From d1c328a9fca64678312f8f170dba16dae492b260 Mon Sep 17 00:00:00 2001
From: Johann Lo <65318981+JoLo90@users.noreply.github.com>
Date: Fri, 29 May 2026 11:27:30 +0200
Subject: [PATCH 1/4] refactor: deprecate dead code

---
 docs/sphinx/source/whatsnew/v0.15.2.rst |  9 ++++++++
 pvlib/iotools/bsrn.py                   |  2 +-
 pvlib/iotools/epw.py                    |  2 +-
 pvlib/iotools/sodapro.py                |  2 +-
 pvlib/irradiance.py                     | 21 +++++++++++++----
 pvlib/modelchain.py                     | 13 ++++++++++-
 pvlib/tracking.py                       |  2 +-
 tests/test_clearsky.py                  | 14 ++++++++++--
 tests/test_irradiance.py                |  9 ++++++++
 tests/test_modelchain.py                | 30 +++++++++++++++++++++++--
 10 files changed, 91 insertions(+), 13 deletions(-)

diff --git a/docs/sphinx/source/whatsnew/v0.15.2.rst b/docs/sphinx/source/whatsnew/v0.15.2.rst
index 97383a5723..2841cf8b4c 100644
--- a/docs/sphinx/source/whatsnew/v0.15.2.rst
+++ b/docs/sphinx/source/whatsnew/v0.15.2.rst
@@ -13,6 +13,15 @@ Deprecations
   :py:func:`~pvlib.irradiance.ghi_from_poa_driesse_2024`. The year now reflects
   the publication date. The old name will be removed in v0.17.0.
   (:issue:`2774`, :pull:`2777`)
+* The function :py:func:`pvlib.clearsky._is_leap_year` is deprecated and will be
+  removed in v0.17.0. Use :py:func:`pandas.Timestamp.is_leap_year` instead.
+  (:issue: `2764`, :pull:`2766`)
+* The function :py:func:`pvlib.irradiance._liujordan` is deprecated and will be
+  removed in v0.17.0. (:issue: `2764`, :pull:`2766`)
+* The function :py:func:`pvlib.modelchain.get_orientation` is deprecated and will
+  be removed in v0.17.0. (:issue: `2764`, :pull:`2766`)
+* The method :py:meth:`pvlib.modelchain.ModelChain._prep_inputs_tracking` is
+  deprecated and will be removed in v0.17.0. (:issue: `2764`, :pull:`2766`)
 
 
 Bug fixes
diff --git a/pvlib/iotools/bsrn.py b/pvlib/iotools/bsrn.py
index fff3f72614..9e6c222314 100644
--- a/pvlib/iotools/bsrn.py
+++ b/pvlib/iotools/bsrn.py
@@ -464,5 +464,5 @@ def read_bsrn(filename, logical_records=('0100',)):
     return content
 
 
-parse_bsrn = deprecated(since="0.13.0", name="parse_bsrn",
+parse_bsrn = deprecated(since="0.13.0",  removal="0.17.0", name="parse_bsrn",
                         alternative="read_bsrn")(read_bsrn)
diff --git a/pvlib/iotools/epw.py b/pvlib/iotools/epw.py
index 4355e7619f..561419fc00 100644
--- a/pvlib/iotools/epw.py
+++ b/pvlib/iotools/epw.py
@@ -311,5 +311,5 @@ def _parse_epw(csvdata, coerce_year=None):
     return data, meta
 
 
-parse_epw = deprecated(since="0.13.0", name="parse_epw",
+parse_epw = deprecated(since="0.13.0", removal="0.17.0", name="parse_epw",
                        alternative="read_epw")(read_epw)
diff --git a/pvlib/iotools/sodapro.py b/pvlib/iotools/sodapro.py
index be11dbf260..81212d8112 100644
--- a/pvlib/iotools/sodapro.py
+++ b/pvlib/iotools/sodapro.py
@@ -359,5 +359,5 @@ def read_cams(filename, integrated=False, label=None, map_variables=True):
     return data, metadata
 
 
-parse_cams = deprecated(since="0.13.0", name="parse_cams",
+parse_cams = deprecated(since="0.13.0", removal="0.17.0", name="parse_cams",
                         alternative="read_cams")(read_cams)
diff --git a/pvlib/irradiance.py b/pvlib/irradiance.py
index 677cdba60f..b7a1378590 100644
--- a/pvlib/irradiance.py
+++ b/pvlib/irradiance.py
@@ -18,6 +18,7 @@
 
 from pvlib._deprecation import pvlibDeprecationWarning, deprecated
 import warnings
+from pvlib._deprecation import deprecated
 
 
 # Deprecation warning based on https://peps.python.org/pep-0562/
@@ -3234,7 +3235,14 @@ def campbell_norman(zenith, transmittance, pressure=101325.0,
     return irrads
 
 
-def _liujordan(zenith, transmittance, airmass, dni_extra=1367.0):
+@deprecated(
+    since="0.15.2",
+    removal="0.17.0",
+    name="_liujordan",
+    addendum=None,
+)
+def _liujordan(zenith: pd.Series, transmittance: float,
+               airmass: float, dni_extra=1367.0) -> pd.DataFrame:
     '''
     Determine DNI, DHI, GHI from extraterrestrial flux, transmittance,
     and optical air mass number.
@@ -3253,11 +3261,11 @@ def _liujordan(zenith, transmittance, airmass, dni_extra=1367.0):
     transmittance: float
         Atmospheric transmittance between 0 and 1.
 
