U.S. Solar Resource Map - National Renewable Energy Laboratory Data #2061837 (License: Personal Use)

The map displays annual average direct normal solar irradiance using a gradient from red (highest, >8.3 kWh/m²/day) to purple (lowest, <1.3 kWh/m²/day), based on satellite and modeled data from 1998-2005. It includes all 50 states, with Alaska and Hawaii shown inset, and reflects climatological modeling by NREL’s Solar Radiation Model (2003). The data supports solar project siting, policy development, and educational outreach on renewable energy potential.

Used on energy agency websites, solar installer landing pages, academic resources, and sustainability reports; targets users researching solar feasibility, comparing regional potential, or seeking authoritative renewable energy data.