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2200 2000 1800 1600 1400 1200 1000 1998 1999 2000 2001 2002 2003 2004 Fixed Latitude Fixed Horizontal Tracking Horizontal Tracking Tilted Fig. 2. Final annual yield for Phoenix The analysis has also initiated an investigation into costs to operate and maintain these systems. At this point, it has been determined that the average annual cost of O&M for the tracking horizontal configurations is 0.35% of the initial system installed cost. The collection of adequate data for such an analysis on a statistically significant basis, however, will require further collection over an extended period. This analysis has generated several conclusions, which have been documented in a paper that has been accepted for publication in an upcoming edition of the journal Progress in Photovoltaics. Among these conclusions: • The tracking horizontal configuration provides the least energy cost of the configurations examined. • For the systems examined, the energy production benefits of tracking were substantial—between 23% and 37% better than fixed configurations. • For 2003, the average installed cost for tracking horizontal systems greater than 90 kWdc is $5.96/Wdc, with the least expensive costing $5.18/Wdc. Additional conclusions can be found in the paper. 4. Planned FY 2005 Activities • Refine PV performance and cost models based on discussions with technology experts and user feedback (9/05). • Develop and incorporate more complete inverter models into PV system model (3/05). • Release version one of the PV model (6/30). • Continue to work on improving our understanding of the long-term market potential for PV technologies • Carry out detailed value analysis of PV technologies. • Complete a PV cost model for inclusion in the PV system model. • Conduct an historical study of trends in costs and prices of installed PV systems and the positive impacts of the DOE Solar Program on these costs. 5. Major FY 2004 Publications R. Perez et al., “Availability of Dispersed Photovoltaic Resource During the August 14th 2003 Northeast Power Outage” Paper presented at the ASES 2004 Conference in Portland, Oregon, July 11–14, 2004. T. Hoff and R. Margolis. “Are Photovoltaic Systems Worth More to Residential Consumers on Net Metered Time-of-Use Rates?” Paper presented at the ASES 2004 Conference in Portland, Oregon, July 11–14, 2004. L. Moore, et al. “Photovoltaic Power Plant Experience at Arizona Public Service: A 5-Year Assessment,” accepted for publication in FY 2005 by Progress in Photovoltaics. Annual (kWhac)/(kWdc)PDF Image | FY 2004 ANNUAL REPORT DOE Solar
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