-    airmass: numeric
-        Optical air mass. [unitless]
+    airmass: float
+        Absolute airmass.
 
     dni_extra: float, default 1367.0
-        Direct irradiance incident at the top of the atmosphere.
+        Direct irradiance incident at the top of the atmosphere. [W/m²]
 
     Returns
     -------
@@ -3273,6 +3281,11 @@ def _liujordan(zenith, transmittance, airmass, dni_extra=1367.0):
     .. [2] Liu, B. Y., R. C. Jordan, (1960). "The interrelationship and
        characteristic distribution of direct, diffuse, and total solar
        radiation".  Solar Energy 4:1-19
+
+    .. deprecated:: 0.15.2
+        The ``_liujordan`` function is deprecated and will be
+        removed in 0.17.0.
+        Use the ``liujordan`` function instead.
     '''
 
     tau = transmittance
diff --git a/pvlib/modelchain.py b/pvlib/modelchain.py
index cf7a5bf7e5..34f9f04600 100644
--- a/pvlib/modelchain.py
+++ b/pvlib/modelchain.py
@@ -63,7 +63,7 @@
 
 @deprecated(
     since="0.13.1",
-    removal="",
+    removal="0.17.0",
     name="pvlib.modelchain.get_orientation",
     alternative=None,
     addendum=None,
@@ -84,6 +84,10 @@ def get_orientation(strategy, **kwargs):
     Returns
     -------
     surface_tilt, surface_azimuth
+
+    .. deprecated:: 0.15.2
+        The ``get_orientation`` function is deprecated and will be removed
+        in 0.17.0.
     """
     if strategy == 'south_at_latitude_tilt':
         surface_azimuth = 180
@@ -1261,6 +1265,13 @@ def _prep_inputs_airmass(self):
             model=self.airmass_model)
         return self
 
+    @deprecated(
+        since="0.15.2",
+        removal="0.17.0",
+        name="Modelchain._prep_inputs_tracking",
+        alternative=None,
+        addendum=None,
+    )
     def _prep_inputs_tracking(self):
         """
         Calculate tracker position and AOI
diff --git a/pvlib/tracking.py b/pvlib/tracking.py
index 69c679ef79..e234887cd0 100644
--- a/pvlib/tracking.py
+++ b/pvlib/tracking.py
@@ -1,7 +1,7 @@
 import numpy as np
 import pandas as pd
 
-from pvlib.tools import cosd, sind, tand, acosd, asind
+from pvlib.tools import cosd, sind, tand, acosd
 from pvlib import irradiance
 from pvlib import shading
 from pvlib._deprecation import renamed_kwarg_warning
diff --git a/tests/test_clearsky.py b/tests/test_clearsky.py
index 638dfb0bc5..d55fd0cc1e 100644
--- a/tests/test_clearsky.py
+++ b/tests/test_clearsky.py
@@ -8,13 +8,15 @@
 
 import pytest
 from numpy.testing import assert_allclose
-from .conftest import assert_frame_equal, assert_series_equal
+from .conftest import (assert_frame_equal, assert_series_equal,
+                       fail_on_pvlib_version)
 
 from pvlib.location import Location
 from pvlib import clearsky
 from pvlib import solarposition
 from pvlib import atmosphere
 from pvlib import irradiance
+from pvlib._deprecation import pvlibDeprecationWarning
 
 from .conftest import TESTS_DATA_DIR
 
@@ -892,5 +894,13 @@ def test_bird():
     # XXX: testdata starts at 1am so noon is at index = 11
     np.allclose(
         [Eb3, Ebh3, Gh3, Dh3],
-        testdata2[['Direct Beam', 'Direct Hz', 'Global Hz', 'Dif Hz']].iloc[11],
+        testdata2[['Direct Beam', 'Direct Hz',
+                   'Global Hz', 'Dif Hz']].iloc[11],
         rtol=1e-3)
+
+
+@fail_on_pvlib_version('0.17.0')
+def test_is_leap_year_deprecation():
+    with pytest.warns(pvlibDeprecationWarning,
+                      match='will be removed in 0.17.0.'):
+        clearsky._is_leap_year(2020)
diff --git a/tests/test_irradiance.py b/tests/test_irradiance.py
index f5f1c7ebd6..ce1a711e3b 100644
--- a/tests/test_irradiance.py
+++ b/tests/test_irradiance.py
@@ -14,6 +14,7 @@
 from .conftest import (
     assert_frame_equal,
     assert_series_equal,
+    fail_on_pvlib_version,
     requires_ephem,
     requires_numba,
 )
@@ -1670,3 +1671,11 @@ def test_diffuse_par_spitters():
         0.99591, 0.99576, 0.99472, 0.99270, 0.99283, 0.99406, 0.99581, 0.99591,
     ])  # fmt: skip
     assert_allclose(result, expected, atol=1e-5)
+
+
+@fail_on_pvlib_version('0.17.0')
+def test_liujordan_deprecation():
+    zenith = pd.Series([45.0, 50.0, 55.0])
+    with pytest.warns(pvlibDeprecationWarning,
+                      match='will be removed in 0.17.0.'):
+        irradiance._liujordan(zenith, transmittance=0.7, airmass=1.5)
diff --git a/tests/test_modelchain.py b/tests/test_modelchain.py
index 6948e0f3bb..638ccf306e 100644
--- a/tests/test_modelchain.py
+++ b/tests/test_modelchain.py
@@ -1,4 +1,5 @@
 import sys
+from unittest.mock import MagicMock
 
