PHOTOVOLTAIC SYSTEM SIMULATION PROGRAM Sandia National Laboratory has developed a Photovoltaic System Simulation Program For Stand Alone and Grid Interactive Applications called PVFORM. During design of PV systems, PVFORM may assist the designer in optimizing system design to achieve the maximum economic benefit given its proposed location and operating conditions. Given either program supplied default values or user supplied data for program parameters, PVFORM performs a series of hourly calculations to determine the physical (photovoltaic) performance of the PV system being simulated. These interactive calculations sample performance throughout a 365 day year of system operation and are accomplished hourly. Results are summarized on a monthly basis in output tables. PVFORM Version 3.3 will run on PCs running MS-DOS 3.0 or later, on a mini-computer, or any mainframe that supports ANSI FORTRAN 77. PVFORM requires a minimum of 256 kilobytes of RAM. A Math Co-Processor is strongly recommended to enhance performance. PVFORM Version 4.0 has been developed to operate in a windows environment but requires testing before release. Sandia is seeking U.S. companies who will further expand the commercial potential of this product by assuming responsibility for maintaining, updating, and distributing PVFORM, and by supporting user inquiries. For further information, please respond by mail or fax to Kay Carter at: Sandia National Laboratories, MS1380, P.O. Box 5800, Albuquerque, NM 87185. Fax (505)-271-7867. Please indicate the date and title of this CBD notice in your response.

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