03-07-2021, 04:37 PM
I recently purchased a 2008 4300 Sovran and been fighting with an electrical issue.
Boat Details:
2 Volvo Penta, D6 435 with IPS drives
Each Engine has 2 (yes 2 ) alternators
Boat has 8 brand new AGM batteries - 5 house and 3 engine
To Summarize:
when I run at higher than idle RPM's I often get an error that shows up on my Prosine inverter display saying over voltage or over charging of Prosine battery and attempts to restart. The analog voltmeter on the DC system panel shows house voltage often off scale at greater than 16 volts.
I found that if I disconnect the starboard alternator( call it the inboard alternator) on the port engine the over voltage alarm does not occur, just to be sure I did an A-B-A test and disconnected the port alternator (outboard alternator) on port engine the alarm still happens. I then ran the boat for a few hrs with the inboard alternator disconnected and all was well for a bit but then I started noticing the digital voltage readout on the multifunction Volvo Penta displays at the helm started showing erratic voltages for the port side with values typically ranging 16-18 volts and quite noisy. The starboard voltages were flat lined at 14.2 volts.
I have tried to clean up all the contact points on the inboard alternator but to no avail, it is still happening.
Do I just need a new alternator ore is there a different potential cause?
Regards
Mbenham13
Boat Details:
2 Volvo Penta, D6 435 with IPS drives
Each Engine has 2 (yes 2 ) alternators
Boat has 8 brand new AGM batteries - 5 house and 3 engine
To Summarize:
when I run at higher than idle RPM's I often get an error that shows up on my Prosine inverter display saying over voltage or over charging of Prosine battery and attempts to restart. The analog voltmeter on the DC system panel shows house voltage often off scale at greater than 16 volts.
I found that if I disconnect the starboard alternator( call it the inboard alternator) on the port engine the over voltage alarm does not occur, just to be sure I did an A-B-A test and disconnected the port alternator (outboard alternator) on port engine the alarm still happens. I then ran the boat for a few hrs with the inboard alternator disconnected and all was well for a bit but then I started noticing the digital voltage readout on the multifunction Volvo Penta displays at the helm started showing erratic voltages for the port side with values typically ranging 16-18 volts and quite noisy. The starboard voltages were flat lined at 14.2 volts.
I have tried to clean up all the contact points on the inboard alternator but to no avail, it is still happening.
Do I just need a new alternator ore is there a different potential cause?
Regards
Mbenham13