 import numpy as np
 import pandas as pd
@@ -10,7 +11,8 @@
 
 from pvlib._deprecation import pvlibDeprecationWarning
 
-from .conftest import assert_series_equal, assert_frame_equal
+from .conftest import (assert_series_equal, assert_frame_equal,
+                       fail_on_pvlib_version)
 import pytest
 
 
@@ -1821,12 +1823,36 @@ def test_invalid_models(model, sapm_dc_snl_ac_system, location):
         ModelChain(sapm_dc_snl_ac_system, location, **kwargs)
 
 
+@fail_on_pvlib_version('0.17.0')
 def test_bad_get_orientation():
-    with pytest.warns(pvlibDeprecationWarning, match='will be removed soon'):
+    with pytest.warns(pvlibDeprecationWarning,
+                      match='will be removed in 0.17.0.'):
         with pytest.raises(ValueError):
             modelchain.get_orientation('bad value')
 
 
+@fail_on_pvlib_version('0.17.0')
+def test_get_orientation_deprecation():
+    with pytest.warns(pvlibDeprecationWarning,
+                      match='will be removed in 0.17.0.'):
+        surface_tilt, surface_azimuth = modelchain.get_orientation('flat')
+    assert surface_tilt == 0
+    assert surface_azimuth == 180
+
+
+@fail_on_pvlib_version('0.17.0')
+def test_prep_inputs_tracking_deprecation(sapm_dc_snl_ac_system, location):
+    mc = ModelChain(sapm_dc_snl_ac_system, location)
+    # Set up mock results and system attributes required by the method
+    mc.results = MagicMock()
+    mc.system.singleaxis = MagicMock()
+    mc.system.axis_tilt = 0.0
+    mc.system.axis_azimuth = 180.0
+    with pytest.warns(pvlibDeprecationWarning,
+                      match='will be removed in 0.17.0.'):
+        mc._prep_inputs_tracking()
+
+
 # tests for PVSystem with multiple Arrays
 def test_with_sapm_pvsystem_arrays(sapm_dc_snl_ac_system_Array, location,
                                    weather):

From 1402b0dee76c791d914bb9f903166f1c9e6edfde Mon Sep 17 00:00:00 2001
From: Johann Lo <65318981+JoLo90@users.noreply.github.com>
Date: Wed, 10 Jun 2026 09:09:50 +0200
Subject: [PATCH 2/4] fix: refactor doc comments and keep internal
 _prep_inputs_tracking

---
 docs/sphinx/source/whatsnew/v0.15.2.rst |  9 ---------
 pvlib/modelchain.py                     |  7 -------
 tests/test_modelchain.py                | 13 -------------
 3 files changed, 29 deletions(-)

diff --git a/docs/sphinx/source/whatsnew/v0.15.2.rst b/docs/sphinx/source/whatsnew/v0.15.2.rst
index 2841cf8b4c..97383a5723 100644
--- a/docs/sphinx/source/whatsnew/v0.15.2.rst
+++ b/docs/sphinx/source/whatsnew/v0.15.2.rst
@@ -13,15 +13,6 @@ Deprecations
   :py:func:`~pvlib.irradiance.ghi_from_poa_driesse_2024`. The year now reflects
   the publication date. The old name will be removed in v0.17.0.
   (:issue:`2774`, :pull:`2777`)
-* The function :py:func:`pvlib.clearsky._is_leap_year` is deprecated and will be
-  removed in v0.17.0. Use :py:func:`pandas.Timestamp.is_leap_year` instead.
-  (:issue: `2764`, :pull:`2766`)
-* The function :py:func:`pvlib.irradiance._liujordan` is deprecated and will be
-  removed in v0.17.0. (:issue: `2764`, :pull:`2766`)
-* The function :py:func:`pvlib.modelchain.get_orientation` is deprecated and will
-  be removed in v0.17.0. (:issue: `2764`, :pull:`2766`)
-* The method :py:meth:`pvlib.modelchain.ModelChain._prep_inputs_tracking` is
-  deprecated and will be removed in v0.17.0. (:issue: `2764`, :pull:`2766`)
 
