I think I found a bug in the VRM dashboard.
The error can be reproduced.
The error shows up in the sum of the "From Grid" data field in the dashboard when a period greater than 48 hours is selected. If the selection is smaller than 48 hours, the chart is displayed based on hours. If you select more than 48 hours, the diagram is displayed on a daily basis.
I use a MultiPlus-II and EM24 Energymeter.
Example
< 48 hours - From Grid: 5.1kWh (5.1 is correct)
The same range < 48 h - also From Grid, but 2 hours later: 5.1kWh (5.1 is correct)
now - the selected period 49 h - From Grid now 7.4 kWh - this is wrong (5.1 is correct)
Where does the difference of 2.3 kWh come from? The error can be reproduced with all days.
P.S.: I am totally excited about Victron Energy's products. :-)