Real-world voltage and reported dashboard voltages not matching

Q&A and troubleshooting
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1

Good evening all.

Have a 3P system here we are troubleshooting and noticed something worrying:

3 x Quattro’s - Firmware version :552
1 x AC coupled PV Fronius

  1. The advanced dashboard data is not reflecting what is actually happening. For example: on AC1 OUT the system mostly sits at 205V for whatever reason we are still trying ot figure out why. The Remote Console and multimeter measurement are spot on, but advanced dashboard claims voltage never went that low:

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  1. Same is true for frequency. Here we have it go up to 53Hz due to AC coupled PV, but dashboard says that never happened.

Am I missing something here or is this in fact a UI bug?

Full video here: https://youtube.com/shorts/NcftuuAkZI8?si=vkcMziIkOHI6QMms

2

Nobody from Victron willing to comment?

@guystewart

3

@dansz
This is not an official ask victron forum.

That being said.
From what it looks like, the inverters are switching between inverterting and connecting or synchronization to poor qnd unstable grid voltages.
You can see the switches also in the frequency changes as you move between off grid and on grid with throttling using frequency and modbus.

Of course your console is real time but the vrm has log distance of 60seconds? If the data points are such that every time it reports its at that level, then the graph will be different to realtime.

4

Thanks for the links! I will sleep on them going forward.

Allow me to disagree on second topic. As an engineer it is just not good enough for a premium product. Even if the log distance is 60s or more it should still catch at least one occurrence along a day this continously happens. I’m not going to sit there looking at the remote console all day and want reliable historical data.