 
 Bug fixes
diff --git a/pvlib/modelchain.py b/pvlib/modelchain.py
index 34f9f04600..fc26dfe1a0 100644
--- a/pvlib/modelchain.py
+++ b/pvlib/modelchain.py
@@ -1265,13 +1265,6 @@ def _prep_inputs_airmass(self):
             model=self.airmass_model)
         return self
 
-    @deprecated(
-        since="0.15.2",
-        removal="0.17.0",
-        name="Modelchain._prep_inputs_tracking",
-        alternative=None,
-        addendum=None,
-    )
     def _prep_inputs_tracking(self):
         """
         Calculate tracker position and AOI
diff --git a/tests/test_modelchain.py b/tests/test_modelchain.py
index 638ccf306e..a8d87edd25 100644
--- a/tests/test_modelchain.py
+++ b/tests/test_modelchain.py
@@ -1840,19 +1840,6 @@ def test_get_orientation_deprecation():
     assert surface_azimuth == 180
 
 
-@fail_on_pvlib_version('0.17.0')
-def test_prep_inputs_tracking_deprecation(sapm_dc_snl_ac_system, location):
-    mc = ModelChain(sapm_dc_snl_ac_system, location)
-    # Set up mock results and system attributes required by the method
-    mc.results = MagicMock()
-    mc.system.singleaxis = MagicMock()
-    mc.system.axis_tilt = 0.0
-    mc.system.axis_azimuth = 180.0
-    with pytest.warns(pvlibDeprecationWarning,
-                      match='will be removed in 0.17.0.'):
-        mc._prep_inputs_tracking()
-
-
 # tests for PVSystem with multiple Arrays
 def test_with_sapm_pvsystem_arrays(sapm_dc_snl_ac_system_Array, location,
                                    weather):

From 994816d490619cace2abd039d30b4a72aeccc73a Mon Sep 17 00:00:00 2001
From: Johann Lo <65318981+JoLo90@users.noreply.github.com>
Date: Fri, 7 Aug 2026 10:31:05 +0200
Subject: [PATCH 3/4] refactor: delete instead of deprecate liujordan

---
 docs/sphinx/source/whatsnew/v0.16.0.rst |  8 +++
 pvlib/irradiance.py                     | 71 -------------------------
 tests/test_clearsky.py                  | 11 +---
 tests/test_irradiance.py                |  9 ----
 4 files changed, 9 insertions(+), 90 deletions(-)

diff --git a/docs/sphinx/source/whatsnew/v0.16.0.rst b/docs/sphinx/source/whatsnew/v0.16.0.rst
index 1316a7a9c1..afeedd731c 100644
--- a/docs/sphinx/source/whatsnew/v0.16.0.rst
+++ b/docs/sphinx/source/whatsnew/v0.16.0.rst
@@ -16,6 +16,13 @@ Breaking Changes
 * Remove empty ``poa_horizon`` key from the ``diffuse_components`` output of
   :py:func:`pvlib.irradiance.haydavies`.
   (:pull:`2788`)
+v0.16.0 (Anticipated 2026)
+--------------------------
+
+Breaking Changes
+~~~~~~~~~~~~~~~~
+* Removed private function :py:func:`pvlib.irradiance._liujordan`.
+  (:issue:`2764`, :pull:`2766`)
 
 
 Deprecations
@@ -83,3 +90,4 @@ Contributors
 * Andrew Chen (:ghuser:`chuenchen309`)
 * Sai Asish Y (:ghuser:`SAY-5`)
 * Kevin Anderson (:ghuser:`kandersolar`)
+* :ghuser:`JoLo90`
diff --git a/pvlib/irradiance.py b/pvlib/irradiance.py
index b7a1378590..9d6ddbe665 100644
--- a/pvlib/irradiance.py
+++ b/pvlib/irradiance.py
@@ -18,7 +18,6 @@
 
 from pvlib._deprecation import pvlibDeprecationWarning, deprecated
 import warnings
-from pvlib._deprecation import deprecated
 
 
 # Deprecation warning based on https://peps.python.org/pep-0562/
@@ -3235,76 +3234,6 @@ def campbell_norman(zenith, transmittance, pressure=101325.0,
     return irrads
 
