SELCO Foundation is an open-source platform that designs, implements, and disseminates sustainable livelihood innovations through an ecosystems approach. It aims to (1) pioneer and build an ecosystem to enable innovations that link sustainable energy and poverty reduction, (2) develop poor-centric solutions addressing technology, financial, and social aspects for holistic solutions, and (3) help other areas develop customized solutions for heterogeneous poor segments. SELCO recognizes the need to customize solutions for different income groups and addresses misplaced assumptions about one-size-fits-all approaches. It takes a desirability, viability, and feasibility approach through community engagement and collaboration to co-design appropriate energy and livelihood solutions.