Chapter 5: Investments in Solar Energy Technologies
5. Investments in solar energy technologies This chapter presents the benefit-cost analysis of the DOE’s investments in Photovoltaic Energy Systems. As reviewed in Chapter 4, the DOE helped the US PV industry in the development, scale-up, and maturation of core PV technologies and manufacturing processes. Benefits accrued directly to PV module producers and consumers in the form of increases in product quality, operational efficiency, reliability, and reductions in production costs. Following methodologies pioneered by Griliches (1958) and Mansfield et al. (1977), economic benefits were quantified by comparing actual technological progress to counterfactual scenarios under which DOE technical expertise, technology infrastructure, and financial support were not available and PV module companies pursued their technology R&D strategies without DOE support. Our approach was to conduct primary and secondary research on technology advances in photovoltaics funded or co-funded by the DOE and ascertain how, when, or if those advances would have been made in the absence of the DOE’s programs. This process defined the next best alternative against which economic benefits were measured and, definitional to this approach, established attribution to the DOE. Where technical accomplishments may have economic impacts outside the PV market, such as the accelerated adoption of wire saw technology in the semiconductor industry or processes for refining high-grade silicon, these externalities were also included in the quantitative analysis. OVERVIEW OF THE BENEFIT-COST ANALYSIS Within the Photovoltaic Energy Systems cluster, the technologies of focus were those that supported the development of c-Si and thin-film modules, including R&D for...
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