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Mark Mikofski
11:09 AM
Maintaining Open Source in the Age of Generative AI: Recommendations for Maintainers and Contributors
Scikit learn maintainers on AI in open-source: https://blog.probabl.ai/maintaining-open-source-age-of
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Maintaining Open Source in the Age of Generative AI: Recommendations for Maintainers and Contributors
Scikit learn maintainers on AI in open-source: https://blog.probabl.ai/maintaining-open-source-age-of
11:09 AM
Mohammed Muien
Feb 24
GSoC 2026 Applicant – Interested in Contributing to pvlib
My name is Muien, and I'm a student planning to apply for GSoC 2026 with interest in contributing
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GSoC 2026 Applicant – Interested in Contributing to pvlib
My name is Muien, and I'm a student planning to apply for GSoC 2026 with interest in contributing
Feb 24
Sofia Moroni
, …
Mehimmedetsi Boudjemaa
6
Feb 20
PVlib for Solar estimate
Open-Meteo likely overestimates winter GHI in Northern Italy's Po Valley due to frequent fog,
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PVlib for Solar estimate
Open-Meteo likely overestimates winter GHI in Northern Italy's Po Valley due to frequent fog,
Feb 20
Syed Muhammad qasim
,
Adam R. Jensen
2
Feb 18
Introduction - Interested in GSoC 2026 Example Gallery Project
Hi Syed Thank you for your interest in GSoC with pvlib. As our GSoC page mentions, we are unlikely to
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Introduction - Interested in GSoC 2026 Example Gallery Project
Hi Syed Thank you for your interest in GSoC with pvlib. As our GSoC page mentions, we are unlikely to
Feb 18
Mark Campanelli
,
Will Hobbs
2
Feb 12
SunEye-360 sensor integration?
(a few years later...) Hi Mark, I've just started experimenting with something close to this. For
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SunEye-360 sensor integration?
(a few years later...) Hi Mark, I've just started experimenting with something close to this. For
Feb 12
Will Hobbs
2
Feb 10
Estimating GHI or DNI from DHI or diffuse component of POA?
Thanks, Adam and Anton. That's what I figured. At least it's good to know I was not missing
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Estimating GHI or DNI from DHI or diffuse component of POA?
Thanks, Adam and Anton. That's what I figured. At least it's good to know I was not missing
Feb 10
David Lowrimore
, …
Will Hobbs
10
Feb 10
Inaccurate model with overproduction
I glanced at the boolean 8760, and I think your measured power observes daylight saving time and your
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Inaccurate model with overproduction
I glanced at the boolean 8760, and I think your measured power observes daylight saving time and your
Feb 10
Will Hobbs
,
cwh...@sandia.gov
5
Feb 1
Best way to flag times during backtracking?
I created an issue: https://github.com/pvlib/pvlib-python/issues/2672. And, as Adam Jensen pointed
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Best way to flag times during backtracking?
I created an issue: https://github.com/pvlib/pvlib-python/issues/2672. And, as Adam Jensen pointed
Feb 1
kevina...@gmail.com
Jan 17
[ANN] pvlib v0.14.0
Dear pvlib community, The maintainers are pleased to announce the v0.14.0 release of pvlib python.
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[ANN] pvlib v0.14.0
Dear pvlib community, The maintainers are pleased to announce the v0.14.0 release of pvlib python.
Jan 17
kevina...@gmail.com
, …
cwh...@sandia.gov
3
12/23/25
[ANN] pvlib v0.13.1
It could be applied to either, if you think of GHI as POA at a tilt of 0. Mismatch factor models are
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[ANN] pvlib v0.13.1
It could be applied to either, if you think of GHI as POA at a tilt of 0. Mismatch factor models are
12/23/25
Aakash Singh
,
Aalekh Roy
3
12/12/25
How to remove pvlib deprecation warnings
Hi Aalekh, Thanks a lot for your advice! I built the application off older pvlib sample code so that
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How to remove pvlib deprecation warnings
Hi Aalekh, Thanks a lot for your advice! I built the application off older pvlib sample code so that
12/12/25
Mark Mikofski
10/31/25
Fwd: See what's new with NumFOCUS this month: October 2025 edition! 🎉
FYI: PyData meetups in Seattle & Boston From: NumFOCUS <in...@numfocus.org> Date: October 30
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Fwd: See what's new with NumFOCUS this month: October 2025 edition! 🎉
FYI: PyData meetups in Seattle & Boston From: NumFOCUS <in...@numfocus.org> Date: October 30
10/31/25
Mark Mikofski
10/31/25
Fwd: [Python-announce] Call for Participation: Python devroom @ FOSDEM 2026
FYI: Python participating at https://fosdem.org/2026/ in Brussels. From: Marc-Andre Lemburg <mal@
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Fwd: [Python-announce] Call for Participation: Python devroom @ FOSDEM 2026
FYI: Python participating at https://fosdem.org/2026/ in Brussels. From: Marc-Andre Lemburg <mal@
10/31/25
Mark Campanelli
10/23/25
Unique solutions to SDE with only Isc, Pmp, and Voc points?
Hello world, I have reviewed at least one paper that claims to solve for the 5 parameters of single-
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Unique solutions to SDE with only Isc, Pmp, and Voc points?
