CTEK D250SE 20A Lithium DC/DC Battery Charger

The dual input CTEK D250SE Lithium Battery charger can draw its power from smart alternators and DC sources, making it the ideal charger for vehicles that don't have access to a mains power supply.  Its dual input capability means it can draw power from solar and wind sources, in parallel to the alternator.

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)


FASTER CHARGING
The D250SE automatically delivers the optimum charge so your batteries are fully charged in the shortest possible time. You can select normal or 14.7V AGM charge voltages. It also has a temperature sensor to compensate for hot or cold conditions and avoid the risk of your battery overheating or overcharging.

DIRECT CONNECTION FOR SOLAR POWER
The D250SE has an input for connecting solar panels without the need for a regulator. It also features a Maximum Power Point Tracker (MPPT) to get the maximum power out of your solar panels.

Features

• 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 data

Battery capacity

40–300 Ah

Charging category

DC charging

Back current drain*

Corresponding to less than 1 Ah/month

Back Current Drain TEXT

*) 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 (AGM, GEL, EFB, MF, CaCa); Lithium (12 V LiFePO₄)

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 TEXT

**) 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

Ingress protection

IP65

Dimensions (L x W x H)

192 x 110 x 65 mm

Net weight (unit with cables)

0.7 kg

Gross weight (unit in box)

0.9 kg

MPPT

Yes

Warranty