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Program, authorized funding for the High- Reliability Inverter Initiative (HRII), to be managed by SNL. The initiative focused on improving the reliability of inverters for PV applications from an average MTBF of 2–3 years to an MTBF of greater than 10 years. SNL engineers were keenly aware that, in addition to technical advances and innovative thermal management, a key approach to higher reliability was mass production of well-designed hardware. Thus, all HRII bidders for were required to provide detailed marketing and manufacturing plans for high volume (>10,000 units per year). Also, based on today’s limited PV module-manufacturing capabilities (slightly less than 100 MW shipments of PV modules in 2001, which translates to ~33,000, 3-kW inverters if every module found its way to that application), it was obvious that inverters with synergistic applications were also a key to mass production and quality control. In keeping with cross-technology guidelines issued by DOE, the first phase of the HRII was co-funded by the DOE Solar Program, the Energy Storage Program, and the Distributed Energy Resources (DER) Program. Reorganizations at DOE and severe funding shortfalls in Energy Storage and DER resulted in a loss of the cross-technology collaboration for Phases II and III of the HRII. The technical approach for this work follows the Systems-Driven Approach (SDA), which is a methodical process by which technology development efforts are driven by well-defined and well-documented requirements based on analyses of present and potential markets, technology trade-off studies, and R&D reviews. All technical targets for R&D for the components and systems that are funded through the Solar Program are derived from a common market perspective and national energy goals, and the resultant technologies are tested and validated in the context of established criteria for each market. The EERE mission, which follows, was the top priority for all work undertaken under this project. EERE Mission. Strengthen America’s energy security, environmental quality, and economic vitality through public-private partnerships that: enhance energy efficiency and productivity; bring clean, reliable, and affordable energy production and delivery technologies to the marketplace; and make a difference in the everyday lives of Americans by enhancing their energy choices and quality of life.In addition, the Solar Program goals are mirrored in the goals of the Inverter and BOS Development Project. Inaddition,theSolarProgramgoalsaremirrored in the goals of the Inverter and BOS Development Project. Solar Program Goal. To improve performance of solar energy systems and reduce development, production, and installation costs to competitive levels, thereby accelerating large-scale usage across the nation and making a significant contribution to a clean, reliable, and flexible U.S. energy supply. A key feature of the SDA is the identification of market-based technical/economic requirements, which is also a focus of the inverter workshops. Rigorous systems analyses are used to assess the impacts of improvements related to targets established for identified markets. This analysis applies to R&D conducted at fundamental levels for devices and applications (longer term) and more applied levels (nearer term). The analyses are also used to assess the benefits of R&D efforts and related technologies relative to cost and to determine go/no-go (stage-gate) decision points. Data are collected from laboratory and fielded systems to continually reassess goals, targets, progress, and critical technology paths. Coordination with industry and potential users of the technology is a key ingredient in ensuring that the product meets the needs of the market. Ultimately, new technologies will graduate to the commercial marketplace through partnerships with industry. Task Title High Reliability Inverter Initiative Inverter Development and Manufacturing R&D 3. Results and Accomplishments FY 2005 Budget ($K) 1643 355 67 General Electric and Xantrex delivered Phase II prototypes of high-reliability inverters to SNL in FY 2005. Benchmark evaluations and validations were completed at SNL’s Distributed Energy Technologies Laboratory (DETL) as part of the Inverter Development and Manufacturing R&D Project, and SNL engineers recommended improvements. Each contractor made changes, and the upgraded prototypes were then re- evaluated before contractors moved on to the Phase III (commercialized product). Each contractor provided an overview of its inverter development program for the Phase II report. Photovoltaic R&D Advanced Materials and DevicesPDF Image | DOE Solar Energy Technologies Program
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