This message is now moved twice. 
Please ignore my comment about my actual frequency problem. This disapeared and was caused by not setting up the charger in the multis correctly. (I introduced AC coupled solar the first time into my setup…)
https://community.victronenergy.com/t/micro-inverter-plus-victron-3-phase-system/9978/8?u=marc_hd
A big thank you to the victron team, both technicians and management, to provide a beautyfull system! And being open to free open source software.
Have fun
Marc