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India Solar Resoource - Annual Average DNI Map
Annual Average DNI Map
JPG 12.5 MB

India Annual Average GHI Map - Annual Average GHI Map
Annual Average GHI Map
JPG 13.3 MB

The cover page of the India Solar Resource Data Fact Sheet
India Solar Resource Data Fact Sheet
PDF 395 KB

India Solar Resource Maps and Data

This page provides solar resource maps and data for India. The 10-kilometer (km) hourly solar resource data were developed using weather satellite (METEOSAT) measurements incorporated into a site-time specific solar modeling approach developed at the U.S. State University of New York at Albany. Hourly data for India, Bangladesh, Bhutan, Nepal, Sri Lanka, and parts of Pakistan and Afghanistan can be downloaded from NREL's National Solar Radiation Database (NSRDB).

These maps and data were originally produced in 2012 for the period from 2002 to 2007. They were updated in 2014 extending the period to 2011. The latest update was released in February 2016 and includes data from 2002 to 2014, and incorporates enhanced aerosols information to improve estimates of direct normal irradiance (DNI).

These products were developed by the U.S. National Renewable Energy Laboratory (NREL) in cooperation with India's Ministry of New and Renewable Energy, through funding from the U.S. Department of Energy and U.S. Department of State.

Please contact Manajit Sengupta for any additional information.

NSRDB - The National Solar Radiation Database

NSRDB is a serially complete collection of hourly and half-hourly values of the three most common measurements of solar radiation—global horizontal, direct normal, and diffuse horizontal irradiance—and meteorological data. These data have been collected at a sufficient number of locations and temporal and spatial scales to accurately represent regional solar radiation climates.

Using these data, it's possible to see the amount of solar energy that was available at a given time and location anywhere in India. Using the data in models, it's possible to predict the potential future availability of solar energy in a location based on past conditions.

Additionally, the NSRDB Viewer, an interactive Web-based GIS application, can be used for visualizing, examining, and downloading complete solar resource data, including TMYs.

Performance and Financial Model Data for SAM

The solar resource data produced by this assessment were designed to be used in a performance model like NREL's System Advisor Model (SAM). SAM is a performance and financial model designed to facilitate decision making for people involved in the renewable energy industry. SAM makes performance predictions and cost of energy estimates for grid-connected power projects based on installation and operating costs and system design parameters that you specify as inputs to the model. Projects can be either on the customer side of the utility meter, buying and selling electricity at retail rates, or on the utility side of the meter, selling electricity at a price negotiated through a power purchase agreement (PPA).

India Weather Files Designed to be Used in SAM


Direct normal irradiance (10-km)

  • Annual average (JPG 1.5 MB) – updated April 2013
  • Monthly average (ZIP 15.8 MB) – updated April 2013

Global horizontal irradiance (10-km)

  • Annual average (JPG 1.5 MB) – updated April 2013
  • Monthly average (ZIP 15.8 MB) – updated April 2013

GIS Data

  • Annual Direct Normal and Global Horizontal Irradiance (ZIP 4.0 MB) – updated April 2013
  • Monthly Direct Normal and Global Horizontal Irradiance (ZIP 4.7 MB) – updated April 2013