SELCO Solar is a social enterprise in India that provides solar energy products and services to 180,000 households through 41 branch offices. It generates $4 million in annual turnover by selling energy services rather than products, allowing very poor customers to pay around $5 per month for kerosene-equivalent light that costs 20 times less than kerosene. To scale this model, SELCO focuses on building partnerships with banks, investors, and social protection programs to continue targeting the poorest customers with patient capital, brand building, and gradual expansion.