Thanks for the insight. I've already found pvlib-python, good to know it can be advised to use by professionals, too. I'd be fine using the theoretical max. irradiance, one of my aims is actually pre-drawing an enveloping curve representing the possible max. power output. For real time curves I can use the solar sensor (horizontal irradiance) of my weather station for some additional insight.
On Saturday, April 27, 2019 at 4:26:03 AM UTC+2, [email protected] wrote: > > I work in the PV industry, though I don't have much experience with weewx > yet, and limited experience with python. That said, the calculation you are > looking for is called a "transposition", and you are transposing from GHI > (Global Horizontal Irradiance) from your horizontal sensor to what is > called POA (Plane of Array) irradiance. That may help a bit with your > searching. > > Sandia's PV Array Performance Model is a set of equations that can > describe nearly every part of a PV system's behavior: > https://pvpmc.sandia.gov/modeling-steps/1-weather-design-inputs/plane-of-array-poa-irradiance/ > > It is partially (completely?) implemented in Python in the pvlib library: > https://pvlib-python.readthedocs.io/en/stable/ > > I haven't used the library, though I do use a lot of tools that include > calculations from the Sandia PVAPM. > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
