For my MP2 ESS I try to read the grid feed in power. Assume everything is power and not apparent power. Venus receives ABB grid meter by RS485 over USB. As I could not find any prepared nodes or variable for this, I used the orange Victron custom nodes to access dbus. 2 different paths give 2 similar values but are different to the ABB meter (and a calibrated Ziehl EFR relais). Probably first column is only available for my system. Second column seems same and should be preferred for flow use on other Victron ESS. Small differences are accepted for different scan times, rounding or average calculations but deviations to ABB & Ziehl are 2-300 Watt what requires better understanding.
Obviously some values are calculated and not measured. Indeed, AC loads L3 has no connected load and seems only calculated inverter loss. L2 has big load, L1 has small load what possibly affects the values for any calculated grid feed in? Its suspicious that L2 displays much lower value of AC out load (1850:468) what might be a typo what happened at copy of the source lines. Is it possible to see the Victron node javascript source?
First two orange colums have approximately same values but seems not what the calibrated ABB comunicates by RS485. Is there any node / variable to access what calibrated ABB meter supplies to dbus ?
Here is the test flow. eHZ 18 is my ABB counter probably not available for other systems.
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Edit: Meantime I found the gridmeter node. Total Power is identical with self accumulated dbus values. Have to investigate for the 200 Watt diffrence to Ziehl. As ABB & Ziehl instruments are 50m away, I only compared the kWh before. Difference of Out L2 is another thing to check.
Again, reading from dbus and MP2 node shows strong difference for L2 only:
