---
product_id: 743490620
title: "12V 40A DC to DC Charger with MPPT for Solar & Alternator Input - Smart On-Board Battery Charger for RV, Marine, Car - Charge AGM, Lithium, Gel, Flooded Batteries"
brand: "renogy rego"
price: "165538 Ft"
currency: HUF
in_stock: true
reviews_count: 1
category: "Renogy Rego"
url: https://www.desertcart.hu/products/743490620-12v-40a-dc-to-dc-charger-with-mppt-for-solar
store_origin: HU
region: Hungary
---

# 40A max charging current Dual input: solar + alternator MPPT solar input for max efficiency 12V 40A DC to DC Charger with MPPT for Solar & Alternator Input - Smart On-Board Battery Charger for RV, Marine, Car - Charge AGM, Lithium, Gel, Flooded Batteries

**Brand:** renogy rego
**Price:** 165538 Ft
**Availability:** ✅ In Stock

## Summary

> 🔋 Charge smarter, roam farther — power your journey with Renogy REGO!

## Quick Answers

- **What is this?** 12V 40A DC to DC Charger with MPPT for Solar & Alternator Input - Smart On-Board Battery Charger for RV, Marine, Car - Charge AGM, Lithium, Gel, Flooded Batteries by renogy rego
- **How much does it cost?** 165538 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/743490620-12v-40a-dc-to-dc-charger-with-mppt-for-solar)

## Best For

- renogy rego enthusiasts

## Why This Product

- Trusted renogy rego brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Power-Packed 40A Output:** Charge your batteries faster and smarter with a robust 40-amp current that keeps your RV or marine setup ready for adventure.
- • **Plug-and-Play Simplicity:** Color-coded cables and intuitive LED indicators make installation and monitoring effortless—get powered up in 15 minutes.
- • **Smart Dual-Source Charging:** Seamlessly switch between solar and alternator inputs to maximize charging efficiency wherever you roam.
- • **Built for Extreme Conditions:** Engineered to withstand desert heat and marine salt spray, this charger thrives in the harshest environments.
- • **Adaptive 4-Stage Charging Logic:** Tailored charging profiles for AGM, Lithium, Gel, and Flooded batteries ensure longevity and peak performance.

## Overview

The RENOGY REGO 12V 40A DC to DC Charger with MPPT is a versatile, rugged battery charger designed for RV, marine, and off-grid use. It intelligently switches between solar and alternator inputs to optimize charging efficiency, supports multiple battery chemistries with adaptive 4-stage charging, and offers comprehensive protection against electrical faults. Built to endure extreme temperatures and salt spray, it combines high performance with easy installation and real-time LED diagnostics.

## Description

Buy RENOGY REGO 12V 40A DC to DC Charger with MPPT for Solar & Alternator Input - Smart On-Board Battery Charger for RV, Marine, Car - Charge AGM, Lithium, Gel, Flooded Batteries: Battery Chargers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Check the VOC rating of your panels - Max VOC of 30 so does not work with Renogy Shadowflux 120W panels (33.7 volts VOC) but I like those panels. This probably should only be used with panels that are 25 or less VOC. The DC to DC function may be worth keeping at the sale price but some of the reviews say it doesn't start charging until your battery is below 12.6 volts. If that is true, that would be a deal breaker. I'm looking at a Victron 100/30. I may keep this for the dc to dc charging function or just get something else for the DC DC charging. I like Renogy stuff and have it in my other camp setup, but do your research, everything must be compatible.

