The “AC-Load” value is not calculated correctly

[muellcy]

I have expanded my PV system and included a Cerbo-SGX. So fare everything is working fine . There is just one thing that is not shown correctly! The “AC-Load" value (in Screenshot 628 W) is always more or less double of what the Hoymiles HM 1500 feeds into the grid.
It adds the "-" values from Phase L2 to the AC-Load.
This is only happen when I set the "servicename" to "inverter".
If I change the "servicename" to "pvinverter" then it adds to the "solar total" value the inverter load and is showing a additional PV-Inverter box.

My PV-System consists of 2 Victron mppt trackers, a Daly BMS with LifePo4 cells.
Furthermore, a "Hoymiles HM1500 inverter with a opendtu" and a "Shelly Pro 3EM" and as well as already mentioned the Cerbo-sgx.
The Hoymiles inverter is connected to Phase L2.

On the cerbo I have manually installed the following services:
My own "Phyton NullEinspeise script"
dbus-opendtu
dbus-shelly-pro-3em-smartmeter
dbus-serialbattery

Does anyone has an idea how to solve the problem?
I think it has to do with the "servicename" but I am not sure.
I tried all 3 AC-Positions (0-2) values. No one made a difference, nor was solving the issue as long as the "servicename" was set to "inverter".
If the "servicename" is set to "pvinverter" the "AC-Position" must set to "0" otherwise the "AC-Load" values are also incorrect.
But in this mode as said the total solar" value is wrong as the inverter load is added to the mppt-Load.

[muellcy]

AC-Position=0 / Servicename=inverter

AC-Position=0 / Servicename=pvinverter

currently active config.

[henne49]

sorry I do not understand the problem, what device is doing what? and which victron device do you use? Also we only write to dbus and then vrm is showing data. what do you see on venus os in the overview. what version of venus are you using on your cerbo gx?

[muellcy]

cerbo-sgx Software Version: 2.94.
opendtu Software Version: V24.8.1
Problem 1: The Load of the Hoymiles HM1500 inverter is added to the AC-Load if the "servicename" is set to "inverter".
Problem 2: The Load of the Hoymiles HM1500 inverter is added to "Total Solar" if "servicename" is set to "pvinverter". See last screenshot of the post before.
Both are not correct!
Note: Is "servicename" is set to "pvinverter" the the AC-Load value is right.
The overview is also showing the same problem. The inverter-load is added to the AC-Load. See screenshot 1
The screenshot 2 are showing the used victron devices. The 2 victron mppt-Tracker and the victron Battery protect are updated to the latest available firmware version.

Screenshot 1 (servicename is set to inverter)

Screenshot 2

Any hint or help to solve the issue

is very appreciated.
Many thanks in adavance

[henne49]

well it seems you want to use the Hoymiles as Inverter not a Victron device, as noted in #42 (comment), this is not possible

[muellcy]

Yes, that is exactly what I try to achive. I do not have an victron inverter in my installation. Only the Hoymiles HM1500 which is running as an ac-inverter. I found an emulation for victron multiplus inverters. But this implementaion was also not solving the problem. It is a shame that there is not solution available. Anyhow thanks for your clarification on this issue :-(

[muellcy]

I finally got it working by adding Multiplus emulation to my Cerbo. I don't know why it didn't work the first time.
Required changes:
"Settings" "ESS" "Grid Metering" set to -> "external meter".
"Settings" "ESS" "Inverter AC output in use" - >must set to off

Change if requried: The phase where the inverter is connected to. Default is L1
ssh login to cerbo
nano /data/etc/dbus-multiplus-emulator/dbus-multiplus-emulator.py
go to "User changeable values"
phase used = ["L1"] could be L1, L2, L3 or ["L1", "L2", "L3] if you have a 3 phase inverter.
Save the changes with Ctrl x

Restart service
/data/etc/dbus-multiplus-emulator/restart.sh

The Multiplus emulation are showing a few other nice things. For example, it is now additionaly displayed whether the MPPT trackers are in “Bulk”, “Absorption” or “Float” mode. The Hz, current and voltage of each phase are also displayed. I am completely satisfied now.

https://github.com/mr-manuel/venus-os_dbus-multiplus-emulator

[0x7878]

Thank you for sharing this with the community :-)