I built a stand alone system consisting of 1Kwp of solar panels, a Victor mppt charge controller, a Multiplus II and a 16s 48v 176Ah lithium battery pack.
the system has been running for about 4 months and is working great and I'm really happy.
In the last days I tried to connect a Honda ex4000s generator, unfortunately initially the system did not accept it, and I had to change the software settings.
I disabled the UPS function, enabled the dynamic load limiter and enabled the WEAK Ac input.
With all these values set, the multiplus was able to recognize the generator and charge the batteries with a current of 20A.
On the CCGX, however, were not shown the watts entered into the system by the generator and Ac loads, for both loads were shown 0w, while in the detail of the battery was shown + 1000w approx. (This is the first problem)
The real problem is that after a few minutes that the generator is on and the batteries are charging the multiplus turns off and then back on without recognizing the current of the generator and taking the current for the loads from the battery.
I have noticed that the voltage of the batteries during charging varies from 54 to 57V in a few seconds oscillating up and down just before shutting down. It does not do this initially, initially the voltage rises smoothly and slowly. However, it does not report a DC Voltage ripple alarm.
I also noticed that the voltage and frequency of the generator varies suddenly before shutting down. The voltage goes from 215v (strange because the generator output is 230v) to 236v while the frequency goes from 50hz to 52.8hz after which the multiplus II shuts down.
Another thing I noticed is that the status of the charger doesn't reflect the state of charge it should have, even if the batteries are discharged, the "Absorption" function comes on after a few seconds instead of starting in "Bulk".
The change in voltage and frequency could be the change in load, but why is the multiplus shutting down ? With the current settings according to the Victron manual the multiplus should be compatible with any generator, simply having less efficiency.....
All connections have been checked and are all tight, even the cable sections have been checked.
Thanks in advance for your help