On a number of ESS installations the current measured on the grid side of the system is way off. See below for some examples. On all of the system examples below the grid is in series with the Muliplus and the measurment is performed by Multiplus.
Image 1 is a Multipus II 48/5000 and the other two images are Mulitplus II 48/15000.
Any insights appreciated?
It is a quirk of VRM, been like that as long as I can remember.
Thanks. Is it likely to be resolved do you think?
I have raised it a couple of times but just live with it.
Hope springs eternal 
Is taking another Grid meter a possible solution ?
I dont know if the power is correct or the current is correct … we have same issues here.
I have the same issue. I tried an external CT for measurement and the current the Multi II (2x 5kVA in parallel) was reporting was about 2x the current read with a Fluke Clamp at the same point. I thought it was the CT that was at fault and measuring the CT directly with a Fluke gave me a current reading closer to the clamp, but still a bit off. I then tried the internal CT and seem to remember the same thing happened. I then switched to an ET112 and noticed the same issue with a ~120W power reading and 2.2A current at 230V. I did notice that sometimes the ET would read the current correct as below.
2.2A is seen frequently, so I am wondering if there is a problem with the resolution of the ADCs, if ADCs are used.
I see the incorrect readings on the GX and then obviously on VRM as well. Does anyone have an idea where these inaccurate readings come from? Is it software, hardware, a lack of factory calibration?