Runtime warning in singleaxis tracker

Describe the bug ~\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pvlib\tracking.py:555: RuntimeWarning: invalid value encountered in remainder surface_azimuth = surface_azimuth % 360

To Reproduce I used this code : import pandas as pd import numpy as np import pvlib azimuth = pd.read_csv("Azimuth.csv") zenith = pd.read_csv("solar2.csv") Plib = pvlib.tracking.SingleAxisTracker() data=Plib.singleaxis(apparent_zenith=zenith['SolarZenithAngle'],apparent_azimuth=azimuth['Azimuth']) print(data) Expected behavior Should have got the tracking values

Screenshots If applicable, add screenshots to help explain your problem.

Versions:

• pvlib.__version__: 0.7.1
• pandas.__version__: 1.0.1
• python: 3.8.1

Additional context solar2.csv and Azimuth.csv are normal csv files with Irradiance and angle data Similar to issue #622 Didnt find a solution there or anywhere else

[HrushikeshBodas]

Sure Thanks a lot for your help!

[mikofski]

@HrushikeshBodas, we frequently see issues when the datetime series is not timezone aware. Can you make sure that the timezone is correct? You can use either the tz argument in pandas.DatetimeIndex or the .tz_localize method to convert a naive datetime series to timezone aware. A quick way to tell is to check the solar position, if the solar zenith is less than 90° during the day and a minimum near noon.

If you find you have now resolved this issue, perhaps you can close it? Thanks!

Also I encourage you and others to read through and/or post on the pvlib Google Group or with the [pvlib] tag on StackOverflow before posting an issue. For more information, please see the documentation section on getting help.

Cheers!