## Features

- RENOGY REGO DC-DC Charger 𝐰𝐢𝐭𝐡 𝟐 𝐂𝐡𝐚𝐫𝐠𝐢𝐧𝐠 𝐎𝐩𝐭𝐢𝐨𝐧𝐬- 40A DC-DC MPPT battery charger offers 𝐭𝐰𝐨 𝐯𝐞𝐫𝐬𝐚𝐭𝐢𝐥𝐞 𝐜𝐡𝐚𝐫𝐠𝐢𝐧𝐠 𝐦𝐨𝐝𝐞𝐬 𝐭𝐨 𝐦𝐚𝐱𝐢𝐦𝐢𝐳𝐞 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲. The 12v battery charger defaults to DC input priority mode. It will 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐜𝐚𝐥𝐥𝐲 𝐬𝐰𝐢𝐭𝐜𝐡 to the alternate charging mode when the input voltage in the primary mode falls below the default voltage. This ensures 𝐦𝐚𝐱𝐢𝐦𝐮𝐦 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲 in charging your battery whether you're on the road or parked
- 𝐀𝐥𝐥-𝐢𝐧-𝐎𝐧𝐞 𝐑𝐕 𝐏𝐨𝐰𝐞𝐫 𝐇𝐮𝐛: Solar Charger + Alternator/DC-DC Charger with MPPT Versatile compatibility with LiFePO4, Gel, Flooded, and Sealed Lead Acid batteries. Its adaptive 𝟒-𝐬𝐭𝐚𝐠𝐞 charging logic (𝐁𝐮𝐥𝐤/𝐀𝐛𝐬𝐨𝐫𝐩𝐭𝐢𝐨𝐧/ 𝐅𝐥𝐨𝐚𝐭/ 𝐄𝐪𝐮𝐚𝐥𝐢𝐳𝐚𝐭𝐢𝐨𝐧) tailors voltage/current for each chemistry, ensuring safe, efficient charging from solar panels, vehicle alternators (𝐬𝐦𝐚𝐫𝐭/𝐜𝐨𝐧𝐯𝐞𝐧𝐭𝐢𝐨𝐧𝐚𝐥), or DC sources. Ideal for RVs, boats, and off-grid systems requiring seamless multi-source power management
- 40A DC-DC Charger with MPPT & Solar Charger: This 𝐑𝐄𝐍𝐎𝐆𝐘 multi-battery charger delivers 𝐜𝐨𝐦𝐩𝐫𝐞𝐡𝐞𝐧𝐬𝐢𝐯𝐞 𝐩𝐫𝐨𝐭𝐞𝐜𝐭𝐢𝐨𝐧 for solar, alternator, and battery systems. Safeguarding against reverse polarity, over/under-voltage, and over-temperature, the 12V DC to DC charger ensures reliable operation across all scenarios. Ideal for RVs, marine, and off-grid setups requiring robust solar charging and alternator integration
- 𝐄𝐱𝐭𝐫𝐞𝐦𝐞-𝐏𝐫𝐨𝐨𝐟 12V DC to DC Charger 40A: Survives desert heat (113°F) and marine salt spray (-4°F~113°F). 𝐑𝐄𝐍𝐎𝐆𝐘 DC to DC charger 12V 40 amp delivers idiot-proof safety, auto-shuts off during shorts/reverse connections, while temperature compensation protects lead-acid batteries. Color-coded cables enable 15-minute installs, and LED indicators glow red for faults—perfect for tight truck beds or beachside relaxation
- 𝐄𝐚𝐬𝐲-𝐔𝐬𝐞 40A MPPT DC-DC/Solar Charger: RENOGY REGO 12V DC to DC charger with solar integration features 𝐢𝐧𝐭𝐮𝐢𝐭𝐢𝐯𝐞 𝐢𝐧𝐝𝐢𝐜𝐚𝐭𝐨𝐫 𝐥𝐢𝐠𝐡𝐭𝐬 and one-touch battery type selection (𝐋𝐢𝐅𝐞𝐏𝐎𝟒/𝐆𝐞𝐥 /𝐅𝐥𝐨𝐨𝐝𝐞𝐝/ 𝐒𝐋𝐀). LED alerts instantly flag errors like reverse polarity or over-voltage. Streamline your power management with this versatile battery charger – designed for effortless RV, marine, and off-grid operation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0FCFM5RVB |
| Best Sellers Rank | #986,825 in Automotive ( See Top 100 in Automotive ) #1,885 in Battery Chargers |
| Customer Reviews | 2.7 2.7 out of 5 stars (3) |
| Date First Available | July 3, 2025 |
| Item Weight | 2.79 pounds |
| Manufacturer | RENOGY |
| Product Dimensions | 2.3 x 9.31 x 5.17 inches |

## Product Details

- **Brand:** RENOGY REGO
- **Current Rating:** 40 Amps
- **Input Voltage:** 16 Volts
- **Output Voltage:** 12 Volts (DC)
- **Product Dimensions:** 2.3"D x 9.31"W x 5.17"H

## Images

![12V 40A DC to DC Charger with MPPT for Solar & Alternator Input - Smart On-Board Battery Charger for RV, Marine, Car - Charge AGM, Lithium, Gel, Flooded Batteries - Image 1](https://m.media-amazon.com/images/I/61YHHKvMD2L.jpg)

## Questions & Answers

**Q: What type of alternator is this DC to DC on board battery charger compatible with?**
A: Works with both alternators. But smart alternators vary voltage, so you MUST connect the charger's IGN (ACC) cable to the Vehicle Ignition Port for them to work properly.

**Q: What types of battery does the charger support?**
A: It's suitable for 12V Lithium, Gel, AGM, and Calcium batteries. This charger enables the batteries to reach a full 100% charge. Additionally, it has the capability to revive lithium batteries that have become discharged to a low voltage.

**Q: How do l set the battery since there is no display screen?**
A: To change the battery type, press and hold the SELECT button on the side of the battery charger. The LED lights corresponding to each battery type will illuminate in sequence, indicating the available options.

**Q: If both solar power and the engine are available, can we prioritize using solar power to charge the battery?**
A: Our product defaults to DC charging. To prioritize solar charging, simply press the SELECT button on the side.

**Q: Can solar charging and DC charging be switched automatically?**
A: Charging automatically switches to solar when 1. Generator ON: DC <11.3V & Solar >13V 2. Generator OFF: DC <12.7V & Solar >13V

## Customer Reviews

### ⭐⭐⭐ Check the VOC rating of your panels
*by F***K on November 2, 2025*

Max VOC of 30 so does not work with Renogy Shadowflux 120W panels (33.7 volts VOC) but I like those panels. This probably should only be used with panels that are 25 or less VOC. The DC to DC function may be worth keeping at the sale price but some of the reviews say it doesn't start charging until your battery is below 12.6 volts. If that is true, that would be a deal breaker. I'm looking at a Victron 100/30. I may keep this for the dc to dc charging function or just get something else for the DC DC charging. I like Renogy stuff and have it in my other camp setup, but do your research, everything must be compatible.

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-28*