question

Hi @dognose,

Yes, I have Grid Metering set to " External Meter" in ESS settings and the Fronius is assigned to its correct position AC output. I don't think the Fronius's position is affecting it because the loads are graphing incorrectly at night time. To me it almost seems like a firmware bug in Victron's reporting.

@nickb

I've also noted some wrong numbers with the graphs.

Just right now:
- Last hour is a steady 6000 Watts according to my own monitoring, identical to the fronius-portal as well (direct consumption + ESS Charge + Electric Water-Heater)


VRM however concludes that the consumption was about 8 kWh and Solar sums up to 14 kWh, where there have apparently been a Peak-Power of 11 - 12 kW today.



So, there indeed seems to be an issue with VRM at the moment? Can't explain the differences, tho, especially why "solar" is off by about 16%. Data used comes from the same Smart-Meter, so should basically be equal.

Update: Even the VRM PV-Yield of solar clearly shows that the PV Power ranged between 10 and 12 kW for the time 11-12 - how can that be a sum of 14,08 kWh?



To me, it seems as these values are accidently considered "Currencies" and the VAT of 19% is added :P

Edit 2:
Also the "Total Consumption" widget supports that there have been ~5 kWh of Consumption (+500W invisible Bat-Charge), not 8 kWh as the Installation-Data-Graph calculates...

I've now had some time to look into the numbers from today and figured out the following:

- VRM is considering 100% of my Solar-Production as "Direct Use". Note the two numbers 7.92 kWh and 10.42 kWh for the next hour:



When shown in System Overview, these figures become "Consumption", and VRM seems to "add" the actual consumption (as mentioned ~ 6 kWh during these hours) on top of that to engineer the new "Solar" Value:

7.92 kWh + ~6 kWh becomes 14.08 kWh Solar.
10.42 kWh + ~ 6 kWh becomes ~ 16 kWh Solar.

Why is VRM considering 100% of Solar-Production as "Direct Use"-Consumption?
Live-Data is showing Feed-In Values of -5000 to -6000 just fine...?

@nickb Can you check, if this is the same Issue for you?

Ok, I figured out, what is going wrong (in my Case):

I'm using a Fronius Hybrid with Battery. To Visualize the Battery in VRM, a custom script is used that simulates a BMS and a Solar-Inverter.

Victron however is detecting Fronius-Solar-Inverters automatically. So I've set the found "Hybrid" to "Display: No" in the native PV-Inverter Menu.

However, that seems to only exclude the PV-Inverter to be excluded from the Live-View, NOT from VRMs Installation-Data-Calculation. Thus, my Hybrid Inverter is currently counted twice for historical data: One time through the custom implementation and one time through the Victron implementation.

So, that fraction of "PV-Production" is not visible as Feed-In (apparently, because it does not exist) - So VRM concludes, that there is additional consumption equal to the Power of 1 times the hybrids inverter output.

Now it would be super useful to have the feature to remove detected PV Inverters. Has been promised to be ready in a few months end of 2022 ;-)

I think our situation differ because I'm not using a hybrid inverter with the Victron. The Fronius AC coupled inverter on my system is just grid tie and the Victron's are the only battery chargers.

I have attached some graphs below, to me it looks as simple at the graph isn't pulling data from the correct widget. Because the realtime data is reading correctly I assume the system is configured correctly.

Energy meter data - shows correct site loads

Overview graph - not showing consumption correctly

Multiplus II Output - seems to be where the the graph is pulling it's data