--- product_id: 675606116 title: "Renogy 40A DC-DC Battery Charger with MPPT Solar and Alternator Dual Power Input, for Flooded, Gel, AGM, and Lithium Battery" brand: "renogy" price: "1311.60 DT" currency: TND in_stock: true reviews_count: 9 category: "Renogy" url: https://www.desertcart.tn/products/675606116-renogy-40a-dc-dc-battery-charger-with-mppt-solar-alternator store_origin: TN region: Tunisia --- # 40A high-current output 4-stage smart charging logic Full system protection suite Renogy 40A DC-DC Battery Charger with MPPT Solar and Alternator Dual Power Input, for Flooded, Gel, AGM, and Lithium Battery **Brand:** renogy **Price:** 1311.60 DT **Availability:** ✅ In Stock ## Summary > ⚡ Power up smarter, stay charged longer — never miss a beat on your adventure! ## Quick Answers - **What is this?** Renogy 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?** 1311.60 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/675606116-renogy-40a-dc-dc-battery-charger-with-mppt-solar-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 - • **Battery-Type Chameleon:** Adapts charging profiles for LiFePO4, Gel, AGM, and Flooded batteries—safe, efficient, and versatile. - • **Smart 4-Stage Charging:** Bulk, constant voltage, float, and equalization stages ensure peak battery health and longevity. - • **Built-In Safety Fortress:** Comprehensive protections guard against reverse polarity, over/under voltage, and overheating—charge with confidence. - • **Dual Power Input Mastery:** Seamlessly switches between solar and alternator inputs for uninterrupted, optimized charging on the go. - • **Plug & Play Visual Control:** Intuitive LED alerts and one-touch battery selection make operation effortless and error-proof. ## Overview The Renogy 40A DC-DC Battery Charger is a robust, dual-input charger designed for professional-grade battery management. Compatible with multiple battery chemistries, it features advanced MPPT technology and a 4-stage charging algorithm to maximize efficiency and battery lifespan. Certified for safety and reliability, it offers comprehensive system protections and user-friendly controls, making it the ultimate power solution for mobile and off-grid professionals. ## Description Product Description When installing the DC-DC battery charger, are there any precautions I need to be aware of? 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. When installing the DC-DC battery charger, are there any precautions I need to be aware of? 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. What types of batteries can the charger be used for? AGM, Gel, Flooded, Lithium-iron Phosphate, User What types of batteries can the charger be used for? AGM, Gel, Flooded, Lithium-iron Phosphate, User How does the charger have communication functionality? 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. How does the charger have communication functionality? 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. What stages of charging logic do smart chargers typically include? 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. What stages of charging logic do smart chargers typically include? 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. Review: DCDC 40A RENOGY - It is a very good charger, it charges very quickly at 550w real with a 4 meter long cable, it doesn't heat up, you can even hold your hand on it, it's barely warm because I chose 4 awg cable from the main battery, which is very important to choose a thicker cable, thin cable is cheaper but it heats up the cable, risk of melting and the dcdc charger is hotter Review: Good if you have the right set up for it - this is 40amp for it to work right your system has to at least have a 100w alternator or you will just burn out, i have 380w solar 100w alternator charging 2 engine starter batts in parrallel MPPT then charges the lith house bank 2 280w lith in parrallel works great no issue at all i recon the negative stuff here is people having the wrong set up my set up is a sailing yaght. ## 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 | | Amperage | 40 Amps | | Best Sellers Rank | 3,940 in Automotive ( See Top 100 in Automotive ) 36 in Car Battery Charging Units | | Brand | Renogy | | Brand Name | Renogy | | Colour | Black | | Compatible Devices | Vehicles, Solar Panels, Battery-powered Devices | | Connector Types | Cigarette Lighter Socket, Solar Panel Input | | Country of Origin | China | | Current Rating | 40 Amps | | Customer Reviews | 4.1 out of 5 stars 29 Reviews | | Input Voltage | 12 Volts (DC) | | Item Dimensions D x W x H | 4.8D x 14.8W x 19.5H centimetres | | Item Weight | 1.27 Kilograms | | Item weight | 1.27 Kilograms | | Manufacturer | Renogy | | Manufacturer Part Number | 40A Battery Charger | | Model Number | 40A Battery Charger | | Number of Ports | 2 | | Output Voltage | 12 Volts (DC) | | Output voltage | 12 Volts (DC) | | Product Warranty | 2 | | Product dimensions | 4.8D x 14.8W x 19.5H centimetres | | Specification Met | YES | | Specification met | YES | | UPC | 840315228443 | | Unit Count | 1.0 count | ## 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 ![Renogy 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 ### ⭐⭐⭐⭐⭐ DCDC 40A RENOGY *by C***I on 31 May 2026* It is a very good charger, it charges very quickly at 550w real with a 4 meter long cable, it doesn't heat up, you can even hold your hand on it, it's barely warm because I chose 4 awg cable from the main battery, which is very important to choose a thicker cable, thin cable is cheaper but it heats up the cable, risk of melting and the dcdc charger is hotter ### ⭐⭐⭐⭐⭐ Good if you have the right set up for it *by C***G on 27 May 2026* this is 40amp for it to work right your system has to at least have a 100w alternator or you will just burn out, i have 380w solar 100w alternator charging 2 engine starter batts in parrallel MPPT then charges the lith house bank 2 280w lith in parrallel works great no issue at all i recon the negative stuff here is people having the wrong set up my set up is a sailing yaght. ### ⭐ was working *by S***. on 22 February 2025* this charger has failed after two weeks and about three days, I was 3 days into my holiday when I noticed that my voltage had dropped on my lithium 100ah battery, when I checked the dc to dc charger it was not working, not sure when it failed, Now the problem I have is not with the dc to dc charger failing but with the customer service that renogy provide, as other reviews have said it is abismal at best, they want me to do all the testing on the battery I have, the charger, they want video proof of everything and wont accept a return for testing even though I said I would pay for sending and return to me, apparently they dont test them in the UK, so sending back is not happening, the warranty was two years I believe, I have had this since 16 January 2025 and they wont do anythig but keep asking me for more testing and videos of testing.apparently this how the company does warranty claims.You have to prove its not working by testing and videoing everything they ask for.Think twice before buying anything from renogy as if it fails you will get nowhere with customer service or technical for a long time if ever. --- ## 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.tn/products/675606116-renogy-40a-dc-dc-battery-charger-with-mppt-solar-alternator](https://www.desertcart.tn/products/675606116-renogy-40a-dc-dc-battery-charger-with-mppt-solar-alternator) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-28*