Geostellar: Remote Solar Energy Assessments Personalized

Joseph Simon, Jennifer Melius

Research output: NRELFact Sheet


Geostellar has produced an online tool that generates a unique solar profile for homeowners to learn about the financial benefits to installing rooftop solar panels on their home. The website incorporates the physical building characteristics of the home, including shading, slope, and orientation of the roof, and applies electricity costs and incentives to determine the best solar energy estimated energy production values against actual installed rooftop photovoltaic systems. The validation conducted by NREL concluded that over three-quarters of Geostellar's potential size estimates are at least as large as the actual installed systems, indicating a correct assessment of roof availability. In addition, 87% of Geostellar's 25-year production estimates are within 90% of the actual PV Watts results.
Original languageAmerican English
Number of pages2
StatePublished - 2015

NREL Publication Number

  • NREL/FS-7A40-63615


  • financial benefits
  • geostellar
  • homeowners
  • solar rooftop


Dive into the research topics of 'Geostellar: Remote Solar Energy Assessments Personalized'. Together they form a unique fingerprint.

Cite this