Sterling Alternator Regulator v Sterling Alternator-Battery Charger

[boatone]

The only significant problem I had was with the Volvo Penta engine management system, the Sterling A to B stops charging the starter battery after a while (because starting the engine takes very little in the way of amp hrs) and the battery voltage drops to reflect this, but the engine management system is “smart”, it know the alternator is running, but see a lower than expected voltage on the starter battery and it sounds a battery fault alarm, this was really annoying (and Sterling couldn’t help, they just said they had never heard of this before). The solution was to simply swap the battery sensing wire form the starter battery to the domestic battery bank.

Your post leads me to wonder if this same issue might be the clue to problems I am having with a twin TMD22A installation.
I have recently reorganised the battery arrangement so that both engines are served by a single starter battery and both/either alternators charge both the starter and domestic (3 x 100Ah in parallel) batteries. I also installed an Adverc BM system at the same time with advice from Adverc regarding the wiring configuration for the twin engine/single starter battery setup. This included fitting an additional splitting diode between the ignition feeds to prevent cross-talk.
As you say, the starter battery doesn't take much to top up and I get alarms on one or the other engine indicating that the alternator has shut down.
Is it possible that leading the battery sensed connection for BOTH alternators to the domestic bank may be the answer to resolving the problem?
Adverc also say they have not come across the problem before !