question

Unless you have a shunt measuring the dc loads, then it's a calculated value and can be off.

I have no shunt on the DC loads, only on the entire battery bank.

Looking at the time plot of DC and AC loads, the big DC loads mostly line up with AC activity, supporting a calculation/sample error.

What AC loads do you have?

Just wondering if the values on the dashboard are all instantaneous or affected by collection delays.

The continuous chart does show good correlation between AC peaks and DC loads.

I notice the inverter is in power assist mode. I think we are seeing some timing sampling anomalies giving those results because the input current doesn’t suggest the need for power assist.

Right now we are at a dock where I have limited the AC current to 8A (@110V) and on top of that the power comes and goes. Even for medium loads the inverter is either assisting or providing it all.

So yes, it is possible that this comes from instantaneous samples that are not perfectly correlated and/or not smoothed, so when VRM puts together the DC load from calculations, you get spikes that are not real.

Is there a setting that improves on this?

Yes, on the CerboGX under the VRM portal heading is a variable called “log interval”. I think in the default condition it is 15 minutes but that can be reduced at the expense of data use.

I think a shorter log interval will make a strange reading go away quicker, as in what is displayed on vrm, but i think the fundamental challenge here is how to sample all system data at the “same” time so it is consistent.