CTEK behaviour

[Mistral1]

I have had a CTEK 250 fitted to my camper for the past 18 months and it is working exactly as it should with the expected indicator lights etc.
However I am now a bit confused. I have fitted a battery optimiser to the Starter battery and when I switch it on the CTEK indicates that it is charging the Leisure battery (despite the ignition being switched off)and a check of the voltage confirms this to be the case. However I have correctly connected the ignition switched live cable, and when the optimiser is not connected it works exactly as it should. Am I missing a feature of the CTEK that is allowing this to happen?

 

[Dellmassive]

That's normal.. we call it auto VSR feature..

Assuming you are refering to a battery charger being connected to the Starter battery.

 

[Dellmassive]

The ctek is detecting the higher starter voltage and switches on.

The IGN feed is just to enable it to work with a lower starter battery voltage.

 

[Dellmassive]

[Guide] DC-DC Charger (for leisure battery) -- How I Done It --

@Farnorthsurfer did you set the Dc-dc to lithium mode for the TN100 battery? Also have you got any more BM2 views showing more days? Yes the unit is set to Lithium profile. Easy enough to do when it was powered up. Yesterday was a flat line all day as it just sat on the drive. Back to work...

www.t6forum.com

 

[Dellmassive]

More.

Charging Starter and Leisure batteries with same charger - Victron

Hi, Inspired by @Deaky build post, I was planning on installing a Victron IP65 Smart charger next to the Starter Battery and a 2nd one to charge the Leisure batter (110AH AGM). I've discovered the CTEK D250SE will still charge the leisure battery as long as the volts on the starter battery are...

www.t6forum.com

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[Mistral1]

Thanks guys as long as it’s normal behaviour
Cheers Paul