I have a recently purchased Bavaria 32 (2003). If I’ve remembered the engine model correctly it is a D1-20. Engine starts easily, and all generally seems ok, but twice in the last few weeks just after starting the engine (these were both “warm” starts after having run the engine an hour or two before - but still using the glow plug). Within a few seconds of the engine starting the alternator warning light and alarm come on. Putting her into fast idle gets rid of the alarm, and after a couple of minutes knocking it back to tick over the alarm doesn’t come back. When it’s happened it’s not been a convenient moment to get the multimeter out or even to pop below and check the battery voltages but generally the batteries seem to be getting charged by the engine. I do also have a charger when we are on shore power. Engine has been started and run for perhaps a dozen other times with no issues. Is this anything to worry about or totally normal? The only reason I can think of that it might be happening is the instruments etc will all have been on for a few hours draining the house battery and then at Tickover it is not quite able to put our enough charge to get them back up quickly.
