Yes - when the power output measurements are initially created, they may not be associated with the historian.
We fixed this on May 20 last year: https://github.com/GridProtectionAlliance/gsf/commit/d01e4267
But the last openPDC release was on May 7 last year and we haven’t released version 2.8 yet.
I suggest using the nightly build:
This will have the fix that will archive power measurements automatically.
Alternatively, you can manually set power output measurements to be associated with historian by opening the manager application, navigating to “Metadata > Measurements”, finding the output, then selecting the desired target historian from the list, then clicking save.
Note that even after making sure measurements are archived, the “Graph Measurements Screen” in the manager may not trend the measurements because they are marked as “calculated” and it currently only has scales for known quantities. The openHistorian web UI does not have this restriction.