Performance and Reliability of a 1-kW Amorphous Silicon Photovoltaic Roofing System

J. Adelstein, B. Sekulic

Research output: Contribution to conferencePaperpeer-review

29 Scopus Citations


The National Renewable Energy Laboratory (NREL) has been monitoring the performance of a 1- kW Ac United Solar Systems Corporation (USSC) roofing system over the 6-year period from October 1998 to September 2004. This paper will investigate the performance and reliability of this system. The annual degradation and seasonal fluctuation of the system's power output are calculated using the PVUSA power rating regression model. The system performance is also examined using the additional performance parameters of yield, reference yield, and performance ratio, which allows for a somewhat less complicated data collection and analysis. The data indicate that the system has exhibited stable performance over time, with an overall degradation rate comparable to that found in crystalline silicon systems.

Original languageAmerican English
Number of pages4
StatePublished - 2005
Event31st IEEE Photovoltaic Specialists Conference - 2005 - Lake Buena Vista, FL, United States
Duration: 3 Jan 20057 Jan 2005


Conference31st IEEE Photovoltaic Specialists Conference - 2005
Country/TerritoryUnited States
CityLake Buena Vista, FL

Bibliographical note

For preprint version see NREL/CP-520-36583

NREL Publication Number

  • NREL/CP-520-38907


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