauge Wire, for Automotive Power/Ground, Battery Cable, Car Audio, RV, Amp, CCA Wire, Wire, Automotive Wire, Amp Kit, Battery Cables, Amp Wiring Kit, (25 feet Each- Black/Red)
- TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-08*