CTEK SMARTPASS 120S and 250SE DC to DC charger basic features and install information

[bakepl]

Can anyone help me understand whether the alternator sensing wire for smart alternator should be connected when installing the CTEK D250SE to the Ineos installed CTEK 120S (mine is the unbranded one without a consumer load point).

I used the GPFactor bracket and everything is installed except that alternator wire. I can't figure out if I need to connect it.

View attachment 7907094

Info is somewhere here but Ctek say if in doubt as to what alternator you have... connect the wire. I guess it sorts itself out...

 

[TheDocAUS]

Can anyone help me understand whether the alternator sensing wire for smart alternator should be connected when installing the CTEK D250SE to the Ineos installed CTEK 120S (mine is the unbranded one without a consumer load point).

I used the GPFactor bracket and everything is installed except that alternator wire. I can't figure out if I need to connect it.

View attachment 7907094

Mine was installed by XHQ and they did not attach the red wire. Mine has worked correctly. AU Spec diesel with INEOS dual battery setup.

 

[LabRat]

Has anyone hooked it up? I did mine, as many described here without attaching the red wire. Seems to work just fine.

 

[MK898]

Good morning, here is an answer to my question to Ctek about whether the battery selection cable needs to be connected to +12 volts when a LiFePO4 battery is installed as an auxiliary battery, exactly as Ctek describes it in its manual.

 

[MK898]

Good morning,


Thank you very much for your inquiry.


Since you are using a lithium battery (LiFePO?) as a service battery, you need to connect the battery selection cable from the D250SE to +12 V. This is necessary for the charger to activate the lithium charging profile and charge the battery correctly.


If the cable is not connected, the charger will use the standard profile for lead-acid batteries, which is not suitable for lithium batteries.


Kind regards,
Sara Wester Movarp

 

[cdsvt]

Is the factory 2nd battery a lithium battery? I thought it was a flooded lead acid battery.

 

[Clark Kent]

Is the factory 2nd battery a lithium battery? I thought it was a flooded lead acid battery.

Both factory batteries are Enhanced Flooded Battery (EFB) chemistry. They sit in between standard lead acids and AGM.

@MK898 posted a copy of the question he asked Ctek at post #484 specifically for his case where he has swapped out the auxiliary battery for a lithium battery. It's a bit confusing because he posted his question and Ctek's response separately. You need to read #484 and #485 together.

Ctek have reconfirmed the status of the red wire at the Smartpass 120S (where fitted). Connect it for lithium batteries. Leave it disconnected for lead acid batteries.