updated get_month_solar_data()
updated get_month_solar_data()


Former-commit-id: 27fc26b4f78ef1b750152ecae6e1c7407a6883d1
Former-commit-id: ac86e4aa5b4a8b826cc85d7638b883310d87b4bf
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy