Dual input 20A charger with selectable charge voltages

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.

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. *) 12V lithium batteries (LiFePO4, Li-Fe, Li-iron, LFP)

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)
*) 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
2-year warranty

Technical information

Ambient operating temperature: -20 ˚C to +50 ˚C (- 4 °F to +122 °F)

Positioning: Permanent installation / on board

Warranty: 2 years

Input: 11.5–23 V, 25 A

Output: 14.4/14.7 V, 20 A, lead-acid battery types. 14.2 V, 20 A, LiFePO₄.

Back current drain*: Corresponding to less than 1 Ah/month

Battery types: 12 V:, WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO₄

Battery capacity: 40–300 Ah

MPPT: Yes

Net weight (unit with cables): 0.7 kg

Gross weight (unit in box): 0.9 kg

Ingress protection: IP65

Ripple**: Less than 4 %

CTEK D250SE DUAL DC to DC Charger