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470 PHOTOVOLTAIC CONCENTRATORS<br />

Figure 11.14 The Black & Veatch conceptual design for a high-concentration photovoltaic array.<br />

(Copyright © 1984. Electric Power Research Institute. AP-3263. Conceptual Design for a<br />

High-Concentration (500X) Photovoltaic Array. Reprinted with permission)<br />

Figure 11.15<br />

Static concentrator formed by an oil-filled CPC with bifacial cells<br />

years of research were required to develop a UV-stable interface that had sufficiently low<br />

surface recombination velocity [31].<br />

In 1989, EPRI decided to have a contract solicitation to continue commercialization<br />

of high-concentration systems. Two companies, SunPower Corporation and MACom/Phi<br />

(later spun out into a start-up called Amonix), were awarded contracts. SunPower explored<br />

reflective optics using parabolic dishes as well as heliostats [32] and Amonix continued<br />

the development of Fresnel modules using a simplified approach, the integrated backplane

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