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DOE Solar Energy Technologies Program

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distributed generation systems, which now adopts the IEEE 1547.1 • Development of a test protocol with BEW Engineering for certification of inverters at SNL, subsequently adopted in part for the CEC “Emerging Renewables Program.” • Continuation of NABCEP practitioner certifications with updated tests, study guide, and task analysis. • Correlated with international standards to assure that U.S. industry can compete in the world with major advances in the IEC standard for PV system interconnects and made major steps to remove unneeded testing requirements using rotating equipment. • Advancements and concurrence on critical anti-islanding requirements in the IEC interconnect draft standard. • Initiated a PV Module Certification project to be led by SNL and FSEC to provide more accurate performance characteristics for PV modules. 4. Planned FY 2006 Activities The goals of this project will be continued into FY 2006. Specific activities to support these goals include the following proposed milestones for completion by 9/30/06, subject to funding levels: • Continue reporting small PV system performance results, including degradation rates, to manufacturers and program contacts. Install one or two new technology small PV systems at the OTF and initiate long-term testing (as expense funding permits). • Verify and implement a new in-situ pyranometer calibration procedure for instruments attached to the OTF PV systems. • Implement improvements to PVWATTS systems analysis software by adding international sites. • Report results of collaborations between NREL and SNL and industry to evaluate performance-based assessment of system performance. • Transfer World Radiometric Reference to NREL Reference Absolute Cavity Radiometers through results of the Intercomparison. • Submit revised American Society for Testing and Materials (ASTM) pyrheliometer and pyranometer calibration standard documents for final ASTM ballot approval. • Publish a journal article on environmental influences on solar radiometer calibration errors. • Support Practitioner Certification through small contracts for NABCEP committee work. • Support international and domestic safety standards, including UL, IEEE, IEC, and ASTM. • Evolve the Test Protocol for Certification of Inverters to address MPTT/array utilization. • Collaborate with UL to address ungrounded systems issues related to standards, codes, and safety. • Continue support of Industry Forum proposals for changes to the 2008 NEC. 5. Major FY 2005 Publications B. Marion, J. Adelstein, K. Boyle, H. Hayden, T. Fletcher, S. Canada, D. Narang, A. Kimber, L. Mitchell, G. Rich, and T. Townsend, “Performance Parameters for Grid-Connected PV Systems,” 31st IEEE PV Specialists Conference, January 2005. J. Adelstein and B. Sekulic, “Performance and Reliability of a 1 kW Amorphous Silicon Photovoltaic Roofing System,” 31st IEEE PV Specialists Conference, January 2005. A. Lester and D.R. Myers, “A Method for Improving Global Pyranometer Measurements by Modeling Responsivity Functions,” submitted to Solar Energy, 2005. D.R. Myers, “Solar Radiation Modeling and Measurements for Renewable Energy Applications: Data and Model Quality, Energy, Vol. 30(9), 1517-1531 (2005). D.R. Myers et al., “An Update on Reducing the Uncertainty in Solar Radiometric Measurements,” SOLARIS 2005, 2nd International Conference on Advancements in Solar Radiation Measurements and Models, Kormos Publications, Athens, Greece. I. Reda et al., “Using a Blackbody to Calculate Net-Longwave Responsivity of Shortwave Solar Phyrnometers to Correct for their Thermal Offset Error during Outdoor Calibration Using the Component Sum Method,” J. of Atmospheric and Oceanic Technology, Vol 20, 1531-1540, 2005. D.R. Myers et al. “Analysis of Broadband Model Performance for an Updated National Solar Radiation Database in the United States of Photovoltaic R&D Technology Development 75

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