 
-@deprecated(
-    since="0.15.2",
-    removal="0.17.0",
-    name="_liujordan",
-    addendum=None,
-)
-def _liujordan(zenith: pd.Series, transmittance: float,
-               airmass: float, dni_extra=1367.0) -> pd.DataFrame:
-    '''
-    Determine DNI, DHI, GHI from extraterrestrial flux, transmittance,
-    and optical air mass number.
-
-    Liu and Jordan, 1960, developed a simplified direct radiation model.
-    DHI is from an empirical equation for diffuse radiation from Liu and
-    Jordan, 1960.
-
-    Parameters
-    ----------
-    zenith: pd.Series
-        True (not refraction-corrected) zenith angles in decimal
-        degrees. If Z is a vector it must be of the same size as all
-        other vector inputs. [°]
-
-    transmittance: float
-        Atmospheric transmittance between 0 and 1.
-
-    airmass: float
-        Absolute airmass.
-
-    dni_extra: float, default 1367.0
-        Direct irradiance incident at the top of the atmosphere. [W/m²]
-
-    Returns
-    -------
-    irradiance: DataFrame
-        Modeled direct normal irradiance, direct horizontal irradiance,
-        and global horizontal irradiance in Wm⁻²
-
-    References
-    ----------
-    .. [1] Campbell, G. S., J. M. Norman (1998) An Introduction to
-       Environmental Biophysics. 2nd Ed. New York: Springer.
-
-    .. [2] Liu, B. Y., R. C. Jordan, (1960). "The interrelationship and
-       characteristic distribution of direct, diffuse, and total solar
-       radiation".  Solar Energy 4:1-19
-
-    .. deprecated:: 0.15.2
-        The ``_liujordan`` function is deprecated and will be
-        removed in 0.17.0.
-        Use the ``liujordan`` function instead.
-    '''
-
-    tau = transmittance
-
-    dni = dni_extra*tau**airmass
-    dhi = 0.3 * (1.0 - tau**airmass) * dni_extra * np.cos(np.radians(zenith))
-    ghi = dhi + dni * np.cos(np.radians(zenith))
-
-    irrads = OrderedDict()
-    irrads['ghi'] = ghi
-    irrads['dni'] = dni
-    irrads['dhi'] = dhi
-
-    if isinstance(ghi, pd.Series):
-        irrads = pd.DataFrame(irrads)
-
-    return irrads
-
-
 def _get_perez_coefficients(perezmodel):
     '''
     Find coefficients for the Perez model
diff --git a/tests/test_clearsky.py b/tests/test_clearsky.py
index d55fd0cc1e..ed1ce85c64 100644
--- a/tests/test_clearsky.py
+++ b/tests/test_clearsky.py
@@ -8,15 +8,13 @@
 
 import pytest
 from numpy.testing import assert_allclose
-from .conftest import (assert_frame_equal, assert_series_equal,
-                       fail_on_pvlib_version)
+from .conftest import assert_frame_equal, assert_series_equal
 
 from pvlib.location import Location
 from pvlib import clearsky
 from pvlib import solarposition
 from pvlib import atmosphere
 from pvlib import irradiance
-from pvlib._deprecation import pvlibDeprecationWarning
 
 from .conftest import TESTS_DATA_DIR
 
@@ -897,10 +895,3 @@ def test_bird():
         testdata2[['Direct Beam', 'Direct Hz',
                    'Global Hz', 'Dif Hz']].iloc[11],
         rtol=1e-3)
-
-
-@fail_on_pvlib_version('0.17.0')
-def test_is_leap_year_deprecation():
-    with pytest.warns(pvlibDeprecationWarning,
-                      match='will be removed in 0.17.0.'):
-        clearsky._is_leap_year(2020)
diff --git a/tests/test_irradiance.py b/tests/test_irradiance.py
index ce1a711e3b..f5f1c7ebd6 100644
--- a/tests/test_irradiance.py
+++ b/tests/test_irradiance.py
@@ -14,7 +14,6 @@
 from .conftest import (
     assert_frame_equal,
     assert_series_equal,
-    fail_on_pvlib_version,
     requires_ephem,
     requires_numba,
 )
@@ -1671,11 +1670,3 @@ def test_diffuse_par_spitters():
         0.99591, 0.99576, 0.99472, 0.99270, 0.99283, 0.99406, 0.99581, 0.99591,
     ])  # fmt: skip
     assert_allclose(result, expected, atol=1e-5)
-
-
-@fail_on_pvlib_version('0.17.0')
-def test_liujordan_deprecation():
-    zenith = pd.Series([45.0, 50.0, 55.0])
-    with pytest.warns(pvlibDeprecationWarning,
-                      match='will be removed in 0.17.0.'):
-        irradiance._liujordan(zenith, transmittance=0.7, airmass=1.5)

From 1897e4b681dfa41b68a04e6051df17303a340057 Mon Sep 17 00:00:00 2001
From: Johann Lo <65318981+JoLo90@users.noreply.github.com>
Date: Fri, 7 Aug 2026 11:02:52 +0200
Subject: [PATCH 4/4] refactor: delete instead of deprecate functions
 parse_bsrn, parse_epw, parse_cams, get_orientation and delete decorator for
 deprecation for get_cams

---
 docs/sphinx/source/reference/iotools.rst    |  3 --
 docs/sphinx/source/reference/modelchain.rst |  9 -----
 docs/sphinx/source/whatsnew/v0.16.0.rst     | 20 ++++++----
 pvlib/iotools/__init__.py                   |  4 +-
 pvlib/iotools/bsrn.py                       |  5 ---
 pvlib/iotools/epw.py                        |  5 ---
 pvlib/iotools/sodapro.py                    | 11 ------
 pvlib/modelchain.py                         | 43 ---------------------
 tests/iotools/test_bsrn.py                  | 10 +----
 tests/iotools/test_epw.py                   | 11 ------
 tests/iotools/test_sodapro.py               |  6 ---
 tests/test_modelchain.py                    | 22 +----------
 12 files changed, 16 insertions(+), 133 deletions(-)

diff --git a/docs/sphinx/source/reference/iotools.rst b/docs/sphinx/source/reference/iotools.rst
index 3d5729935d..bd0661e762 100644
--- a/docs/sphinx/source/reference/iotools.rst
+++ b/docs/sphinx/source/reference/iotools.rst
@@ -54,7 +54,6 @@ clear-sky irradiance globally.
 
