Electrical setup:
Pair of Multiplus 12/2500/120 in parallel
Mase 5.7kW generator, both manual and auto start
600Ah Battery bank
External Transfer switch mounted in what looks like a Victron AC transfer box
All controlled by a VE.NET system
I was asked to change the charging parameters. When I downloaded the existing settings although the two Multipluses were wired in parallel and connected together by a communication cable (not RJ45) no selection had been made in the setting for Master, so as part of the changes I selected the Multiplus that was wired as the master to have 1 slave.
The charging changes went OK and operated.
As part of the normal testing I tested all of the systems for operation and discovered that with the generator running and a nominal 1500W AC load that the load was being powered from the Inverter not the generator (see picture Will VENET display).The DC load at the time where order of 2 or 3A.
Power Assist was set to on with a scaling factor of 2.
The problem is that the Multipluses had not have gone into Power Assist and should not have been power the AC load of 1500W and even by altering the scaling factor to 1 or 3.5 the other alternatives the Multipluses continued to take the whole AC load as if the generator was not running. The only way I could stop it was to turn Power Assist off.
This is an all electric boat AC cooking etc and relies on the generator for cooking etc and if the cooking etc is using the 600Ah of battery they will not last very long. What is happening could explain the owner’s problems that his batteries never seem to get fully charged.
To assist I include photos showing the settings of the master Multiplus, in the photo power assist is turn off but was turned on with a scaling of 2 for the tests.
Is this a set-up problem or what ?? Help
