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EN • 7

TECHNICAL SPECIFICATION

I2420

I2440

Model number

1320

1340

Input

220–240VAC, 50–60Hz, max 3A

220–240VAC, 50–60Hz, max 7A

Output

24V, 20A

24V, 40A

Start voltage

0.5V

0.5V

Back current drain*

Less than 1Ah/month 

Less than 7Ah/month 

Ripple**

Less than 4%

Less than 4%

Ambient temperature

-20°C to +50°C (-4°F to +122°F)

Battery types

All types of 24V lead-acid batteries (WET, MF, Ca/Ca, AGM, GEL) and Lithium-ion (LiFePO₄, LFP)

Battery capacity

40–300Ah

100–1500Ah

Dimensions

See DIMENSIONS

Insulation class

IP64

Weight

1,4 kg

3,0 kg

Warranty

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. CTEK battery chargers produce very clean voltage and current with low ripple.

LIMITED WARRANTY

CTEK issues this limited warranty to the original purchaser of this product. This limited warranty 

is not transferable. The warranty applies to manufacturing faults and material defects. The 

customer must return the product together with the receipt of purchase to the point of purchase. 

This warranty is void if the product has been opened, handled carelessly or repaired by anyone 

other than CTEK or its authorised representatives. CTEK makes no warranty other than this 

limited warranty and is not liable for any other costs other than those mentioned above, i.e. 

no consequential damages. Moreover, CTEK is not obligated to any warranty other than this 

warranty.

SUPPORT

For support, FAQ, latest revised manual and more information about CTEK products:  

www.ctek.com.

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