I have a Xantrex XBM
battery monitor.
My propshaft
alternator needs 3a at 24v for the field coils
My propshaft
alternator begins producing
power at just under 5 knots
So at around 5 knots the XBM
monitor fluctuates between plus amps and negative amps, sometimes every second or so.
If this goes on for a long time then the monitor might increase the % of
battery capacity from lets say 70% at the start to 75% by the time I have anchored 8 hours later.
The battery voltage at the time the propshaft alt is switched off is 28.4v
So it seems that the
batteries are fully charged but somehow the %age increase was not increased.
I can verify that the
batteries are full by switching on the
generator and seeing the battery acceptance is down at around 10 amps and the voltage goes quickly to 28.4v.
When
charging stabily using the
engine alternator or the battery
charger then the XBM monitor does increase the %age of battery capacity.
Does anyone have any ideas on this.
I think that Rick designs battery monitors so maybe he would know?
Thanks john