Suppliers of quality power products for the 4x4 and Outdoor Enthusiast

CTEK D250SE Smart Alternator DC-DC 20A battery charger (Lithium incl) with solar input


SKU: CHG-CTE-D250SA Category:


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 350A of power to any 12V lead acid service battery from 40-300Ah, including Wet, EFB, MF, Ca/Ca, AGM, Gel and Lithium. It has selectable charge voltages for AGM 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 D250SA 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.

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
Battery separation replacing diodes and VSR relays
Solar panel regulator with Maximum Power Point Tracking (MPPT)

Selectable AGM or Lithium 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
2-year warranty


Features & benefits:

  • Five step, fully automatic DC-DC switch mode charger with float/pulse maintenance.
  • Charges lead-acid batteries (Wet, MF, GEL, AGM) and Lithium batteries.
  • Maintenance pulse charging increases battery life and gives superb performance.
  • High efficiency: 95%.
  • Compact design with mounting holes for permanent assembly.
  • 2 year warranty.Specifications:
    Type of charger Five step, fully automatic switch mode with float/pulse maintenance
    Type of batteries 12V lead-acid batteries (Wet, MF, AGM, GEL & Lithium)
    Battery capacity 40 to 300Ah
    Maximum input voltage 22VDC
    Maximum input watts on solar input 250 Watts
    Output voltage and current 14.4VDC 20A max
    Connect voltage from 13.1V for 5 seconds
    Disconnect voltage below 12.8V for 10 seconds
    Cooling Natural convection
    Dimensions (L x W x H) 197 x 93 x 49mm
    Insulation IP 65 (splash and dust proof)
    Weight 0.73kg