This knowledge note is the second of three case studies that concerns scaling up access to electricity in Africa, Bangladesh, and Rwanda. Since its inception in 2003, Bangladesh's solar home system program has installed about three million electrification systems in rural households, two-thirds of them in the last three years. The program is the most dynamic off-grid electrification program in the world, benefitting more than 15 million people and contributing about 130 MW in renewable energy generation capacity.