--- product_id: 280604582 title: "Dual Input 40A in-Vehicle DC to DC Battery Charger with MPPT Solar Regulator, Green Power Priority, 12V/24V Compatible, for Lithium, AGM, Gel, Lead Acid, Calcium, LiFePO4 Batteries" brand: "redarc" price: "$2910.12" currency: USD in_stock: true reviews_count: 5 category: "Redarc" url: https://www.desertcart.us/products/280604582-dual-input-40a-in-vehicle-dc-to-dc-battery-charger store_origin: US region: United States of America --- # 40A dual input power MPPT solar efficiency IP67 sealed rugged design Dual Input 40A in-Vehicle DC to DC Battery Charger with MPPT Solar Regulator, Green Power Priority, 12V/24V Compatible, for Lithium, AGM, Gel, Lead Acid, Calcium, LiFePO4 Batteries **Brand:** redarc **Price:** $2910.12 **Availability:** ✅ In Stock ## Summary > 🔋 Power your off-grid lifestyle with unstoppable, smart energy! ## Quick Answers - **What is this?** Dual Input 40A in-Vehicle DC to DC Battery Charger with MPPT Solar Regulator, Green Power Priority, 12V/24V Compatible, for Lithium, AGM, Gel, Lead Acid, Calcium, LiFePO4 Batteries by redarc - **How much does it cost?** $2910.12 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/280604582-dual-input-40a-in-vehicle-dc-to-dc-battery-charger) ## Best For - redarc enthusiasts ## Why This Product - Trusted redarc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Input Power Boost:** Simultaneously charges from alternator & solar for unstoppable energy flow - • **Solar-Optimized Charging:** MPPT tech maximizes solar harvest, prioritizing green power to save your engine - • **Trusted Aussie Engineering:** 45+ years of rugged reliability backed by a 2-year warranty and global support - • **Built for Extreme Adventures:** Waterproof, dustproof, and heat-resistant up to 176°F—ready for any terrain - • **Universal Battery Compatibility:** Smart multi-stage charging for Lithium, AGM, Gel, Lead Acid & more ## Overview The REDARC Dual Input 40A DC to DC Battery Charger is a rugged, in-vehicle power solution designed for 12V/24V systems. It simultaneously charges your auxiliary battery from both your vehicle alternator and solar panels using advanced MPPT solar regulation and green power priority. Compatible with a wide range of battery types, it features multi-stage charging for optimal battery health and is engineered to withstand extreme environmental conditions. Trusted for over 45 years and backed by a 2-year warranty, this charger is ideal for off-grid adventurers, RV owners, and professionals needing reliable, efficient power on the move. ## Description Take control of your power with the REDARC Dual Input 40A In-Vehicle DC Battery Charger, the ultimate off-grid charging solution for vehicles running 12V or 24V systems. This advanced DC-DC charger delivers a full, reliable charge to your auxiliary or house batteries while you’re on the move, ensuring your electronics, fridges, lights, and accessories do not run out of power. Built with dual charging capability, this charger draws power from both your car alternator and solar panels simultaneously. The integrated MPPT solar regulator extracts maximum efficiency from solar input, while Green Power Priority gives solar energy precedence, reducing strain on your vehicle’s electrical system. Perfect for adventurers, RV owners, camper van travelers, and worksite fleets, this solar-ready 12V charger supports lithium, AGM, GEL, standard lead acid, and calcium batteries. Its multi-stage charging algorithm ensures optimal performance and battery longevity across every application. Designed to thrive in extreme environments, the charger features fully sealed, potted electronics that resist water, dust, and temperatures up to 176 F. Whether you’re crossing deserts, camping off-grid, or managing power for critical equipment, REDARC’s 40A DC-DC charger delivers dependable, efficient energy wherever the road takes you. REDARC is more than in-vehicle battery chargers. We build a complete ecosystem of off-grid power charging solutions, including car power inverters, battery chargers, battery management systems, solar panels, vehicle trailer brake controller solutions, and auto accessories—all trusted by adventurers worldwide. Power your journey with The Power of REDARC: Confidence for The Long Haul. Review: This unit is built like a tank! Easy to install, just make sure you follow the instructions to the letter. I initially hooked up the grounds to both of my batteries and this does not work. Must be vehicle or frame grounded. Also do not cheap out on resettable 60 amp breakers. They overheat and trip. I then bought the recommended 60 amp blade fuse breakers from Redarc and the whole setup works amazingly! Full 50 amp charge going to my RV battery bank. Service was also off the charts as I had questions about my initial set up. Absolutely worth the money over the other DC to DC chargers available. Review: Great product ## Features - Dual Input Charger for On-the-Go Power: This in-vehicle DC battery charger keeps your secondary battery fully charged while driving. Dual inputs let you charge from your vehicle alternator and solar panels at once for reliable off-grid energy - Solar Ready with MPPT