There seems te be a problem with the data comming from the et340 grid meters that we have installed for multiple clients and they are all acting strange.
The Total grid value is fluctuating a lot and it is forcing the batteries to go into charge and discharge all the time. The Ess phase compensation for a single multiplus2 in a three phase grid was working before and it reacted to the values from the grid meter, only problem is that these now go from minus to positive in 5sec and forces the ess to change constantly. Is there a problem with the meter, rs485 connection or do we need a current transformer to get these readings correct?
All firmware updates have been done to latest version and still no changes.