CTEK D250T and SMARTPASS 120T DC/DC Battery Charger User Manual

About this manual

This manual provides instructions for the CTEK D250T DC/DC battery charger and the SMARTPASS 120T power management system, designed for 24V lead-acid battery systems. The D250T is a vehicle-mounted charger that uses a 4-step automatic charging algorithm to maintain the service battery while the engine is running, featuring temperature compensation and battery separation to prevent discharge of the starter battery. The SMARTPASS 120T manages power distribution from the alternator to the service battery and auxiliary loads, offering dynamic overcurrent protection and intelligent alternator support. This manual is written in Chinese.

What's inside

• Safety Precautions
• General Information
• Installation
• Cable and Fuse Requirements
• Function Indicators
• Error Indicators

Frequently asked questions

What battery type is the D250T and SMARTPASS 120T designed for?

The D250T and SMARTPASS 120T are developed for use with 24V lead-acid batteries.

What is the maximum current the SMARTPASS 120T can provide to service batteries and parallel devices?

The SMARTPASS 120T provides a maximum of 120A of current to the service battery and parallel devices.

What is the maximum thickness of the ring terminal allowed for cables connected to M8 terminals?

The maximum thickness of the connected ring terminal is 6 mm.