Efficiency: Harness clean energy wherever you travel. Built-in Maximum Power Point Tracking (MPPT) optimizes solar output and Green Power Priority selects solar first, reducing alternator load and maximizing charging efficiency - Multi-Stage Charging for Any Battery: Portable and compatible with AGM, GEL, standard lead acid, calcium, and LiFePO4 lithium batteries. The intelligent charging profile delivers efficient power for battery banks 200AH and up in most common setups - Built Tough: Engineered for overlanding, RVing, and off-road use. The dual input battery charger withstands deep water crossings, extreme heat up to 176 F, dust, and vibration. Fully sealed electronics deliver reliability in every environment - Confidence for The Long Haul: Designed and tested in the Australian Outback, REDARC automotive products are trusted for over 45 years. This unit is backed by a 2-year limited warranty and global support network ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B077JR6NH5 | | Amperage | 40 Amps | | Best Sellers Rank | #590,020 in Automotive ( See Top 100 in Automotive ) #1,286 in Battery Chargers | | Brand | REDARC | | Color | Black | | Current Rating | 40 Amps | | Customer Reviews | 4.1 out of 5 stars 42 Reviews | | Global Trade Identification Number | 09338628004355 | | Input Voltage | 12 Volts | | Item Weight | 35.3 Ounces | | Manufacturer | REDARC | | Mfr Part Number | BCDC1240D | | Model Number | BCDC1240D | | Output Voltage | 12 Volts (DC) | | Unit Count | 1.0 Count | ## Product Details - **Brand:** REDARC - **Colour:** Black - **Item weight:** 35.3 Ounces - **Output voltage:** 24 Volts - **Specification met:** SEMA ## Images ![Dual Input 40A in-Vehicle DC to DC Battery Charger with MPPT Solar Regulator, Green Power Priority, 12V/24V Compatible, for Lithium, AGM, Gel, Lead Acid, Calcium, LiFePO4 Batteries - Image 1](https://m.media-amazon.com/images/I/71prs+YGDmL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Does this have Bluetooth connectivity?** A: nope. You'd most likely want that functionality from a separate battery monitor anyway, though. As far as I understand, most chargers will only know when to float your battery. They won't know what percentage your battery is at between dead and full, or the calculated time to full discharge based on usage, or a handful of other useful stats/info. **Q: What is the maximum volts for the solar input?** A: Hi there, Thanks for your message and apologies for the late reply. The maximum open circuit voltage (VOC) that our chargers can accept is 32V. You are needing to use '12V nominal' type solar panels with our BCDC units. Best regards, REDARC **Q: On the lifepo4 set up,the redarc chart does not specify if that set up is for 1 or 2 lifepo4 batteries, does it mean is the same size wire regardless?** A: Hi there, Thanks for your question. Technically the BCDC can be used on either one, two or three batteries - we normally ensure that the amount of AH the unit is trying to charge isn't too large for it (eg around 200AH maximum). So yes the wire size chart is still applicable no matter how batteries you wire on the output side of the charger, just go by the length of the cable runs instead. We hope that's helpful! Best regards, REDARC **Q: Is this unit water tight? can it be mounted unter the travel trailer?** A: its water proof but you need to mount it: 1-As close as possible to the battery being charged (auxiliary battery) 2-Away from any direct engine heat. 3-For Caravan or camper, near or in the battery compartment is generally the best position. 4-Mount the BCDC to a metal surface if possible to ensure heat dissipation. So I guess the answer is no ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by L***L on 15 October 2021* This unit is built like a tank! Easy to install, just make sure you follow the instructions to the letter. I initially hooked up the grounds to both of my batteries and this does not work. Must be vehicle or frame grounded. Also do not cheap out on resettable 60 amp breakers. They overheat and trip. I then bought the recommended 60 amp blade fuse breakers from Redarc and the whole setup works amazingly! Full 50 amp charge going to my RV battery bank. Service was also off the charts as I had questions about my initial set up. Absolutely worth the money over the other DC to DC chargers available. ### ⭐⭐⭐⭐⭐ Review *by C***� on 24 May 2024* Great product ### ⭐⭐⭐⭐⭐ Review *by D***S on 17 July 2024* That name alone should make the buying decision. Not the cheapest, but the quality is unmatched. Would buy it again in a heartbeat if needed. ## Frequently Bought Together - REDARC 40A in-Vehicle DC to DC Charger with MPPT — Dual Input for Solar & Alternator Charging, Green Power Priority - 12 or 24V Battery Charger Suitable with AGM, Gel, Lithium LiFePO4 Batteries - 60A Fuse Kit - Blue Sea Systems 5026 ST Blade Fuse Block 12 Circuit with Ground and Cover --- ## 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.us/products/280604582-dual-input-40a-in-vehicle-dc-to-dc-battery-charger](https://www.desertcart.us/products/280604582-dual-input-40a-in-vehicle-dc-to-dc-battery-charger) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-10*