See my post today.Mine stops with the air con on but not if I have only been doing short journeys round town. When I have done a few miles on decent roads (bypass/motorway etc) it's fine. Obviously it needs sufficient journeys to build up enough battery backup to carry on running everything.
It will not work if there is a large enough electrical draw on the system
On mine it will not operate with AC turned on or of the fan is on setting 2 or above
on the last but one visit to the VW garage they fitted a new battery (apparently)As mentioned it will only kick in when the draw is low and the battery at 80%, however, if youhave a faulty battery it may not be holding sufficient charge.
There is currently an ongoing issue with Moll type batteries, check your battery type.
thanks....Just lift up the top flap over the battery and see what’s wrote on it, varta AGM are the good ones and Moll EFB are the ones loads of people are having issues with
Wish I knew someone local to turn mine off! On my t6 and my transit I absolutely hate the thing!