I'm being dense - but how would the aux battery charge when the alternator is off?
I'm learning on this as we go, we really need to understand the design philosophy from Ineos and in particular the details of what it has in the BCM/software that essentially does the same thing as the Smartpass loose red wire - which is the initial take I get from
@Logsplitter's reply from Ineos.
Hopefully we will get to hear the root cause analysis for
@das mo's issues.
Whilst not in actual parallel other than for "smart assist", the manual states:
"The service battery trickle charges the starter battery without assistance from the solar panel or alternator to compensate for the self-discharge of the starter battery. The service battery charges in 3-second pulses when its voltage is higher that of the starter battery and the voltage of the starter battery is low".