1.2 billion people lack access to reliable electricity. Over the past decade, companies have designed innovative solutions to improve energy access around the world. Technologies ranging from small solar home systems to larger mini-grids are being deployed in Sub-Saharan Africa and in other developing countries to bring power to all. Can off-grid solutions provide clean, reliable power to customers around the world? Can renewable mini-grids leapfrog the traditional large power plants that require grid extension? What roles do the private sector and international institutions have to play in rural electrification?