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MANUAL
CONGRATULATIONS
on the purchase of your new professional switch mode battery charger. This charger is
included in a series of professional chargers from CTEK SWEDEN AB and represents the
latest technology in battery charging.
INTRODUCTION
Read safety instruction and this user
instruction before use of the charger
• Connect AC cable according to national regulations.
• Important: Fixed installation has to be carried out by certified installation and in accord-
ance to local regulations.
• Mount the charger on a firm surface. Fix the charger with screws in the four holes. Use
suitable screws or fixings. Allow space around the charger to not interfere with air
cooling.
• The charger is manufactured and constructed for industrial use and is used for 230V
only.
• I2420 and I2440 can be left connected for unlimited periods of time with no risk of
damaging the battery.
• There is a built-in temperature sensor to ensure that the charger won't overheat.
• The charger is programmed with a generic lead acid charge algorithm. If special charg-
ing requirements, the algorithm can be changed using the service tool accessory (not
included).
FEATURES
• 24 V, 20/40A
• Suitable for all Lead-Acid and Lithium-ion (LiFePO₄, LFP)
• Programmable for different algorithms
• Records 200 charge cycles, accessible with the service tool accessory
• Easy to read LED and remote LED accessory
• Automatic reconditioning for deeply discharged batteries.
• Temeperature compensated charge voltage
• Drive Off protection
• 94% effency
• IP64 rated
LED display
Earthed AC cable
without plug
DC cable
Andersson
connector, 50A
Communication-
cable, RJ45
EN • 3

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Summary of Contents for CTEK I2440

  • Page 1 • The charger is manufactured and constructed for industrial use and is used for 230V only. • I2420 and I2440 can be left connected for unlimited periods of time with no risk of damaging the battery. • There is a built-in temperature sensor to ensure that the charger won’t overheat.
  • Page 2 DIMENSIONS I2420 DIMENSIONS I2440 135,5 mm 224 mm 285 mm 169,25 mm 160,50 mm 151,75 mm 232,5 mm 193 mm 41,25 mm 32,50 mm 23,75 mm 148 mm 4 x R3 52,5 mm 74 mm 236 mm 80 mm 4 • EN...
  • Page 3 CABLE LENGHTS INDICATOR INDICATOR EXPLANATION SYMBOLS CHARGER ACCESSORY Green light Green light Battery fully charged Mains connected, no battery connected. DC cable 500 mm Absorbtion Green light Green light charging Battery fully charged, charger in battery Communication cable 450 mm maintenance mode (please see "CHARGING CURVE") Bulk charging...
  • Page 4: Charging Curve

    STEP 3 BULK Charging with maximum current until approximately 80% battery capacity. The I2420/I2440 charger can be customized with other algorithms using the Service Tool STEP 4 ABSORPTION accessory (not included). Charging with declining current to maximize up to 100% battery capacity.
  • Page 5: Technical Specification

    2 year *) Back current drain is the current that drains the battery if the charger is not connected to the mains. CTEK chargers has 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.

This manual is also suitable for:

I2420