--- product_id: 186600064 title: "CTEK D250SE, 20A, 12V Battery Charger For Starter And Service Batteries In RV, Truck And Overlanding Vehicles, Solar Battery Maintainer, 12V Lithium Ion Battery Charger And Smart Alternator Compatible" brand: "ctek" price: "€ 908.07" currency: EUR in_stock: true category: "Ctek" url: https://www.desertcart.hr/products/186600064-ctek-d250se-20a-12v-battery-charger-for-starter-and-service store_origin: HR region: Croatia --- # 20A max charging power MPPT solar optimization Built-in temperature sensor CTEK D250SE, 20A, 12V Battery Charger For Starter And Service Batteries In RV, Truck And Overlanding Vehicles, Solar Battery Maintainer, 12V Lithium Ion Battery Charger And Smart Alternator Compatible **Brand:** ctek **Price:** € 908.07 **Availability:** ✅ In Stock ## Summary > 🔋 Charge smarter, roam farther — power your journey with CTEK D250SE! ## Quick Answers - **What is this?** CTEK D250SE, 20A, 12V Battery Charger For Starter And Service Batteries In RV, Truck And Overlanding Vehicles, Solar Battery Maintainer, 12V Lithium Ion Battery Charger And Smart Alternator Compatible by ctek - **How much does it cost?** € 908.07 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/186600064-ctek-d250se-20a-12v-battery-charger-for-starter-and-service) ## Best For - ctek enthusiasts ## Why This Product - Trusted ctek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Solar Smart:** Advanced MPPT tech maximizes your solar panel’s output—never miss a ray of power. - • **Power Up Anywhere:** Delivers a robust 20A charge to 12V lead-acid & lithium batteries (40–300Ah) for unstoppable adventures. - • **Weatherproof & Safe:** Splash/dustproof design with reverse polarity and short-circuit protection keeps your gear safe on the go. - • **Dual Battery Mastery:** Seamlessly charges both service and starter batteries, prioritizing your vehicle’s readiness. - • **Smart Alternator Friendly:** Works flawlessly with all smart ECU-controlled alternators—no compatibility worries. ## Overview The CTEK D250SE is a fully automatic 20A, 12V battery charger designed for RVs, trucks, and overlanding vehicles. It supports lead-acid and LiFePO4 lithium batteries (40–300Ah), features selectable charge algorithms, MPPT solar optimization, and smart alternator compatibility. With built-in temperature sensing and robust safety protections, it ensures efficient, safe charging in all conditions, maintaining both service and starter batteries seamlessly. ## Description The D250SE is a fully automatic, 5 step charger that supplies up to 20A of power to any 12V lead-acid or lithium* service battery from 40–300Ah. It has selectable charge algorithms for AGM and lithium* batteries and can use power through its dual input from alternator, solar panel and wind power. When the service battery is fully charged, the D250SE will automatically redirect maintenance charge power to the starter battery. The D250SE can maintain a stable output up to 20A to vehicles fitted with smart ECU controlled alternators and also has a temperature sensor for optimised charging, regardless of weather conditions. 12 V: WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO4, *) 12V lithium batteries (LiFePO4, Li-Fe, Li-iron, LFP) ## Features - Battery Support On the Go: The D250SE is a fully automatic, 5 step charger that supplies up to 20A of power to any 12V lead-acid or lithium* service battery from 40–300Ah. It has selectable charge algorithms for AGM and 12V lithium batteries (*12V LiFePO4). - Achieve Nominal Power from Your Solar Output: Solar Panel Regulator with Maximum Power Point Tracking (MPPT) optimizes available power. - Charge Service and Starter Batteries: When the service battery is fully charged, the D250SE will automatically redirect maintenance charge power to the starter battery. - Smart Alternator Compatible: Full functionality with all types of alternators. - Built-In Temperature Sensor: Allows you to achieve maximum charge levels no matter what the temperature. - Safe and Easy to Use: Splash and dustproof, designed to protect vehicle electronics and non-sparking, reverse polarity protected, and short-circuit proof. Clean voltage and current delivery ensures no surges or spikes. - Protects Sensitive Equipment: Unlike less-sophisticated chargers, there is no need to disconnect the battery; the D250SE is specially designed to not damage electronic systems. No overcharge or undercharge ever. - 2-year warranty. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07X4YTP1P | | Amperage | 20 Amps | | Best Sellers Rank | #1,287,471 in Automotive ( See Top 100 in Automotive ) #2,147 in Battery Chargers | | Brand | CTEK | | Built-In Media | D250SE | | Color | Black | | Current Rating | 20 Amps | | Customer Reviews | 4.3 4.3 out of 5 stars (169) | | Global Trade Identification Number | 07340103403159 | | Input Voltage | 12 Volts | | Item Dimensions D x W x H | 4.3"D x 7.6"W x 2.6"H | | Item Type Name | Battery Charger | | Item Weight | 700 Grams | | Manufacturer | CTEK | | Mfr Part Number | 40-315 | | Model Number | 40-315 | | Number of Ports | 2 | | Output Voltage | 14.4 Volts (DC) | | Specification Met | CE | | Unit Count | 1.0 Count | | Warranty Description | 2 year manufacturer | ## Product Details - **Brand:** CTEK - **Color:** Black - **Item Weight:** 700 Grams - **Output Voltage:** 14.4 Volts (DC) - **Product Dimensions:** 4.3"D x 7.6"W x 2.6"H ## Images ![CTEK D250SE, 20A, 12V Battery Charger For Starter And Service Batteries In RV, Truck And Overlanding Vehicles, Solar Battery Maintainer, 12V Lithium Ion Battery Charger And Smart Alternator Compatible - Image 1](https://m.media-amazon.com/images/I/51Xrvg-ulFL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Wake up to no lights in conversion and amber light is on solid what does this mean how can I fix it?** A: Please contact CTEK directly so we can assist you better. **Q: What voltage should i see if i test on the output for a lifepo4 charging profile (black signal wire to the +)? shouldnt it be 14.6?** A: Please see page 12 of the D250SE user Manual for lithium charge program details including voltages. **Q: Can i use the d250se to charge a 24ah lifepo4 battery?** A: Our D250SE is designed for all types of 12V lead-acid batteries (WET, EFB, Ca/Ca, MF, AGM and GEL) and 12V (4cells) Lithium-ion batteries (Li-FePO4, Li-Fe, Li-iron, LFP) between 40-300Ah. **Q: Is the housing weather proof? Can I mount this under the hood or do I need to wire it into the cabin?** A: The D250SE is IP65 rated (splash and dustproof). It is not waterproof and must be protected from the elements. The D250SE should be mounted with in 6 feet of your service batter/battery bank. This charger requires both a starter battery and service battery. ## Frequently Bought Together - CTEK D250SE, 20A, 12V Battery Charger For Starter And Service Batteries In RV, Truck And Overlanding Vehicles, Solar Battery Maintainer, 12V Lithium Ion Battery Charger And Smart Alternator Compatible - CTEK SMARTPASS 120S with Installation Kit --- ## 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.hr/products/186600064-ctek-d250se-20a-12v-battery-charger-for-starter-and-service](https://www.desertcart.hr/products/186600064-ctek-d250se-20a-12v-battery-charger-for-starter-and-service) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-24*