    iotools.get_cams
    iotools.read_cams
-   iotools.parse_cams
 
 
 NASA POWER
@@ -152,7 +151,6 @@ long-wave radiation.
 
    iotools.get_bsrn
    iotools.read_bsrn
-   iotools.parse_bsrn
 
 
 SOLRAD
@@ -269,7 +267,6 @@ Functions for reading irradiance/weather data files.
    iotools.read_tmy2
    iotools.read_tmy3
    iotools.read_epw
-   iotools.parse_epw
    iotools.read_panond
 
 
diff --git a/docs/sphinx/source/reference/modelchain.rst b/docs/sphinx/source/reference/modelchain.rst
index 89de825f0d..56c0cfccd8 100644
--- a/docs/sphinx/source/reference/modelchain.rst
+++ b/docs/sphinx/source/reference/modelchain.rst
@@ -115,12 +115,3 @@ on the information in the associated :py:class:`~pvsystem.PVSystem` object.
    modelchain.ModelChain.infer_temperature_model
    modelchain.ModelChain.infer_losses_model
 
-Functions
----------
-
-Functions for power modeling.
-
-.. autosummary::
-   :toctree: generated/
-
-   modelchain.get_orientation
diff --git a/docs/sphinx/source/whatsnew/v0.16.0.rst b/docs/sphinx/source/whatsnew/v0.16.0.rst
index afeedd731c..fa04ae1ab7 100644
--- a/docs/sphinx/source/whatsnew/v0.16.0.rst
+++ b/docs/sphinx/source/whatsnew/v0.16.0.rst
@@ -16,14 +16,20 @@ Breaking Changes
 * Remove empty ``poa_horizon`` key from the ``diffuse_components`` output of
   :py:func:`pvlib.irradiance.haydavies`.
   (:pull:`2788`)
-v0.16.0 (Anticipated 2026)
---------------------------
-
-Breaking Changes
-~~~~~~~~~~~~~~~~
 * Removed private function :py:func:`pvlib.irradiance._liujordan`.
   (:issue:`2764`, :pull:`2766`)
-
+* Removed deprecated iotools aliases :py:func:`pvlib.iotools.parse_bsrn`,
+  :py:func:`pvlib.iotools.parse_epw`, and
+  :py:func:`pvlib.iotools.parse_cams`. Use
+  :py:func:`pvlib.iotools.read_bsrn`, :py:func:`pvlib.iotools.read_epw`,
+  and :py:func:`pvlib.iotools.read_cams` instead.
+  (:issue:`2767`, :pull:`2766`)
+* Removed deprecated modelchain function
+  :py:func:`pvlib.modelchain.get_orientation`.
+  (:issue:`2767`, :pull:`2766`)
+* Removed the deprecated ``server`` keyword argument from
+  :py:func:`pvlib.iotools.sodapro.get_cams`. Use ``url`` instead.
+  (:issue:`2767`, :pull:`2766`)
 