Hello world, I have reviewed at least one paper that claims to solve for the 5 parameters of single-
10/23/25
P. C.
, …
cwh...@sandia.gov
10
10/6/25
Help with Tracking Misalignment for One Axis
Additional approach of Implementing Tracking Errors in Single-Axis Solar Tracking Systems, The
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Help with Tracking Misalignment for One Axis
Additional approach of Implementing Tracking Errors in Single-Axis Solar Tracking Systems, The
10/6/25
Fabio Iozzino
,
Will Hobbs
2
10/2/25
Beginner's Query: Modeling Mutual Shading and Ground Radiation in pvlib-python
For row-to-row shading, here are a few resources: https://pvlib-python.readthedocs.io/en/stable/
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Beginner's Query: Modeling Mutual Shading and Ground Radiation in pvlib-python
For row-to-row shading, here are a few resources: https://pvlib-python.readthedocs.io/en/stable/
10/2/25
Mark Mikofski
, …
Anton Frisk
3
10/1/25
Welcome — PV textbook
Hi! New here. Excellent book and problems page. Saw a bunch of problems about solar in space, eg.
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Welcome — PV textbook
Hi! New here. Excellent book and problems page. Saw a bunch of problems about solar in space, eg.
10/1/25
Dharik Mallapragada
, …
Will Hobbs
8
8/22/25
Modeling PV system - defining system size and DC output NaN values
Angelos, These are all valid reasons to keep NaNs. I think that solar position data could also be
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Modeling PV system - defining system size and DC output NaN values
Angelos, These are all valid reasons to keep NaNs. I think that solar position data could also be
8/22/25
Will Hobbs
,
Anton Driesse
2
8/20/25
1984 JPL/NASA/DOE report, Summary of Photovoltaic System Performance Models
Thanks, Will. There are many interesting old JPL and other reports from that era. The "models
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1984 JPL/NASA/DOE report, Summary of Photovoltaic System Performance Models
Thanks, Will. There are many interesting old JPL and other reports from that era. The "models
8/20/25
Will Hobbs
, …
Anton Driesse
12
8/13/25
Simple models for nonlinear relationship between irradiance and DC power
Hi Will, Since you mention the ADR model: it has a temperature coefficient that doesn't have the
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Simple models for nonlinear relationship between irradiance and DC power
Hi Will, Since you mention the ADR model: it has a temperature coefficient that doesn't have the
8/13/25
roshni agrawal
, …
Echedey Luis Álvarez
5
7/29/25
Perez model in Infinite Sheds
Hey Roshni! It's good to hear you want to get involved :) I suggest you start by checking our
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Perez model in Infinite Sheds
Hey Roshni! It's good to hear you want to get involved :) I suggest you start by checking our
7/29/25
Loc Nguyen
, …
Will Hobbs
3
7/29/25
Single-axis tracker modeling: True tracking outperforming backtracking despite shading - Expected behavior?
You will need to account for the non-linear losses from partial shade in crystalline silicon modules.
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Single-axis tracker modeling: True tracking outperforming backtracking despite shading - Expected behavior?
You will need to account for the non-linear losses from partial shade in crystalline silicon modules.
7/29/25
Mukiibi Rogers
,
cwh...@sandia.gov
2
7/17/25
Inquiry About pvlib Group Meetings for Merges and Pull Request Follow-Ups
Hello Mukiibi, The pvlib doesn't currently hold meetings. We prefer that discussions about
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Inquiry About pvlib Group Meetings for Merges and Pull Request Follow-Ups
Hello Mukiibi, The pvlib doesn't currently hold meetings. We prefer that discussions about
7/17/25
Raghav Prabanth
,
cwh...@sandia.gov
2
7/15/25
Doubt Clarification
Hi Raghav, There is a function pvlib.iotools.read_panond that will read either a PAN or OND file and
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Doubt Clarification
Hi Raghav, There is a function pvlib.iotools.read_panond that will read either a PAN or OND file and
7/15/25
Gemini
,
Adam R. Jensen
2
7/4/25
Soda-Pro is not reachable
1. Specifying time_ref='UT' will give you UTC 2. The get_cams function retrieves the data
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Soda-Pro is not reachable
1. Specifying time_ref='UT' will give you UTC 2. The get_cams function retrieves the data
7/4/25
roshni agrawal
, …
N Dabouz
7
7/1/25
Using CECMod
Thanks Cliff. I was using v0.11 and it explains the issue well. v0.13 uses 'no_loss' spectral
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Using CECMod
Thanks Cliff. I was using v0.11 and it explains the issue well. v0.13 uses 'no_loss' spectral
7/1/25
Mark Mikofski
6/27/25
Fwd: [psf-members-ann] 2025 PSF Board Election Schedule & Info
FYI: Python software foundation (psf) 2025 board member election info… From: Marie Nordin <marie@
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Fwd: [psf-members-ann] 2025 PSF Board Election Schedule & Info
FYI: Python software foundation (psf) 2025 board member election info… From: Marie Nordin <marie@
6/27/25
Ludivine Chabaud
,
cwh...@sandia.gov
2
6/24/25
Assistance with DMEG Module Parameters and .PAN File in PVLIB
Hi Ludivine, 1. The pvlib function reads the file into the python workspace but doesn't interpret
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Assistance with DMEG Module Parameters and .PAN File in PVLIB
Hi Ludivine, 1. The pvlib function reads the file into the python workspace but doesn't interpret
6/24/25
Mark Mikofski
6/20/25
interactive graph of Python packages
An interactive graph of Python packages https://fi-le.net/pypi/
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interactive graph of Python packages
An interactive graph of Python packages https://fi-le.net/pypi/
6/20/25
Helix
,
cwh...@sandia.gov
2
6/20/25
Capacity Factor
The introduction tutorial shows how to model power from a PV system. https://pvlib-python.readthedocs
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Capacity Factor
The introduction tutorial shows how to model power from a PV system. https://pvlib-python.readthedocs
6/20/25