Off-grid solar (OGS) energy provides an opportunity to increase energy access. Technology costs have fallen dramatically, and new business models, such as pay-as-you-go (PAYG), are addressing longstanding issues of affordability. More than 130 million OGS devices were sold between 2010 and 2018, with sales increasing at a compound annual rate of about 60 percent. Geospatial modeling by the International Energy Agency (IEA) suggests that 54 percent of Africans currently lacking electricity access could best be served by off-grid solutions, primarily solar (IEA 2017).
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