Comparing one year data of 57 on ground Pyranometer's with four most popular meteo-data sets
We collected Actual Global Tilted Irradiation (AGTI) of 57 sites from operational projects spread across in India. It was then correlated with Expected Global Tilted Irradiation (EGTI) from the following meteo-databases namely:
NASA (National Aeronautics and Space Administration),
NREL (National Renewable Energy Laboratory)
Key Takeaways for Stakeholders
Analysis carried on EGTI as month on month GHI to GTI gain (%) is following similar trend for all sites and meteo-databases considered.
Month-wise AGTI values are correlated with month- wise EGTI P50 values for North. East, West & South zones.
Annual AGTI values are correlated with annual EGTI P50 & P75 values.
a) Annual Solar Radiation Correlation – Sites in %