Feed in from AC-in is not calculated / shown

Q&A and troubleshooting
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1

Hi All,

I have a bit of a weird situation here.
I have a 3-phase system with 3x Multi RS and a SolarEdge SE17K on AC-Out.
My full house loads are also on AC-Out. All is working fine.

However I am also building victron systems for customers, both 1 phase and 3 phase systems.
Before installing these systems at the customer locations, I hook up the entire system to a 3 phase 32A CEE connector on the AC-in side of my own Victron system.
From here I test the customers installation on full load, like charging batteries at 11kW but also feeding back into the grid.

The problem (or missing info rather) what I am having is that, whenever I am charging from the AC-in side, the consumption is correctly displayed on my main system as “AC-Loads”. But once I start feeding back into the grid from the customers victron setup, the AC-Loads is not showing a “negative” load.

Is there a way to have the AC-Loads also show negative numbers?

The combined load at the grid meter (Victrom VM75 meter) does show the correct numbers

The first screenshot below shows the situation of both my own system and the customers system in “idle” mode:

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The second screenshot shows when both systems are feeding back into the grid. Here you can see that the AC-Loads is not showing any negative loads.

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This is the console view of the customers victron setup:

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Now when I change from feeding into the grid to charging from grid (both my own system and the customers system), this time the total amount displayed does in fact add up, as the AC Loads is now displaying the correct amount:

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So long story short: how can I make sure energy feeding into AC-in is displayed correctly? I might be able to use a separate Victron VM75 meter for the customers installation, but I don’t know which role I should give the VM meter as PV only works one way, so does Generator.

2

I think loads are never negative in the Victron system. A way to do this is make a virtual PV node on the AC_in side and in NodeRED, whenever the AC_in load is below zero for a phase, push the consumption to the virtual PV node (where it becomes production)

3

Fur AC energy sources please add an energy meter with role PV inverter or even better genset.

4

But it’s only 50% energy source, the other 50% it is an energy load, therefore the PV role would not work, and I highly doubt a genset role would work either, a generator does not consume energy