 Deprecations
 ~~~~~~~~~~~~
@@ -90,4 +96,4 @@ Contributors
 * Andrew Chen (:ghuser:`chuenchen309`)
 * Sai Asish Y (:ghuser:`SAY-5`)
 * Kevin Anderson (:ghuser:`kandersolar`)
-* :ghuser:`JoLo90`
+* Johann Loux (:ghuser:`JoLo90`)
diff --git a/pvlib/iotools/__init__.py b/pvlib/iotools/__init__.py
index 28ff223554..5f9c7103b7 100644
--- a/pvlib/iotools/__init__.py
+++ b/pvlib/iotools/__init__.py
@@ -1,5 +1,5 @@
 from pvlib.iotools.tmy import read_tmy2, read_tmy3  # noqa: F401
-from pvlib.iotools.epw import read_epw, parse_epw  # noqa: F401
+from pvlib.iotools.epw import read_epw  # noqa: F401
 from pvlib.iotools.srml import read_srml  # noqa: F401
 from pvlib.iotools.srml import get_srml  # noqa: F401
 from pvlib.iotools.surfrad import read_surfrad  # noqa: F401
@@ -22,10 +22,8 @@
 from pvlib.iotools.pvgis import get_pvgis_horizon  # noqa: F401
 from pvlib.iotools.bsrn import get_bsrn  # noqa: F401
 from pvlib.iotools.bsrn import read_bsrn  # noqa: F401
-from pvlib.iotools.bsrn import parse_bsrn  # noqa: F401
 from pvlib.iotools.sodapro import get_cams  # noqa: F401
 from pvlib.iotools.sodapro import read_cams  # noqa: F401
-from pvlib.iotools.sodapro import parse_cams  # noqa: F401
 from pvlib.iotools.panond import read_panond  # noqa: F401
 from pvlib.iotools.acis import get_acis_prism  # noqa: F401
 from pvlib.iotools.acis import get_acis_nrcc  # noqa: F401
diff --git a/pvlib/iotools/bsrn.py b/pvlib/iotools/bsrn.py
index 9e6c222314..7c02866e1c 100644
--- a/pvlib/iotools/bsrn.py
+++ b/pvlib/iotools/bsrn.py
@@ -10,7 +10,6 @@
 import os
 
 from pvlib.tools import _file_context_manager
-from pvlib._deprecation import deprecated
 
 BSRN_FTP_URL = "ftp.bsrn.awi.de"
 
@@ -462,7 +461,3 @@ def read_bsrn(filename, logical_records=('0100',)):
     with open_func(filename, mode) as f:
         content = _parse_bsrn(f, logical_records)
     return content
-
-
-parse_bsrn = deprecated(since="0.13.0",  removal="0.17.0", name="parse_bsrn",
-                        alternative="read_bsrn")(read_bsrn)
diff --git a/pvlib/iotools/epw.py b/pvlib/iotools/epw.py
index 561419fc00..01c87c180a 100644
--- a/pvlib/iotools/epw.py
+++ b/pvlib/iotools/epw.py
@@ -7,7 +7,6 @@
 import pandas as pd
 
 from pvlib.tools import _file_context_manager
-from pvlib._deprecation import deprecated
 
 
 def read_epw(filename, coerce_year=None):
@@ -309,7 +308,3 @@ def _parse_epw(csvdata, coerce_year=None):
     data.index = idx
 
     return data, meta
-
-
-parse_epw = deprecated(since="0.13.0", removal="0.17.0", name="parse_epw",
-                       alternative="read_epw")(read_epw)
diff --git a/pvlib/iotools/sodapro.py b/pvlib/iotools/sodapro.py
index 81212d8112..2e88590ddd 100644
--- a/pvlib/iotools/sodapro.py
+++ b/pvlib/iotools/sodapro.py
@@ -9,8 +9,6 @@
 import warnings
 from pvlib import tools
 
-from pvlib._deprecation import deprecated, renamed_kwarg_warning
-
 URL = 'api.soda-solardata.com'
 
 CAMS_INTEGRATED_COLUMNS = [
@@ -45,11 +43,6 @@
                                  '0 year 1 month 0 day 0 h 0 min 0 s': '1M'}
 
 
-@renamed_kwarg_warning(
-    since='0.13.0',
-    old_param_name='server',
-    new_param_name='url',
-    removal="0.14.0")
 def get_cams(latitude, longitude, start, end, email, identifier='mcclear',
              altitude=None, time_step='1h', time_ref='UT', verbose=False,
              integrated=False, label=None, map_variables=True,
@@ -357,7 +350,3 @@ def read_cams(filename, integrated=False, label=None, map_variables=True):
         data = data.rename(columns=VARIABLE_MAP)
 
     return data, metadata
-
-
-parse_cams = deprecated(since="0.13.0", removal="0.17.0", name="parse_cams",
-                        alternative="read_cams")(read_cams)
diff --git a/pvlib/modelchain.py b/pvlib/modelchain.py
index fc26dfe1a0..32af129fd7 100644
--- a/pvlib/modelchain.py
+++ b/pvlib/modelchain.py
@@ -18,8 +18,6 @@
 from pvlib.pvsystem import _DC_MODEL_PARAMS
 from pvlib.tools import _build_kwargs
 
-from pvlib._deprecation import deprecated
-
 # keys that are used to detect input data and assign data to appropriate
 # ModelChain attribute
 # for ModelChain.weather
@@ -61,47 +59,6 @@
 )
 
 
-@deprecated(
-    since="0.13.1",
-    removal="0.17.0",
-    name="pvlib.modelchain.get_orientation",
-    alternative=None,
-    addendum=None,
-)
-def get_orientation(strategy, **kwargs):
-    """
-    Determine a PV system's surface tilt and surface azimuth
-    using a named strategy.
-
-    Parameters
-    ----------
-    strategy: str
-        The orientation strategy.
-        Allowed strategies include 'flat', 'south_at_latitude_tilt'.
-    **kwargs:
-        Strategy-dependent keyword arguments. See code for details.
-
-    Returns
-    -------
-    surface_tilt, surface_azimuth
-
-    .. deprecated:: 0.15.2
