I had a system consisting in approx. 7 kwh installed solar panels, one Fronius Symo 10.0-3, one LiPo battery of 5.5 kwh and a Multiplus 3000/48 inverter installed on Phase 1; everything works flawlessly. However, I decided to upgrade the system adding one more LiPo battery of exactly the same capacity therefore I needed a more powerful inverter to charge the batteries quickly. I purchased and installed a Multiplus II GX 5000/48. After this nightmare started. Having exactly the same settings and charging parameters, the inverter is charging and discharging on every 10 seconds no matter what other settings I modified. I found another thread where a “EasySolar 48/3000 / 35-50”
https://community.victronenergy.com/questions/9810/easysolar-ess-randomly-switches-charging-dischargi.html is having similar behaviour but at a lower frequency between charging and discharging. I am using .481 firmware with ESS. I am finally using HUB-4 assistant that works ok’ish.