---
product_id: 766108624
title: "40A Solar + Alternator Charger for RV - MPPT DC to DC Lithium/Gel Battery Charger with Dead Battery Revival, 670W Input, Bluetooth Control"
brand: "renogy rego"
price: "99085 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/766108624-40a-solar-alternator-charger-for-rv-mppt-dc-to-dc
store_origin: IS
region: Iceland
---

# 40A dual-source charging power 670W solar input max Bluetooth app control 40A Solar + Alternator Charger for RV - MPPT DC to DC Lithium/Gel Battery Charger with Dead Battery Revival, 670W Input, Bluetooth Control

**Brand:** renogy rego
**Price:** 99085 kr
**Availability:** ✅ In Stock

## Summary

> 🔋 Power Up Your Adventure — Never Get Stranded Again!

## Quick Answers

- **What is this?** 40A Solar + Alternator Charger for RV - MPPT DC to DC Lithium/Gel Battery Charger with Dead Battery Revival, 670W Input, Bluetooth Control by renogy rego
- **How much does it cost?** 99085 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/766108624-40a-solar-alternator-charger-for-rv-mppt-dc-to-dc)

## 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

- • **Solar-First Efficiency:** Cut fuel costs by 25% with smart solar prioritization while parked or driving.
- • **Seamless Smart Monitoring:** Control and diagnose via Bluetooth app with intuitive LED fault alerts.
- • **Revive Dead Batteries Instantly:** Never pay $200+ for replacements again with automatic deep battery revival.
- • **Rugged & Reliable in Any Climate:** Marine-grade waterproof and heat-resistant from -4°F to 140°F for all adventures.
- • **Industry-Leading 93% Charging Efficiency:** MPPT tech delivers 33% more power and charges 40% faster than 30A models.

## Overview

This 40A MPPT DC to DC charger intelligently revives dead LiFePO4 and Gel batteries, supports up to 670W solar input, and charges with 93% efficiency. Designed for RVs and boats, it seamlessly switches between alternator and solar power, reduces fuel costs by 25%, and offers Bluetooth app monitoring for effortless control. Built tough for extreme environments, it installs quickly and keeps your off-grid lifestyle powered and worry-free.

## Description

40A Solar + Alternator Charger for RV - MPPT DC to DC Lithium/Gel Battery Charger with Dead Battery Revival, 670W Input, Bluetooth Control

## Features

- 🚐 Never Replace a "Dead" Battery Again: Automatically reactivates deeply drained LiFePO4 batteries (even at 0V!) – saving you $200+/battery. Charges while driving (alternator) AND parked (solar), delivering 40A power for RVs/boats. Solar-first logic cuts fuel costs by 25%
- ⚡ 93% Efficient Charging - 33% Faster: Industry-leading efficiency converts 93% of solar/alternator power into battery charge. MPPT tech squeezes 30% more from panels vs cheap chargers. Charges 40% faster than 30A models – run your fridge/fan all night
- 🌞 670W Solar Input for Off-Grid Freedom: Handles up to 670W solar panels (supports 500W+ systems). Smart switching between solar/engine power – no manual toggling! Max 32V input protection prevents panel damage
- 🛡️ Idiot-Proof Safety for Peace of Mind: Survives marine salt spray and desert heat (-4°F~140°F). Auto-shuts off during short circuits/reverse connections. Temperature compensation protects lead-acid batteries in extreme weather
- 📱 Control from Your Beach Chair: Monitor voltage/errors via App + BT-2 module (iOS/Android). LED indicators glow red for faults – no guesswork! Install in 15 mins with color-coded cables (fits tight truck beds)

## 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
- **Product dimensions:** 5.8D x 23.6W x 13.1H centimeters
- **Specification met:** UL, CE, FCC
- **Input voltage:** 16 Volts
- **Amperage:** 40 Amps

## Images

![40A Solar + Alternator Charger for RV - MPPT DC to DC Lithium/Gel Battery Charger with Dead Battery Revival, 670W Input, Bluetooth Control - 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.is/products/766108624-40a-solar-alternator-charger-for-rv-mppt-dc-to-dc](https://www.desertcart.is/products/766108624-40a-solar-alternator-charger-for-rv-mppt-dc-to-dc)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-08*