--- product_id: 648286415 title: "12V 20A/40A DC to DC Battery Charger, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts" price: "1460 zł" currency: PLN in_stock: true reviews_count: 5 url: https://www.desertcart.pl/products/648286415-12v-20a-40a-dc-to-dc-battery-charger-using-multi store_origin: PL region: Poland --- # 12V 20A/40A DC to DC Battery Charger, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts **Price:** 1460 zł **Availability:** ✅ In Stock ## Quick Answers - **What is this?** 12V 20A/40A DC to DC Battery Charger, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts - **How much does it cost?** 1460 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/648286415-12v-20a-40a-dc-to-dc-battery-charger-using-multi) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Renogy 12V 20A/40A DC to DC Battery Charger, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts : desertcart.ae: Books Review: The first one of these I ordered was a used item on desertcart, I bought with full confidence but I didn't get the chance to install it until after the return window closed, so this review is mostly to let the seller know that the used unit was defective and I got screwed. The button on the front which is supposed to change the battery type did not work, all the lights just blink and the battery type doesn't change. Had to order a replacement brand new unit and it works fine. My bad, but sometimes you just can't install something until after the return window. Review: Charger is solid and works great. However, the Bluetooth unit is extremely cheap and came out of the box inoperable. I spent 3 weeks with Renogy trying to resolve it - sending photos and videos demonstrating that it was broken. They refused to honor the warranty, and I had to purchase a separate Bluetooth device from desertcart. ## Technical Specifications | Specification | Value | |---------------|-------| | Customer reviews | 3.9 3.9 out of 5 stars (43) | ## Product Details - **Brand:** Renogy - **Color:** Grey - **Input Voltage:** 16 Volts - **Output Voltage:** 12 Volts - **Product Dimensions:** 6"D x 9.31"W x 2.36"H ## Images ![12V 20A/40A DC to DC Battery Charger, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts - Image 1](https://m.media-amazon.com/images/I/515q7rAKn-L.jpg) ## Customer Reviews ### ⭐⭐⭐ Review *by R***H on 8 March 2026* The first one of these I ordered was a used item on Amazon, I bought with full confidence but I didn't get the chance to install it until after the return window closed, so this review is mostly to let the seller know that the used unit was defective and I got screwed. The button on the front which is supposed to change the battery type did not work, all the lights just blink and the battery type doesn't change. Had to order a replacement brand new unit and it works fine. My bad, but sometimes you just can't install something until after the return window. ### ⭐⭐ Review *by S***. on 13 February 2026* Charger is solid and works great. However, the Bluetooth unit is extremely cheap and came out of the box inoperable. I spent 3 weeks with Renogy trying to resolve it - sending photos and videos demonstrating that it was broken. They refused to honor the warranty, and I had to purchase a separate Bluetooth device from Amazon. ### ⭐⭐⭐⭐⭐ Review *by D***S on 4 November 2025* Kept my bank1 lead acid and bank 2 lithium ion batteries at peak charge all boating season. You need to know that the terminals have shoulder tunnels that are narrower than most battery cable ends. I had to cut down the width of a couple of cable ends. ## Frequently Bought Together - Renogy 12V 40A DC to DC Battery Charger, Using Multi-Stage Charging in RVs, Commercial Vehicles, Boats, Yachts - Renogy 500A Battery Monitor with Shunt, High and Low Voltage Programmable Alarm, Range 10V-120V up to 500A, 20ft Shielded Cable, Compatible 12V Lithium Sealed, Gel, Flooded Batteries,Black --- ## 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.pl/products/648286415-12v-20a-40a-dc-to-dc-battery-charger-using-multi](https://www.desertcart.pl/products/648286415-12v-20a-40a-dc-to-dc-battery-charger-using-multi) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-23*