Re: Generator question - Onan 8000
Reply #2 –
Your genset starts on low voltage, so it should stop on high voltage. Id Est, the Cummins EC-30 board is "seeing" the battery voltage. Maybe the stop at voltage has been set too high? Perhaps lowering the voltage to 13.6V would give you at least a "proof" that the board is functioning correctly? Conversely maybe setting the Start at voltage to something less than 12.0V might give you something to consider?
From page 9 of the Cummins Onan Operator and Installation Manual.
STOP @ V
The STOP @ V is the voltage to which the house
battery must rise to cause the genset to automatically stop due to a full battery. The default value is Auto
which stops the genset when three bars are displayed
in the battery level indicator. See the Operation section
of this manual. The STOP @ V voltage range is 13.2-
14.5 volts. A lower voltage will not fill the battery as full
but it will reduce the amount of time the genset will run.
A higher voltage will fill the battery to a higher state of
charge, but increase the amount of genset run time. If
the charge system is unable to reach the STOP @ V
voltage, the result will be excessive genset running.
This setting does not change the battery charging voltage. Do not set STOP @ V above the voltage of
the battery charger.
https://www.cummins.com/sites/default/files/2018-08/900-0541B-energy-command-operation.pdf
Topic: Generator question - Onan 8000