Anyone know why my ctek jumps staight to 15v charge?

[Workper]

Just re installed my battery and ctek charger into my new van but the charger seems to be jumping staight up to 15v it never did this before in my last van don’t think I ever saw it reach 20v

 

[Spaghetti]

just posted this in the other thread as you mentioned it there:

Airbag warning light after fitting leisure battery under seat!

Just installed my leisure battery but before putting the seat back on I check it was all working as it should.. which it’s is. Yyyyaaayyyy But now I have and air bag error. Which has to be when I started the van with out the seat on.. can I unplug the battery and leave for 12 hours to remove...

www.t6forum.com

 

[Dellmassive]

What, where are you using to meter the 15v?.

What battery setting have you got the ctek set to? (AGM?)

As per @Spaghetti BM2 battery monitor chart, 14.9v is a full charge rate indicating a low AGM leisure battery........ which will drop.down to a lower voltage 13.6v is as the leisure battery charge rises....

 

[Workper]

What, where are you using to meter the 15v?.

What battery setting have you got the ctek set to? (AGM?)

As per @Spaghetti BM2 battery monitor chart, 14.9v is a full charge rate indicating a low AGM leisure battery........ which will drop.down to a lower voltage 13.6v is as the leisure battery charge rises....

yes mate I’ve wired the black wire to negative as shows for the agm.
im looking at this

 

[Workper]

yes mate I’ve wired the black wire to negative as shows for the agm.
im looking at this

 

[Workper]

Soon as I start the van it goes up to 15
I’m baffled

 

[Dellmassive]

Its charging the battery....

Whst voltage were you expecting when its charging?

Re, @Spaghetti

.



.

 

[Dellmassive]

 

[Workper]

So apparently 15v charge is ok.
hear is what ctek have said about it

 

[Spaghetti]

That’s good customer service from CTEK.

The temperature compensated charging is via the little sensor that is stuck by the +ve terminal of the leisure battery.

 

[t0mb0]

My votronic unit can get up to 15v with temperature compensation.

 

[Dellmassive]

15v is normal across the starter AGM battery when Regen braking and decelerating . .


more info . . . .

Stop/start...regen...smart Alternator... Dc-dc Charger For Leisure Battery Or Not?

So With all the talk regarding the Bluemotion thing and regen breaking and leisure batteries our T6 has finally arrived. The first thing we done was to checkout the factory fitted setup,...... Stop/start=check, Regen Braking=check, AGM starter battery=check leisure battery under passenger...

www.t6forum.com

 

[Workper]

That’s good customer service from CTEK.

The temperature compensated charging is via the little sensor that is stuck by the +ve terminal of the leisure battery.

Yes really good customer service. Everything is as it should be now yaaaay

 

[Workper]

15v is normal across the starter AGM battery when Regen braking and decelerating . .


more info . . . .

Stop/start...regen...smart Alternator... Dc-dc Charger For Leisure Battery Or Not?

So With all the talk regarding the Bluemotion thing and regen breaking and leisure batteries our T6 has finally arrived. The first thing we done was to checkout the factory fitted setup,...... Stop/start=check, Regen Braking=check, AGM starter battery=check leisure battery under passenger...

www.t6forum.com

It was the leisure battery showing 15v but saying that I don’t actually now what the starter battery was reading I should have checked

 

[Spaghetti]

The starter battery will vary from 12ish volts up to 15v, depending on whether the alternator is running idle, charging, engine braking or regenerating the DPF.

 

[Big.mac]

CTEK charging profiles are as below: 14.7V is normal for an AGM battery

 

[Workper]

CTEK charging profiles are as below: 14.7V is normal for an AGM battery

View attachment 91547

Mine must have been in Desulphation glad to everything worked out phewww lol