Cost and market analysis of integrative lightweight PV systems for low-slope commercial rooftops

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.