Ctek Automatic charger D250S DUAL D250S DUAL Manual De Usuario

EN • 3

on the purchase of your new CTEK professional battery management unit. This unit is part of a 

range of professional battery chargers from CTEK SWEDEN AB. It represents the latest technology 

in battery charging. Using the CTEK D250S DUAL and SMARTPASS products, you can maximize 

the performance of your 12VDC source. 

• The unit is designed for 12V lead-acid batteries. Do not use the unit for any other batteries.

• Use safety glasses when connecting or disconnecting a battery.

• Battery acid is corrosive. Rinse immediately with water if acid comes into contact with skin or 

eyes. Seek medical advice.

• Make sure that the cables are not being pinched and are not in contact with warm surfaces or 

sharp edges. 

• While charging, a battery can emit explosive gases; avoid sparks in the immediate area.

• Always provide for proper ventilation during charging.

• Avoid covering the unit.

• D250S DUAL is not reverse polarity protected.

• Disconnect battery poles before installation

1. Connections from the battery must be fused close to the battery.

2. Batteries must be permanently mounted in ventilated areas.

3.   Cables must be placed in tubes, separated from cables for 230V (shore power), or be attach to 

the surface every 300mm.

4. Cables in the engine room must be rated to withstand 700C

The D250S DUAL has 2 inputs. The Service battery will be charged from the alternator, solar 

panel, or both in combination. The solar panel adjusts itself to the Starter battery voltage. The 

Starter battery will be charged and maintained directly by the solar panel if the Service battery 

is fully charged.

• Multi-step 20A temperature compensated battery charging and battery maintenance. 

• Battery separation of Starter and Service batteries. 

• Maximum power point tracking for solar panels charging the Service battery. 

• Two power source inputs (alternator, solar, wind, Supply battery and other).  

• Coordination of the two inputs, allowing parallel operation.  

• The auxiliary input will also charge and maintain the Starter battery.