https://campervanvanmotorhome.com Sat, 10 Oct 2026 15:55:07 +0000 en-US hourly 1 https://wordpress.org/?v=4.1.1 https://campervanvanmotorhome.com/2026/09/ctek-d250se-dual-dc-dc-charger-alternator-and-solar-camper-van-motor-home/ https://campervanvanmotorhome.com/2026/09/ctek-d250se-dual-dc-dc-charger-alternator-and-solar-camper-van-motor-home/#comments Mon, 07 Sep 2026 10:19:19 +0000 https://campervanvanmotorhome.com/2026/09/ctek-d250se-dual-dc-dc-charger-alternator-and-solar-camper-van-motor-home/


The D250SE is a fully automatic, five-stage charger capable of delivering up to 20A to 12V lead-acid or lithium service batteries with capacities ranging from 40Ah to 300Ah. It features selectable charging algorithms for flooded, AGM, and lithium batteries, and can draw power from multiple sources, including the vehicle alternator, solar panels, or wind turbines. Engineered to perform reliably with modern, ECU-controlled smart alternators, the D250SE maintains a stable output of up to 20A. An integrated temperature sensor optimises charging performance across varying environmental conditions, ensuring consistent and efficient operation. The D250SE is designed for use with solar panels rated up to 300W. However, it can safely accommodate higher-output panels provided the open-circuit voltage does not exceed 23V. In fact, connecting a higher-capacity panel can help offset reduced solar performance during overcast conditions. Additionally, the D250SE incorporates a battery maintenance function that delivers three-second pulse charges to the starter battery every 15 seconds. Charging current is dynamically adjusted based on available solar input and the starter battery’s voltage, helping to maintain optimal battery health. Ideal for campervan applications-particularly those equipped with smart alternators-the D250SE can operate as a standalone solution or in conjunction with the CTEK Smartpass system. The Smartpass 120S is fully compatible with lithium batteries, providing enhanced flexibility and performance for advanced power management setups. Suitable for use with smart alternators? Input Voltage – Volts. 11.5 / 23. Output voltage – Volts. Max 14.4V (14.7V in AGM mode). Charging current – Amps. Input from alternator – V. 11.5v TO 23v. Input from solar panel – V. 11.5V to 23V. >13.1V, for 5 sec. (engine running, alternator charging). Smart alternator cut-in V. >11.8V, for 5 sec. Smart alternator cut-out V. Suitable for battery types. All 12V lead-acid batteries including: Wet, A. M, gel, calcium and maintenance free + LiFePO4 lithium batteries. Power input from solar panel – Watts. Operating temperature range – °C. Minus 20 degrees C to plus 50 degrees C Automatic reduction of power at high ambient temperature. 30 degrees C 16A, 50 degrees C 13A. IP65 (splash and dust proof). This charger can only be used with solar panels that have a peak voltage maximum of upto 23V. Please ensure that your panel is compatible before purchasing. Temperature compensated charging, Reverse Polarity protection. Fully certified for use in vehicles. Dimensions (L x W x H) – mm. 192 x 110 x 65mm.

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3/5/7MTR Dual DC-DC Charger / Split Charge Kit Euro 5/6 Camper Van Motorhome UK. 3/5/7 meters 12V 20Amp DC to DC Dual Battery Charger Kits With Built-in Solar MPPT Fit for Multiple battery types: AGM, GEL, Flooded, and Lithium, Idea for Caravan Camper Van Motorhome Boat. This powerful, high-quality battery to battery charger can charge a 12V battery from another 12V battery with its own power source, or from a solar panel using its built-in solar input PWM charge controller, at up to 20A. The fully-automatic battery charger uses an intelligent, multi-stage charging program that can be set to a wide variety of battery types using easy, one-button programming and features a full suite of electronic protections. This system is ideal for caravans, campervans, motorhomes or boats, where the alternator charging can be shared between the starter and leisure batteries while the engine is running, then the leisure battery can be kept topped up from solar power while the vehicle is parked. By combining two chargers into one unit the set-up and operation are made simple, allowing you to easily share an existing charging source between two batteries or battery banks and utilise solar power to extend your off-grid runtime. DC-DC Charger Key Features. Charge the leisure battery in two ways. DC Input from the (smart) alternator and the start battery or DC Input from the Solar Panel. Compatible with both conventional and smart alternators. (Euro5/6 Vehicle with variable output voltage). Compatible with Multiple battery types. AGM, GEL, Flooded, and Lithium. Solar panel regulator with Maximum Power Point Tracking. Bulk, Boost, and Float. Automatic battery separator works without the need for diodes or VSR relays. Starter battery maintenance charging when your service battery is fully charged. Battery isolation, over-voltage protection, battery temperature protection, over-current protection, overheat protection, reverse current protection, solar panel and alternator reverse polarity protection. With a soft-start charging program and a minimum output battery voltage of only 2.5V, this charger is capable of recovering batteries from extremely high depth of discharge. To show target battery charging stage, power source and selected battery type. Battery input voltage: 12.5 – 16.0V. Maximum charging current: 20A. Solar input voltage: 16.0 – 25.0V. Maximum solar input current: 20A. Minimum output battery voltage: 2.5V. Bulk charge voltage: 14.3V (AGM/Gel), 14.0V (Lead Acid), 15.0V (Calcium), 14.0V (Li-ion). Float charge voltage: 13.5V. Float charge current: 100mA. Battery capacity: 18 – 250Ah. Please note: The 3/5/7 mtrs of Red cable supplied in this kit are made up of the 4 separate leads which is ready made with connectors&heat shrink tubes. 3m kit includes everything you need for setup dual battery charging system. 12v 20amp DC to DC Charger. 2 x 250mm RED 70amp READY MADE cable from Battery to fuse holder lead. 1 x 500mm RED 70amp READY MADE cable Relay to fuse holder lead. 1 x 2 metre 70amp Relay to fuse holder READY MADE Lead. 1 metre 70amp of READY MADE Black Earth Lead. 1 Pair 8mm Post Type Battery Terminals. 2 x MTA MIDI Fuse holders. 4 x 60A MTA MIDI Fuses including 2 spares. Red&Black Heat shrink to protect all the connections. 10 x adhesive cable tie fixings base to keep everything tidy. Easy to understand Fitting Instructions + after sales support if required. 5m kit includes everything you need for setup dual battery charging system. 1 x 4 metre 70amp Relay to fuse holder READY MADE Lead. 7m kit includes everything you need for setup dual battery charging system. 1 x 6 metre 70amp Relay to fuse holder READY MADE Lead. We appreciate your business and strived to improve our customer service and our commitment to quality.

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