---
product_id: 687133039
title: "12V 20A DC to DC Battery Charger with Multi-Stage Charging and Bluetooth Compatibility for Flooded, Gel, AGM, and Lithium Batteries in RVs, Commercial Vehicles, Boats, and Yachts"
brand: "renogy"
price: "HK$2406"
currency: HKD
in_stock: true
reviews_count: 5
category: "Renogy"
url: https://www.desertcart.hk/products/687133039-12v-20a-dc-to-dc-battery-charger-with-multi-stage
store_origin: HK
region: Hong Kong
---

# 20A max charging current Bluetooth remote monitoring Multi-stage charging for all battery types 12V 20A DC to DC Battery Charger with Multi-Stage Charging and Bluetooth Compatibility for Flooded, Gel, AGM, and Lithium Batteries in RVs, Commercial Vehicles, Boats, and Yachts

**Brand:** renogy
**Price:** HK$2406
**Availability:** ✅ In Stock

## Summary

> 🔌 Power up smarter, not harder — stay charged, stay ahead!

## Quick Answers

- **What is this?** 12V 20A DC to DC Battery Charger with Multi-Stage Charging and Bluetooth Compatibility for Flooded, Gel, AGM, and Lithium Batteries in RVs, Commercial Vehicles, Boats, and Yachts by renogy
- **How much does it cost?** HK$2406 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/687133039-12v-20a-dc-to-dc-battery-charger-with-multi-stage)

## 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 & Safe Design:** Wall-mountable with internal short-circuit prevention for hassle-free installation.
- • **Advanced Multi-Protection:** Built-in safeguards against overload, short circuit, over-temp, and over-voltage.
- • **Smart Alternator Detection:** Charges only when your engine runs, protecting your battery from drain.
- • **LiFePO4 One-Touch Activation:** Easily optimize lithium battery performance with a simple toggle.
- • **Bluetooth Control & Data Tracking:** Monitor and adjust settings remotely with up to 365 days of charging history.

## Overview

The Renogy 12V 20A DC to DC Battery Charger delivers up to 94% charging efficiency with multi-stage charging tailored for Flooded, Gel, AGM, and Lithium batteries. Featuring smart alternator detection, advanced safety protections, and Bluetooth compatibility for remote monitoring, it’s engineered for RVs, boats, and commercial vehicles to ensure reliable, optimized battery charging on the go.

## Description

Introducing Renogy 12V 20A DC to DC Battery Charger, the second generation of the DCC series. This innovation offers the ultimate driving charging experience with smart control. Compatible with smart and traditional generators, this 12V onboard battery charger ensures efficient energy utilization while safeguarding vehicle batteries. With multiple electronic protections, the product offers a reliable driving charging experience, achieving up to 94% charging efficiency. Integrated with intelligent charging logic, it seamlessly optimizes charging processes. Furthermore, with the remote monitoring feature via the app, you can easily keep track of the generator system's status. Elevate your driving charging experience with Renogy, whether you're exploring the great outdoors or living the van life, it is your dependable companion.

Review: Updated review - I made a mistake. I have a parasitic load on my system but it's not this DC DC charger. I pulled the charger out of the system and still had the same discharging of my batteries I was attributing to this charger. Adding the charger back into the system and no detectable difference to this discharge rate. This charger works great and it's easy to set up and modify the charging parameters through the app; which I really appreciate. Easy to set it up so it keeps my LiFePO4 house batteries at ~80% while my boat sits during the week. ---- old review ---- Charger works as advertised but there is a much larger than anticipated parasitic load when not charging. I estimate it to be about 1 amp. Drained a 100Ah AGM dual purpose battery from 12.7 to 12.0V in ~48 hours. Anyone else experiencing this? Is there a fix (softwear or otherwise)? This charger isn't useful for marine applications where there are often days to weeks between motor use with this magnitude parasitic load.
Review: Read some bad reviews on this but have ran Renogy DC/DC for years (get new ones when I upgrade or change vehicles) and never had one problem.

