Hi Paul,
Thanks for the clarification. I'm actually only using the PV performance model, not the financial model. So if I understand you correctly, SAM calculates sun position using the Month, Day, Hour, and Minute columns, but it assigns a timestamp to the solar irradiance data based on row number. If the first row of solar irradiance data is always assigned to the hour that ends at 1 am on January 1, how would that data ever be consistent with a timestamp at 30 minutes?
For instance, here is data with timestamps shifted from UTC -> IST:
I could add 4 dummy rows at the top so that the first row corresponds to the hour 12:30 - 1:30 am on January 1. However, based on what you said earlier, SAM would still assign the first row to 12 -1 am. Alternatively, I could interpolate every two rows to manufacture data at the top of each hour, but then there'd be no use for the Minute column at all. What do you suggest?
Thanks again!
Marty