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 12 months and is working great and I'm really happy.
In the last days I tried to connect a Honda ex4000s generator, I made the necessary changes to get the generator working.
Unfortunately, I have noticed that if I switch on the generator I have a DC voltage ripple.
This problem occurs especially when I switch on the generator when the solar panels are also producing current. In this situation you can see on the ccgx that the voltage varies continuously in a few seconds from 51v to 53v, after which the system goes into protection and shuts everything down.
I was able to solve this problem by inserting a relay that disconnects the solar panels when the generator is switched on. after about 20 minutes of operation, the problem occurs again.
The cable cross-section is adequate and all connections are correct and stable.
do you know what could be the problem ? the generator current not clean ?