In the case of mini-grid and off-grid generation, more than 90% is provided by renewables. According to the WEO-2011, more than 60% of the additional investment required to provide universal access to electricity by 2030 is in sub-Saharan Africa. There is greater dependency here on mini-grid and isolated off-grid solutions, particularly in countries such as Ethiopia, Nigeria and Tanzania, where a relatively higher proportion of those lacking electricity are in rural areas. A recent review of the economics of renewables in SSA shows that when considering sparsely populated rural areas, the economics of localised renewables can be favourable compared to grid expansion, leading to the conclusion that decentralised wind power could already be cost-competitive in large regions in countries such as Ethiopia, Ghana and Kenya (Deichmann et al.,