The Negros Women for Tomorrow Foundation (NWTF) is a one of the Philippines’ oldest and largest microfinance institutions, serving nearly 140,000 clients across the nation’s central island region. Among institutional practitioners of energy microfinance NWTF is notable for its inventive, trial-and-error approach to problem-solving and program development, and its patient, long-term commitment to building a strong, high impact and commercially sustainable model. In this episode, Raymond Serios provides a nuts and bolts account of how the MFI draws on experimentation, client feedback and a close study of the evolving clean energy market to adapt and build its successful energy lending program.