1984 JPL/NASA/DOE report, Summary of Photovoltaic System Performance Models

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Will Hobbs

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Aug 18, 2025, 12:36:44 PMAug 18
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This is a cool report for folks that have not seen it: https://ntrs.nasa.gov/citations/19840020151, https://ntrs.nasa.gov/api/citations/19840020151/downloads/19840020151.pdf

It summarizes models that were available from JPL, Sandia, EPRI, University of Wisconsin, ASU, and MIT (and references models from SERI/NREL that were not included). 

Some of my takeaways after skimming the report:
- there were more models than I realized
- models were more sophisticated than I would have guessed
- it was clear in 1984 (1982, really), that hourly time steps might not be good enough when "the data are available and where highly variable insolation and/or load conditions are envisioned"

Will

Anton Driesse

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Aug 20, 2025, 5:33:46 AMAug 20
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Thanks, Will.  There are many interesting old JPL and other reports from that era. 

The "models" here are all software programs (tools) that implement various combinations of component models.  While many of the component models seem quite simple, some of the software capabilities seem quite advanced to me.  It would make an interesting paper/presentation to compare this to today's tools (40+ years later!).  We essentially still using component models known back then (single diode IV, module temperature), but perhaps there is some forgotten bit of knowledge in there that could still help us?

Anton

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