Energy meter fluctuation

[jee (Jochen snauwaert)]

Three phase mp2 5000/48 system, cerbo, 16 x pylontech us5000. Critical loads on ac out.
I noticed the energymeter fluctuates lot:

Any ideas how to get the system more “stable”?

[cmock (Christian Mock)]

What type of meter is it? What are the relevant settings (assuming ESS is in use, “grid metering” and “multiphase regulation” in the ESS menu)?

[jee (Jochen snauwaert)]

Its the em540 to usb wirh the cable extended to 30 meters, wich should not be a problem.
Screenshots of the system: