Hi. I have strange issue with system that was running 3 multipluses 2 5000/48 one per phase but was upgraded to 2 multipluses 2 per phase to increase power. Previously 3 inverters were able to keep charging and discharging so power taken or sent to grid was ± 50W from grid setpoint which meant daily consumption from grid in sunny day was below 1kwh. After adding additional inverters this mechanism seem to not work well - grid setpoint seems like suggestion and power consumed / fed to grid in in ± 4000W ballpark which is directly affected by current power of inverters (big inverter power = big deviation). I tried using external current transducer on inverters but it didnt work at all (i changed each inverter settings in veconfig). Batteries are 18x pytes ebox 48100 so i dont think that they are limiting factor ( basically all the time discharge / charge current limit 900A so well within required) AC cables length at inverter ac out 1 in within 2cm. On cables on Ac in are about 80cm differences. Can this be caused by grid code or some setting?
I resolved this problem. After trying many things i got desperate and was trying different non conventional fixes. In the end it turned out that system works perfectly fine when you disconnect all current transformer plugs from all inverters. It manages to oscillate very close (± 150W) to grid setpoint so basically just like before.
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