Random voltage 14.0v then 11.7v

[BRABUS]

I have a 12v switched socket plugged into my central cigarette socket. This has a voltage reading on it and today while driving on the motorway I noticed that one minute the voltage is14.0v then it drops to 11.7v for a while and then goes back to 14.0v

I should add it’s a 2022 T6.1 with no leisure battery to confuse things. Has anyone got any ideas please as this doesn’t seem right to me.

 

[The Bear78]

I'm guessing it's the smart alternator coming on and offline, maintaining the starter battery between 80 and 100%.

 

[ginkster]

That’s the smart alternator doing its business. Normally the voltages will be in the range 12.3 to 14.9 ish so maybe your socket is under reading slightly or voltage drop in the cable.

 

[BRABUS]

Shows I know nothing, off to Google smart alternators now. Cheers.

At least I won’t panic now and think I am about to break down.

 

[Dellmassive]

smart Alternator - totally normal.

15v on regen braking.

run blower fan on #2 for around 13.2v

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

30 Apr 2018

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 bench-standard lead acid=oops!
standard relay and fuse holder for charging thge leisure battery=check . . . hmmm?

So the factory standard setup is stop/start/regen with AGM starter battery, ok, so i ask the sales guy why i haven't got a second AGM battery under the passenger seat, (for balanced...

• Dellmassive
• battery sensor dc - dc charger stop/start
• Replies: 115
• Forum: Electrics, Lighting, ICE, Security

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