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Abstract
Private equity investment in technologies which deliver low carbon energy has grown as
an area of both economic and social performance. This article offers a perspective on
some of the challenges in the industry. It relies on case studies drawn from thirty five
interviews with leading clean tech investment managers across Silicon Valley, New York
and London. The findings suggest that despite the long-term growth opportunities, some
investors have struggled to find attractive risk-reward premiums in early stage
investments.