Hello,
We're having confusion about version numbers in the different wrappers for PVWatts. Are the version numbers for PySAM and the PVWatts API correlated or not? For example, it appears the PVWatts API v6 is most current, but PySAM has v5, v7, and v8, but no v6. Is PySAM v8 calling the same underlying version of PVWatts as the PVWatts API v6?
Here's the background and motivation for this question: we recently did some comparisons of calling TMY data through the PVWatts API to running either TMY or AMY data through PySAM, after downloading the weather data directly from the NSRDB. So, we're comparing using the PVWatts API here:
developer.nrel.gov/docs/solar/pvwatts/v6/
to the pipeline shown here:
Python Examples API | NREL: Developer Network
The Python example calls PySAM v5, which seems to be out of date, and we were concerned by consistent differences in PV power magnitude the PVWatts API v6 and the PySAM outputs. Switching to PySAM v8 appears to have resolved some of those discrepancies. Can you speak to this, and verify what versions to use for consistency between the two pipelines?
Thank you!