@caesarv
Where do you have your PV grounded?
Also, are you running the inverter on Lead-acid for these batteries?
I have 2 strings of 6 (535W) panels each. Each string provides about 3kW at about 240-250V and are connected to PV1 and PV2. The panels, which are about 200 ft away from my main electrical panel (and the 18Kpv) are mounted on Brightmount racks. The racks themselves are NOT grounded to the house ground, but instead are grounded via two 8-ft ground rods installed. The two positive and two negative leads are floating; i.e neither connected to ground. I do have a four-pole IMO disconnect switch that I can flip if you think this has anything to do with the flickering.
When I get a chance, I will try flipping each of my house circuit breakers, one at a time, to see if I can isolate anything.
I am running 2 sets of 16 EVE MB31 LFP batteries. The (Pace) BMS is properly communicating with the 18Kpv via the CAN bus. The inverter is set to LFP. Settings attached.