change initial condition

Author: cwhanse

pvlib/tests/ivtools/test_sdm.py

@@ -81,9 +81,9 @@ def test_fit_desoto():
 
 
 def test_fit_desoto_init_guess(mocker):
-    init_guess = {'IL_0': 9.4, 'Io_0': 6.0e-7, 'Rs_0': 0.15, 'Rsh_0': 100.,
-                  'a_0': 2.3}
-    init_guess_array = np.array([9.4, 6.0e-7, 0.15, 100., 2.3])
+    init_guess_array = np.array([9.4, 3.0e-9, 0.3, 125., 1.5])
+    init_guess = {k: v for k, v in zip(['IL_0', 'Io_0', 'Rs_0', 'Rsh_0'],
+                                       init_guess_array)}
     mocker.spy(optimize, 'root')
     result, _ = sdm.fit_desoto(v_mp=31.0, i_mp=8.71, v_oc=38.3, i_sc=9.43,
                                alpha_sc=0.005658, beta_voc=-0.13788,