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.
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
Battery capacity: 40–300 Ah
Charging category: DC charging
Back current drain*: Corresponding to less than 1 Ah/month
Back Current Drain, details: *) Back current drain is the current that drains the battery if the charger is not connected to the mains. CTEK chargers have a very low back current.
Battery voltage: 12 V
Battery chemistry: Lead acid; Lithium-ion
Ambient operating temperature: -20 ˚C to +50 ˚C (- 4 °F to +122 °F)
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.
Ripple**: Less than 4 %
Ripple, details: **) The quality of the charging voltage and charging current is very important. A high current ripple heats up the battery which has an aging effect on the positive electrode. High voltage ripple could harm other equipment that is connected to the battery. CTEK battery chargers produce very clean voltage and current with low ripple.
Battery types: 12 V:; WET; MF; Ca/Ca; AGM; EFB; GEL; LiFePO₄
Degree of protection: IP65
Gross weight (unit in box): 0.9 kg
Dimensions (L x W x H): 192 x 110 x 65 mm
Net weight (unit with cables): 0.7 kg
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