v0.10.4 (March 19, 2024)

Enhancements

Added the Huld PV model used by PVGIS (:pull:`1940`)
Added a method to fit the Huld PV model (:pull:`1979`)
Add :py:func:`~pvlib.iotools.get_solargis` for retrieving Solargis irradiance data. (:pull:`1969`)
Added function :py:func:`pvlib.shading.projected_solar_zenith_angle`, a common calculation in shading and tracking. (:issue:`1734`, :pull:`1904`)
Added :py:func:`~pvlib.iotools.get_solrad` for fetching irradiance data from the SOLRAD ground station network. (:pull:`1967`)
Added metadata parsing to :py:func:`~pvlib.iotools.read_solrad` to follow the standard iotools convention of returning a tuple of (data, meta). Previously the function only returned a dataframe. (:pull:`1968`)

Fixed an error in solar position calculations when using :py:class:`pandas.DatetimeIndex` with unit other than 'ns' (:issue:`1932`). The following functions were affected:
- :py:class:`~pvlib.modelchain.ModelChain` and :py:func:`~pvlib.solarposition.get_solarposition` with the nrel_numpy and nrel_numba methods
- :py:func:`~pvlib.solarposition.spa_python`
- :py:func:`~pvlib.solarposition.sun_rise_set_transit_spa`
- :py:func:`~pvlib.solarposition.nrel_earthsun_distance`
- :py:func:`~pvlib.solarposition.hour_angle`
- :py:func:`~pvlib.solarposition.sun_rise_set_transit_geometric`
:py:class:`~pvlib.modelchain.ModelChain` now raises a more useful error when temperature_model_parameters are specified on the passed system instead of on its arrays. (:issue:`1759`).
:py:func:`pvlib.irradiance.ghi_from_poa_driesse_2023` now correctly makes use of the xtol argument. Previously, it was ignored. (:issue:`1970`, :pull:`1971`)
Fixed incorrect unit conversion of precipitable water used for the Solcast iotools functions. (:pull:`1969`)
:py:class:`~pvlib.modelchain.ModelChain.infer_temperature_model` now raises a more useful error when the temperature model cannot be inferred (:issue:`1946`)
The default URL for retrieving irradiance data from the SRML network was updated in :py:func:`~pvlib.iotools.get_srml` (:pull:`1957`, :issue:`1922`)

Improved references and description for :py:func:`~pvlib.irradiance.get_ground_diffuse`. (:pull:`1883`, :pull:`1953`)
Fixed broken URLs in various places. (:pull:`1957`, :pull:`1960`)
Added a gallery example with a model for OEDI system 9068. (:pull:`1985`)