Instructive of how renewable energy may diffuse across presently low-income, energy-poor countries is the precedent set by the mobile phone. At the turn of the millennium there were a quarter of a million active mobile phone contracts in Nigeria, far fewer than the 600,000 landline connections. If you said then that access to a phone would be commonplace within two decades – in the absence of costly new infrastructure and with even the spread of electricity remaining mixed – you would have been laughed at.