## Features

- 𝐒𝐚𝐟𝐞𝐠𝐮𝐚𝐫𝐝 𝐒𝐭𝐚𝐫𝐭𝐞𝐫 & 𝐂𝐡𝐚𝐫𝐠𝐞 𝐒𝐦𝐚𝐫𝐭- Renogy 12v battery charger features built-in alternator detection (charges only when engine runs!) and intelligent strategies. Even at vehicle startup, it instantly adjusts modes, protecting your car battery or marine battery. Perfect charger for RVs, boats, and vehicles.
- 𝐒𝐢𝐦𝐩𝐥𝐞 𝐒𝐞𝐭𝐮𝐩, 𝐒𝐚𝐟𝐞 𝐃𝐞𝐬𝐢𝐠𝐧- 𝐓𝐡𝐞 𝟐𝐧𝐝 𝐠𝐞𝐧 Renogy DC to DC charger boasts a compact, wall-mount design for easy installation. Its unique internal layout ensures safe distance between input/output terminals, effectively preventing short circuits in your RV, boat, or marine application.
- 𝐒𝐦𝐚𝐫𝐭 𝐋𝐢𝐅𝐞𝐏𝐎𝟒 𝐀𝐜𝐭𝐢𝐯𝐚𝐭𝐢𝐨𝐧 & 𝐂𝐨𝐧𝐭𝐫𝐨𝐥- Optimize your lifepo4 battery charger experience! Features intelligent LiFePO4 battery activation for peak performance. Easily enable or disable this function with a simple 𝐨𝐧𝐞-𝐭𝐨𝐮𝐜𝐡 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧 (On/Off), giving you full control over your battery's status.
- 𝐂𝐨𝐦𝐩𝐫𝐞𝐡𝐞𝐧𝐬𝐢𝐯𝐞 𝐏𝐫𝐨𝐭𝐞𝐜𝐭𝐢𝐨𝐧 &𝐑𝐞𝐥𝐢𝐚𝐛𝐥𝐞 𝐂𝐡𝐚𝐫𝐠𝐢𝐧𝐠- Engineered for safety, this Renogy DC to DC charger features advanced electronic protection 𝐚𝐠𝐚𝐢𝐧𝐬𝐭 𝐨𝐯𝐞𝐫𝐥𝐨𝐚𝐝, 𝐬𝐡𝐨𝐫𝐭 𝐜𝐢𝐫𝐜𝐮𝐢𝐭, 𝐨𝐯𝐞𝐫-𝐭𝐞𝐦𝐩𝐞𝐫𝐚𝐭𝐮𝐫𝐞, 𝐚𝐧𝐝 𝐨𝐯𝐞𝐫-𝐯𝐨𝐥𝐭𝐚𝐠𝐞. Intelligently manages power output even in high-heat marine or RV environments for safe 12v battery charging.
- 𝐁𝐥𝐮𝐞𝐭𝐨𝐨𝐭𝐡 𝐂𝐨𝐧𝐭𝐫𝐨𝐥 & 𝐌𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠- Requires Renogy BT-2 Module (𝐒𝐨𝐥𝐝 𝐒𝐞𝐩𝐚𝐫𝐚𝐭𝐞𝐥𝐲), Remotely adjust 12 volt battery charger settings via DC Home app or Renogy One Core(𝐒𝐨𝐥𝐝 𝐒𝐞𝐩𝐚𝐫𝐚𝐭𝐞𝐥𝐲). Track performance and review up to 365 days of charging data for your LiFePO4, AGM, Gel, or Flooded battery.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DQP87ZRK |
| Best Sellers Rank | #17,371 in Automotive ( See Top 100 in Automotive ) #100 in Battery Chargers |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,106) |
| Date First Available | December 17, 2024 |
| Item Weight | 3.3 pounds |
| Item model number | RBC20D1U |
| Manufacturer | Renogy |
| Product Dimensions | 2.3 x 9.31 x 5.17 inches |

## Product Details

- **Brand:** Renogy
- **Item weight:** 1.5 kg
- **Output voltage:** 12 Volts (DC)
- **Product dimensions:** 5.8D x 23.6W x 13.1H centimetres
- **Specification met:** UL, CE, FCC, IEC

## Images

![12V 20A DC to DC Battery Charger with Multi-Stage Charging and Bluetooth Compatibility for Flooded, Gel, AGM, and Lithium Batteries in RVs, Commercial Vehicles, Boats, and Yachts - Image 1](https://m.media-amazon.com/images/I/51t1MT7vweL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***I on 3 February 2026*

Updated review - I made a mistake. I have a parasitic load on my system but it's not this DC DC charger. I pulled the charger out of the system and still had the same discharging of my batteries I was attributing to this charger. Adding the charger back into the system and no detectable difference to this discharge rate. This charger works great and it's easy to set up and modify the charging parameters through the app; which I really appreciate. Easy to set it up so it keeps my LiFePO4 house batteries at ~80% while my boat sits during the week. ---- old review ---- Charger works as advertised but there is a much larger than anticipated parasitic load when not charging. I estimate it to be about 1 amp. Drained a 100Ah AGM dual purpose battery from 12.7 to 12.0V in ~48 hours. Anyone else experiencing this? Is there a fix (softwear or otherwise)? This charger isn't useful for marine applications where there are often days to weeks between motor use with this magnitude parasitic load.

### ⭐⭐⭐⭐⭐ Review
*by L***A on 3 February 2026*

Read some bad reviews on this but have ran Renogy DC/DC for years (get new ones when I upgrade or change vehicles) and never had one problem.

### ⭐⭐⭐⭐ Review
*by M***E on 8 August 2025*

Works good, also got the BL2 bluetooth interface (cool that they give you a lower price option in case you don't need BT). The instructions are good (Made in USA), app works good, the until has lots of charge profiles and even current limiting. My only disappointment was that you can only choose from 10A increments for the current limiter. We get 10, 20, 30 and 40 and well I need 25... ohh well

## Frequently Bought Together

- Renogy 12V 20A DC to DC Battery Charger with Multi-Stage Charging and Bluetooth Compatibility for Flooded, Gel, AGM, and Lithium Batteries in RVs, Commercial Vehicles, Boats, and Yachts
- Renogy 40A Set w Holder ANL Fuse, 40 amp (40A ANL Fuse Set w/Fuse)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-18*