CTEK D250SE 12V 20A DC/DC Battery Charger
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CTEK D250SE 12V 20A DC/DC Battery Charger

SKU: 40-315 Learn More»

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CTEK D250SE 12V 20A DC/DC Battery Charger


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)



  • Output Current Rating 20.0 Amps
  • Input 11.5–23 V, 25 A
  • Output 14.4/14.7 V, 20 A max, lead-acid battery types. 14.2 V, 20 A max, LiFePO4
  • Back current drain* Corresponding to less than 1Ah/month
  • Ripple Less than 4%
  • Ambient temperature -20˚C to +50˚C
  • Battery types WET, MF, Ca/Ca, AGM, EFB, GEL, LiFePO4
  • Battery capacity 40-300Ah
  • Warranty 2 Years
  • Insulation Class IP65



  • 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)
  • 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 for the ultimate 140A power management solution


Dometic Harrier Brochures
Dometic Harrier Operation Manual

SKU 40-315

Brand CTEK

GTIN 7340103403159

Product Category Battery Chargers

Voltage 12V

Output Current Rating (Amps): 20 A

Dimensions: 192 x 110 x 65 mm

Weight: 0.7 kg

NOTE: see full product specifications & further product info in the Description section on this page.

Warranty Period: 2 Years

Warranty Details: Please CLICK HERE for Warranty Information on this product

  • We ship Australia-wide with national road express freight companies such as Star Track, TNT and Toll.
  • Small Items are sent with Australia Post via regular post.
  • Delivery times are generally 3-5 days from day of dispatch for major cities (sometimes quicker). Please allow longer for regional and remote areas.
  • Once your item(s) have been dispatched, we will provide you freight tracking information so you can track your delivery to your door.
  • Items are fully insured during the freight process.
  • Unfortunately we cannot deliver to PO Boxes.
  • For further details on our Delivery Process you can visit our Delivery Page HERE.

Important Covid-19 Comment: during these difficult times, our dispatch and delivery times are longer than normal. Please allow additional days for delivery over and above the normal estimates outlined above.

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