The goal of this report is to inform investors about the market potential of the clean energy industry serving India"s rural bottom of the pyramid (BoP) market, by looking at its opportunities, challenges, and potential paths to growth. The report presents an overall picture of these growing clean energy sectors, rather than to provide investment advice on individual companies. The potential opportunity for investors in the Indian clean energy market for the rural BoP is significant. The aggregated potential market for the four sectors studied in this report to be INR 97.28 billion (US$2.11 billion) per year, including INR 94.06 billion (US$2.04 billion) for decentralized renewable energy services and INR 3.22 billion (US$70.1 million) for energy products per year. The analysis shows that clean energy services and products may require an upfront investment three to ten times greater than that for conventional energy sources such as kerosene and firewood, which often are subsidized or free to India"s rural consumers. Yet despite these and other drawbacks, the average annual gross revenue of the companies profiled in this report has grown 36 percent since 2004.