The authors of this report analyze the success of the solar home system program in Bangladesh, which provides clean reliable electricity to more than 16 million people in off-grid areas. The report describes the impact and benefits of the program as well as various components of the adopted technology, warranties, and disposal aspects. It also highlights the price fluctuations of its components in the global market. The authors outline how the program's business model was the main success factor for its immense scalability. The final section of the report reviews the business model of the program, its current challenges and other renewable energy applications.