Solar Energy Technologies Program

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Solar Energy Technologies Program ( solar-energy-technologies-program )

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4.1.1.3 Key Technical Challenges The key technical challenges for flat-plate PV systems are to: • Reduce the cost of material used in the manufacture of modules through reduced material requirements and improved material usage. • Improve processes and in-line diagnostics to enable increased throughput and yield for module production. • Improve system reliability by improving related module and power-conditioning lifetimes. • Improve system conversion efficiencies through both higher-performance cells and reduced system losses. • Improve the quality of installed PV systems through system modeling that will identify both essential and high-impact R&D areas. • Support the development of codes, standards, and certification programs necessary for a mature and established infrastructure. Technical Targets As with the objectives above, the technical targets and the specific PV technology depend on timing and application. The systems-driven approach will be used to further analyze the market-driven differences in various applications. The following three tables (4.1.1-1 through 4.1.1-3), which present targets developed for flat-plate PV, demonstrate anticipated characteristics for the 2-MW utility-scale application, the 2- to 3-kW grid-connected residential application, and the 2 to 3-kW grid-connected application with storage. Table 4.1.1-1. Targets for Flat-Plate PV Systems in Large Utility-Scale Applications (2-MW example) System Element Units 2003 2007 2020 Design $/Wac 0.10 0.08 0.02 $/Wp,dc 3.60 2.50 $/Wp,dc 3.00 1.65 1.00–1.50 0.33–0.50 Module Price Direct cost/power Conversion efficiency Direct cost/area Inverter Price Other BOS $/Wac 0.40 0.25 0.15 Installation $/Wac 0.60 0.40 0.10 % 8 12 15 $/m2 240 200 $/Wac 0.60 0.40 0.25 % 94 96 97 Replacement Years 5 10 20 DC-AC conversion efficiency INSTALLED SYSTEM PRICE $/Wac 5.30 3.60 Lifetime Years 20 20 30 1.50–2.00 System Efficiency % 6 9 12 Degradation O&M cost LEVELIZED ENERGY COST Considerations: %/Yr 2–3 2–3 1 $/kWhac 0.03 0.02 0.005 $/kWhac 0.24 0.15 0.05–0.07 50–75 LEC is cost to utility to provide electricity with PV system. LEC is dependent on solar resource (2500 kWh/m2/yr used for lower case on 2003 numbers). O&M: inverter maintenance contract; 5-yr replacement; 15-yr replacement. Design: One-person month. Solar Energy Technologies Program Multi-Year Technical Plan 50

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