Without access to energy, hundreds of millions of people across the African continent are limited in terms of business, education and development. A budding renewable technology boom could turn this upside down. Some 600 million people in rural Africa lack access to electricity. In Malawi, where 90% of the population is off the energy grid, an untapped resource is gaining relevance: an average of seven hours of sunshine per day. With improved solar technology and falling prices, the country, and the entire continent for that matter, might be ripe for a new technological jump.