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• Continue world-class solar radiometric, and therefore PV system performance, measurements and instrumentation. • Provide PV system performance and reliability data and analysis required by the DOE Solar Program Systems-Driven Approach activities (i.e., benchmarking) and analyses. • Provide robust technical support of important national and International standards, codes, and testing and certification activities, which are needed to assure safe installations that perform as expected, i.e., o Maintain U.S. industry influence on international PV standards. o Continue proactive advances in codes, standards, and certification for PV. o Evolve the Inverter Certification Test Protocol to include economical maximum power point tracking (MPPT) procedures o Work with Industry Forum to have proposed changes accepted for the 2008 National Electrical Code. o Collaborate with UL on impacts on standards of ungrounded PV arrays. o Continue evolving NABCEP tests, study guides, and procedural requirements. o Develop protocol procedures for PV module performance certification. ____________________________________________________________________________________ 1. Introduction Central to this project is the near-term and long- term performance monitoring, characterization, and modeling of emerging-technology, small (<5 kWp), grid-connected, prototype PV systems installed and operating at the NREL OTF. Critical to this effort is a supporting task that provides world-class and traceable measurements and instrumentation for solar radiometry. The resultant precision and accuracy of the PV system (and module) performance measurements is determined by the quality, precision, and accuracy of the measurements of the incident (on the PV arrays) solar irradiance (i.e., “power in”). This project also includes very important activities aimed at supporting the development of industry- consensus/adopted codes, standards, and certification that cover PV systems, components, and installation practices. This project is integral to the DOE Solar Program Multi-year Technical Plan because it provides credible/independent data, analyses, and assessments of the performance and reliability metrics that are required in benchmarking the candidate technologies and supporting the Systems-Driven Approach to R&D management. This project provides leadership and support in creating and implementing codes and standards for safe, high-quality, cost-effective systems. It addresses and reduces technical and institutional barriers to all applications of PV technologies through the collaborative development of codes, standards, and certification procedures—paving the way for a wide variety of PV installations and insuring that interconnect issues with utilities are resolved. 2. Technical Approach The three tasks comprising this project are: Task Title PV System Performance and Standards Solar Radiometry and Metrology Codes, Standards, and Certification FY 2005 Budget ($K) 750 625 282 73 Photovoltaic R&D Technology Development 2.1 PV System Performance and Standards This task provides PV emerging-technology, small grid-connected system performance and reliability data, analyses, and characterizations to the Solar Program and to the participating industry partners. The approach includes producing small PV system performance reports (e.g., electric power produced versus time) on a quarterly basis, delivered to industry partners and internal project managers, providing annual system outputs and degradation rates for each of the technologies/systems. Also, the very popular PVWATTS software (which provides the public with estimates of PV system electrical output and levelized electricity costs for locations in the United States) was slated for upgrade. 2.2 Solar Radiometry and Metrology This task provides world-class and traceable solar radiometric measurements, instrumentation, and metrology required by the PV Subprogram projects. In FY 2005, an important activity included making technical and logistical preparations for participating in the next WMO International Pyrheliometer Intercomparison in October 2005, to maintain standards. traceability to world radiometricPDF Image | DOE Solar Energy Technologies Program
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