-        The ``get_orientation`` function is deprecated and will be removed
-        in 0.17.0.
-    """
-    if strategy == 'south_at_latitude_tilt':
-        surface_azimuth = 180
-        surface_tilt = kwargs['latitude']
-    elif strategy == 'flat':
-        surface_azimuth = 180
-        surface_tilt = 0
-    else:
-        raise ValueError('invalid orientation strategy. strategy must '
-                         'be one of south_at_latitude_tilt, flat,')
-
-    return surface_tilt, surface_azimuth
-
-
 def _getmcattr(self, attr):
     """
     Helper for __repr__ methods, needed to avoid recursion in property
diff --git a/tests/iotools/test_bsrn.py b/tests/iotools/test_bsrn.py
index 5bb9434f47..6b5f356836 100644
--- a/tests/iotools/test_bsrn.py
+++ b/tests/iotools/test_bsrn.py
@@ -6,7 +6,7 @@
 import pytest
 import os
 import tempfile
-from pvlib.iotools import read_bsrn, get_bsrn, parse_bsrn
+from pvlib.iotools import read_bsrn, get_bsrn
 from tests.conftest import (
     TESTS_DATA_DIR,
     RERUNS,
@@ -15,8 +15,6 @@
     requires_bsrn_credentials,
 )
 
-from pvlib._deprecation import pvlibDeprecationWarning
-
 
 @pytest.fixture(scope="module")
 def bsrn_credentials():
@@ -35,12 +33,6 @@ def expected_index():
                          tz='UTC')
 
 
-def test_parse_bsrn_deprecated():
-    with pytest.warns(pvlibDeprecationWarning, match='Use read_bsrn instead'):
-        with open(TESTS_DATA_DIR / 'bsrn-lr0100-pay0616.dat') as fbuf:
-            data, metadata = parse_bsrn(fbuf)
-
-
 @pytest.mark.parametrize('testfile', [
     ('bsrn-pay0616.dat.gz'),
     ('bsrn-lr0100-pay0616.dat'),
diff --git a/tests/iotools/test_epw.py b/tests/iotools/test_epw.py
index a2c7883269..9f1dd48ff4 100644
--- a/tests/iotools/test_epw.py
+++ b/tests/iotools/test_epw.py
@@ -3,8 +3,6 @@
 from pvlib.iotools import epw
 from tests.conftest import TESTS_DATA_DIR, RERUNS, RERUNS_DELAY
 
-from pvlib._deprecation import pvlibDeprecationWarning
-
 epw_testfile = TESTS_DATA_DIR / 'NLD_Amsterdam062400_IWEC.epw'
 
 
@@ -23,15 +21,6 @@ def test_read_epw_buffer():
     assert meta['latitude'] == 52.3
 
 
-def test_parse_epw_deprecated():
-    with pytest.warns(pvlibDeprecationWarning, match='Use read_epw instead'):
-        with open(epw_testfile, 'r') as f:
-            df, meta = epw.parse_epw(f)
-    assert len(df) == 8760
-    assert 'ghi' in df.columns
-    assert meta['latitude'] == 52.3
-
-
 @pytest.mark.remote_data
 @pytest.mark.flaky(reruns=RERUNS, reruns_delay=RERUNS_DELAY)
 def test_read_epw_remote():
diff --git a/tests/iotools/test_sodapro.py b/tests/iotools/test_sodapro.py
index 4276b8826e..cf40c654a2 100644
--- a/tests/iotools/test_sodapro.py
+++ b/tests/iotools/test_sodapro.py
@@ -193,12 +193,6 @@ def test_read_cams_integrated_unmapped_label():
     assert_frame_equal(out, expected, check_less_precise=True)
 
 
-def test_parse_cams_deprecated():
-    with pytest.warns(pvlibDeprecationWarning, match='Use read_cams instead'):
-        with open(testfile_radiation_verbose, mode="r") as fbuf:
-            _ = sodapro.parse_cams(fbuf)
-
-
 def test_read_cams_metadata():
     _, metadata = sodapro.read_cams(testfile_mcclear_monthly, integrated=False)
     assert metadata['Time reference'] == 'Universal time (UT)'
diff --git a/tests/test_modelchain.py b/tests/test_modelchain.py
index a8d87edd25..e15e155dbb 100644
--- a/tests/test_modelchain.py
+++ b/tests/test_modelchain.py
@@ -1,5 +1,4 @@
 import sys
-from unittest.mock import MagicMock
 
 import numpy as np
 import pandas as pd
@@ -9,10 +8,8 @@
 from pvlib.pvsystem import PVSystem
 from pvlib.location import Location
 
-from pvlib._deprecation import pvlibDeprecationWarning
+from .conftest import assert_series_equal, assert_frame_equal
 
-from .conftest import (assert_series_equal, assert_frame_equal,
-                       fail_on_pvlib_version)
 import pytest
 
 
@@ -1823,23 +1820,6 @@ def test_invalid_models(model, sapm_dc_snl_ac_system, location):
         ModelChain(sapm_dc_snl_ac_system, location, **kwargs)
 
 
-@fail_on_pvlib_version('0.17.0')
-def test_bad_get_orientation():
-    with pytest.warns(pvlibDeprecationWarning,
-                      match='will be removed in 0.17.0.'):
-        with pytest.raises(ValueError):
-            modelchain.get_orientation('bad value')
-
-
-@fail_on_pvlib_version('0.17.0')
-def test_get_orientation_deprecation():
-    with pytest.warns(pvlibDeprecationWarning,
-                      match='will be removed in 0.17.0.'):
-        surface_tilt, surface_azimuth = modelchain.get_orientation('flat')
-    assert surface_tilt == 0
-    assert surface_azimuth == 180
-
-
 # tests for PVSystem with multiple Arrays
 def test_with_sapm_pvsystem_arrays(sapm_dc_snl_ac_system_Array, location,
                                    weather):