CTEK D250SE 11.5-23V Battery Charger | Smart Dual Input Charging
Get the CTEK D250SE 11.5-23V Battery Charger for efficient, smart charging from alternators and solar panels. Ideal for RVs, boats, and off-grid setups.
The CTEK D250SE 11.5-23V Battery Charger is a high-performance, dual-input DC-DC charger designed to provide optimal power management for 12V lead-acid and lithium batteries. Featuring smart alternator and solar panel compatibility, this charger ensures seamless energy distribution, making it perfect for off-grid adventures. With adaptive charging technology and rugged construction, the D250SE delivers reliable power for RVs, boats, trucks, and off-road vehicles.
Best Uses:
✔️ Charging 12V batteries in RVs, motorhomes, and campervans
✔️ Powering boats and marine applications
✔️ Enhancing off-grid solar energy systems
✔️ Supporting trucks, 4x4s, and overland vehicles
✔️ Ensuring efficient battery charging in remote locations
Top Features:
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Automatic Temperature Compensation: Adjusts charging voltage based on ambient temperature for optimal charging in any climate. Prevents overheating and undercharging in extreme conditions.
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Multi-Stage Charging: Utilizes a sophisticated charging algorithm to maximize battery life and performance.
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Compatible with Multiple Battery Types: Charges lead-acid, AGM, GEL, and Lithium (LiFePO4) batteries.
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11.5-23V Input Voltage Range: Works with a variety of vehicle electrical systems.
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Integrated MPPT Solar Regulator: Allows for charging from solar panels (optional accessory).
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Dual Input Charging – Charges from both solar panels and alternators for continuous power.
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Smart Battery Management – Compatible with AGM, lead-acid, and lithium (LiFePO4) batteries.
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Maximizes Battery Life – Multi-stage charging optimizes battery performance and longevity.
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Water & Shock Resistant – Durable, rugged design built for harsh environments.
Top Benefits:
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Reliable Off-Grid Power: Ensures you have power for essential devices and appliances when you're away from grid power.
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Extended Battery Life: Optimized charging algorithms help prolong the life of your auxiliary battery.
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Easy Installation & Maintenance-Free: Simple and straightforward installation with clear instructions.
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Safe and Protected: Protects your vehicle's electrical system and prevents overcharging.
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Versatile and Adaptable: Works with various battery types and voltages, making it suitable for a wide range of applications.
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Efficient Off-Grid Power – Keeps batteries charged from multiple power sources.
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Extends Battery Lifespan – Prevents overcharging and sulfation.
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Ideal for Smart Alternators – Ensures proper charging even with modern alternators.
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Enhanced Power Reliability – Ensures continuous power for critical systems.
Dual input 20A charger with selectable charge voltages
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 and solar panel. 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.
*12V lithium batteries (LiFePO4, Li-Fe, Li-iron, LFP)
Battery separation replacing diodes and VSR relays
- Selectable AGM option – 14.4V or 14.7V
- Maximised charging for better battery life and performance
- Temperature sensor to compensate for hot or cold conditions
- Splash and dust proof (IP65)
- Compatible with SMARTPASS 120, SMARTPASS 120S for the ultimate 140A power management solution
- For professional installation services click here
- 20A fully automatic temperature compensated charging for batteries from 40-300AH while you’re on the move
- Dual input (solar and alternator in parallel)
- Smart alternator compatible
- Selectable lithium* and lead-acid mode
- Solar panel regulator with Maximum Power Point Tracking (MPPT)
ENJOY MORE AND RELAX
With award-winning Swedish technology, the dual input D250SE allows you to enjoy your vehicle more with maximized battery capacity as the ideal charger for vehicles without access to a mains power supply.
TECHNICAL SPECIFICATIONS
Input |
11.5–23V, 25A |
Output |
Max 14.4/14.2/14.7V, 20A max |
Back current drain |
Less than 1Ah/month |
Ambient temperature |
-4°F to +122°F (-20°C to +50°C) |
Battery types |
12V: WET, EFB, Ca/Ca, MF, AGM, GEL, LiFePO4 |
Battery capacity |
40–300Ah |
Insulation class |
IP65 (splash and dustproof) |
Warranty |
2-year warranty |
*) Back current drain is the current that drains the battery if the charger is not connected to the mains. CTEK chargers has a very low back current.
