---
product_id: 675606116
title: "40A DC-DC Battery Charger with MPPT Solar and Alternator Dual Power Input, for Flooded, Gel, AGM, and Lithium Battery"
brand: "renogy"
price: "₱25666"
currency: PHP
in_stock: true
reviews_count: 7
category: "Renogy"
url: https://www.desertcart.ph/products/675606116-40a-dc-dc-battery-charger-with-mppt-solar-and-alternator
store_origin: PH
region: Philippines
---

# 40A high-current charging Dual input: solar + alternator Full multi-layer system protection 40A DC-DC Battery Charger with MPPT Solar and Alternator Dual Power Input, for Flooded, Gel, AGM, and Lithium Battery

**Brand:** renogy
**Price:** ₱25666
**Availability:** ✅ In Stock

## Summary

> ⚡ Charge smarter, live freer — power your journey with Renogy’s dual-input dynamo!

## Quick Answers

- **What is this?** 40A DC-DC Battery Charger with MPPT Solar and Alternator Dual Power Input, for Flooded, Gel, AGM, and Lithium Battery by renogy
- **How much does it cost?** ₱25666 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/675606116-40a-dc-dc-battery-charger-with-mppt-solar-and-alternator)

## 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

- • **Safety You Can Trust:** Comprehensive protections guard against reverse polarity, voltage spikes, and overheating—charge with confidence every time.
- • **Power-Packed 40A Output:** Charge faster and smarter with a robust 40-amp current that keeps your batteries ready for any adventure.
- • **Dual Power Input Mastery:** Seamlessly switch between solar and alternator inputs to maximize charging efficiency wherever you are.
- • **Effortless Control & Alerts:** Intuitive LED indicators and one-touch battery selection keep you informed and in command without the hassle.
- • **Battery-Type Smart Adaptation:** 4-stage charging logic tailored for LiFePO4, Gel, Flooded, and AGM batteries ensures optimal health and longevity.

## Overview

The Renogy 40A DC-DC Battery Charger is a versatile, high-efficiency charging solution designed for multiple battery types including LiFePO4, Gel, Flooded, and AGM. Featuring dual power inputs from solar and alternator sources, it automatically optimizes charging modes to ensure maximum battery performance. With advanced 4-stage charging logic, comprehensive safety protections, and user-friendly LED indicators, this compact charger delivers reliable, safe, and intelligent power management for on-the-go professionals and outdoor enthusiasts alike.

## Description

Renogy 40A DC-DC Battery Charger with MPPT Solar and Alternator Dual Power Input, for Flooded, Gel, AGM, and Lithium Battery: desertcart.co.uk: Automotive

Review: Renogy quality - 5 stars because was refunded..
Review: May of had a dud one ? - Seemed fine to start with, charge via car or solar, it gets very hot. I used a fan to keep it at a better temperature. but it just stopped working after nearly 2 months. Was still lit up but no power via car or solar. Tried to contact renogy, never got an answer to call or emails, it was past it returns date on desertcart, so wouldn’t let me send it back. I contacted desertcart but luckily it was on the monthly payment, so they just let me send it back. Got a refund on the payments I had made.

## Features

- 【Two Charging Options】The Renogy 40A DC-DC MPPT battery charger offers two versatile charging modes to maximize efficiency. The 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.
- 【Versatile Compatibility】Compatible with various battery types: LiFePO4, Gel, Flooded, and Sealed Lead Acid. It features a 4-stage charging logic that adapts to different battery characteristics for safe and efficient charging.
- 【Comprehensive Protection】The Renogy 40A DC-DC MPPT charger incorporates comprehensive system protection, offering full safeguarding for solar, generator, and battery connections. It effectively handles reverse polarity, over-voltage, under-voltage, and over-temperature conditions, ensuring reliable and safe operation in all scenarios.
- 【Easy Operation and Visual Alerts】The Renogy 40A DC-DC features indicator lights and buttons for effortless operation. One-touch selection allows you to choose the correct battery type, while LED lights provide visual alerts for errors, ensuring a hassle-free and efficient charging experience.
- 【Certified Quality for Long-Term Reliability】This battery charger is certified to multiple safety standards, including FCC, RoHS, CE, and SAA, ensuring it meets international benchmarks. It also comes with a 2-year comprehensive warranty, providing robust assurance for your use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DHKTF425 |
| Best Sellers Rank | 12,826 in Automotive ( See Top 100 in Automotive ) 105 in Car Battery Charging Units |
| Guaranteed software updates until | unknown |
| Item model number | 40A Battery Charger |
| Manufacturer | Renogy |
| Product Dimensions | 4.8 x 14.8 x 19.5 cm; 1.27 kg |

## Product Details

- **Brand:** Renogy
- **Colour:** Black
- **Item weight:** 1.27 Kilograms
- **Output voltage:** 12 Volts (DC)
- **Product dimensions:** 4.8D x 14.8W x 19.5H centimetres

## Images

![40A DC-DC Battery Charger with MPPT Solar and Alternator Dual Power Input, for Flooded, Gel, AGM, and Lithium Battery - Image 1](https://m.media-amazon.com/images/I/61YHHKvMD2L.jpg)

## Available Options

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

## Questions & Answers

**Q: When installing the DC-DC battery charger, are there any precautions I need to be aware of?**
A: First, installing the charger horizontal will improve venting and heat dissipation of the charger. Additionally, positioning the DC-DC charger nearer the service battery is advised.

**Q: What types of batteries can the charger be used for?**
A: AGM, Gel, Flooded, Lithium-iron Phosphate, User

**Q: How does the charger have communication functionality?**
A: To enable communication, purchase the RENOGY BT-2 Bluetooth module and connect it to the charger's communication port. This will establish communication with mobile terminals like DC Home and Core, granting access to crucial data.

**Q: What stages of charging logic do smart chargers typically include?**
A: Smart chargers typically feature a four-stage charging logic design, encompassing the bulk charge stage, constant voltage stage, float charge stage, and equalization stage. These stages ensure that batteries can be charged safely and efficiently.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Renogy quality
*by S***G on 6 June 2025*

5 stars because was refunded..

### ⭐ May of had a dud one ?
*by W***R on 28 November 2025*

Seemed fine to start with, charge via car or solar, it gets very hot. I used a fan to keep it at a better temperature. but it just stopped working after nearly 2 months. Was still lit up but no power via car or solar. Tried to contact renogy, never got an answer to call or emails, it was past it returns date on Amazon, so wouldn’t let me send it back. I contacted Amazon but luckily it was on the monthly payment, so they just let me send it back. Got a refund on the payments I had made.

### ⭐⭐⭐⭐ And I trusted them but they stabbed me in the back
*by T***Y on 29 April 2025*

Well when looking for the PERFECT. EVERYTHING CHARGER this ticked all the boxes as it.did solar 40a batt batt for.my 300w lithium battrey the one must have was a way to monitor solar and b2b as shore power was never going to happen after meticulous research on the advert it clearly states add renologys bt2 bluetooth dongle via rj connector and the magic will happen well on arrival I paid my auto electrician to fit it got it home and went to plug in the magic box and guess what NO MAGIC HARRY POTTER HAS LEFT THE BUILDING as it has no port to plug in to on repetedly contacting reneolgy to rectify it nope no response so it's not what was described at this point I'm out the instalation cost and hassle and time if I rip it out instead of joy just gutted

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**Shop now:** [https://www.desertcart.ph/products/675606116-40a-dc-dc-battery-charger-with-mppt-solar-and-alternator](https://www.desertcart.ph/products/675606116-40a-dc-dc-battery-charger-with-mppt-solar-and-alternator)

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-03-07*