diff --git a/docs/sphinx/source/whatsnew/v0.9.0.rst b/docs/sphinx/source/whatsnew/v0.9.0.rst
index 07c466783c..aeb600b100 100644
--- a/docs/sphinx/source/whatsnew/v0.9.0.rst
+++ b/docs/sphinx/source/whatsnew/v0.9.0.rst
@@ -163,6 +163,8 @@ Bug fixes
 * Fix floating point round-off issue in
   :py:func:`~pvlib.irradiance.aoi_projection` (:issue:`1185`, :pull:`1191`)
 * Update GFS product names for GFS v16. (:issue:`1202`, :pull:`1203`)
+* Take into account ``EgRef``, ``dEgdT``, ``irrad_ref`` and ``temp_ref`` when
+  calling :py:func:`~pvlib.pvsystem.calcparams_cec`. (:issue:`1215`, :pull:`1216`)
 * Corrected methodology error in :py:func:`~pvlib.scaling.wvm`. Tracks with
   fix in PVLib for MATLAB. (:issue:`1206`, :pull:`1213`)
 
@@ -197,5 +199,6 @@ Contributors
 * Joshua Stein (:ghuser:`jsstein`)
 * Tony Lorenzo (:ghuser:`alorenzo175`)
 * Damjan Postolovski (:ghuser:`dpostolovski`)
+* Miguel Sánchez de León Peque (:ghuser:`Peque`)
 * Joe Ranalli (:ghuser:`jranalli`)
 * Chas Schweizer (:ghuser:`cpr-chas`)
diff --git a/pvlib/pvsystem.py b/pvlib/pvsystem.py
index 43b856b903..06230d6c95 100644
--- a/pvlib/pvsystem.py
+++ b/pvlib/pvsystem.py
@@ -1994,8 +1994,8 @@ def calcparams_cec(effective_irradiance, temp_cell,
                              alpha_sc*(1.0 - Adjust/100),
                              a_ref, I_L_ref, I_o_ref,
                              R_sh_ref, R_s,
-                             EgRef=1.121, dEgdT=-0.0002677,
-                             irrad_ref=1000, temp_ref=25)
+                             EgRef=EgRef, dEgdT=dEgdT,
+                             irrad_ref=irrad_ref, temp_ref=temp_ref)
 
 
 def calcparams_pvsyst(effective_irradiance, temp_cell,
diff --git a/pvlib/tests/test_pvsystem.py b/pvlib/tests/test_pvsystem.py
index d0abdefd4b..4533e58567 100644
--- a/pvlib/tests/test_pvsystem.py
+++ b/pvlib/tests/test_pvsystem.py
@@ -792,6 +792,43 @@ def test_calcparams_cec(cec_module_params):
                         check_less_precise=3)
 
 
+def test_calcparams_cec_extra_params_propagation(cec_module_params, mocker):
+    """
+    See bug #1215.
+
+    When calling `calcparams_cec`, the parameters `EgRef`, `dEgdT`, `irrad_ref`
+    and `temp_ref` must not be ignored.
+
+    Since, internally, this function is calling `calcparams_desoto`, this test
+    checks that the latter is called with the expected parameters instead of
+    some default values.
+    """
+    times = pd.date_range(start='2015-01-01', periods=3, freq='12H')
+    effective_irradiance = pd.Series([0.0, 800.0, 800.0], index=times)
+    temp_cell = pd.Series([25, 25, 50], index=times)
+    extra_parameters = dict(
+        EgRef=1.123,
+        dEgdT=-0.0002688,
+        irrad_ref=1100,
+        temp_ref=23,
+    )
+    m = mocker.spy(pvsystem, 'calcparams_desoto')
+    pvsystem.calcparams_cec(
+        effective_irradiance=effective_irradiance,
+        temp_cell=temp_cell,
+        alpha_sc=cec_module_params['alpha_sc'],
+        a_ref=cec_module_params['a_ref'],
+        I_L_ref=cec_module_params['I_L_ref'],
+        I_o_ref=cec_module_params['I_o_ref'],
+        R_sh_ref=cec_module_params['R_sh_ref'],
+        R_s=cec_module_params['R_s'],
+        Adjust=cec_module_params['Adjust'],
+        **extra_parameters,
+    )
+    assert m.call_count == 1
+    assert m.call_args[1] == extra_parameters
+
+
 def test_calcparams_pvsyst(pvsyst_module_params):
     times = pd.date_range(start='2015-01-01', periods=2, freq='12H')
     effective_irradiance = pd.Series([0.0, 800.0], index=times)