Ctek D250SE Dual Charger Charge Controller
Ctek D250SE Dual Charger Charge Controller
Ctek D250SE Dual Charger Charge Controller

Ctek D250SE Dual Charger Charge Controller

Ctek D250SE Dual Charger Charge Controller

Regular price R 10,197.00 incl. VAT Sale price R 7,553.00 incl. VATSave R 2,644
R 6,56783 excl. VAT
incl. VAT/

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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 support on the go
  • Smart alternator compatible
  • Achieve maximum power from your solar output
  • Charge service and starter batteries
  • Built-in temperature sensor
  • 12V | Dual input 20A charger with selectable charge voltages
  • 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, SMARTPASS 120S for the ultimate 140A power management solution
  • 2-year warranty
  • Charging category DC charging

Technical Data

  • 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.
  • Battery chemistry: Lead acid; Lithium-ion
  • Battery types12 V:; WET; MF; Ca/Ca; AGM; EFB; GEL; LiFePO₄
  • Battery capacity: 40-300 Ah
  • Back current drain: *Corresponding to less than 1 Ah/month
  • Battery voltage: 12V
  • Ambient operating temperature: -20 ˚C to +50 ˚C (- 4 °F to +122 °F)
  • Ripple: **Less than 4 %
  • 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
  • MPPT: Yes
  • Warranty: 2 years

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.

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.

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.


All solar products, power systems, water heating and gas products and their components must be installed by appropriately qualified personnel. All installations must adhere to local wiring regulations and standards. Sustainable Online will not be held liable for any product malfunctions as a result of incorrectly installed systems.

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