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A lightweight PV (LPV) system that weighs less than 2.5 pounds per square foot (psf), designed for the membrane-based commercial rooftop market, effectively reduces installed system costs by 10% when compared to traditional racked and ballasted systems. By focusing on key cost reduction areas, LPV minimizes hardware, labor, and permitting costs. The system utilizes next-generation rigid CIGS modules to maximize electrical performance and minimize roof load. Simulation studies indicate that the use of CIGS modules will provide 10% more energy at the inverters as compared to equivalent c-Si modules. The U.S. Photovoltaic Manufacturing Consortium (PVMC) is conducting a time-and-motion study to accurately evaluate installation labor and identify additional cost reduction opportunities.

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DiSTf!!BUXON OF THlS 03CUhENT IS UNLIMITED v\ 1 * The use of residual geothermal heat instead of residual condenser heat is a significant distinction between geothermal power plant waste heat usage and t h a t from coal or nuclear plants. The geothermal heat a t 130" to 2 O O O F or above from the heat exchanger or flasher discharge represents an inexpensive form of thermal energy by as much as a factor of three compared t o gas-fired h i g h temperature steam. discharge from coal, nuclear, or geothermal plants have similar temperatures, i n the range of 1OOOF. practical use, except for nearby space heating.