Conventional energy technologies and deployment approaches cannot be relied upon to eliminate energy poverty in Africa. Innovations in energy access are necessary. Previous attempts at introducing and scaling up innovative solutions do not sufficiently address dynamic and structural determinants of success. This limits their actual performance as scalable drivers of innovations in technology, policy and institutions. Using technological innovation systems theory, we demonstrate a practical approach to assess the sustainability of innovations in energy access, and develop a framework to guide energy policy makers, clean energy entrepreneurs and energy-development researchers. (C) 2012 Elsevier Ltd. All rights reserved.