On a candid level, environmental policies don't really matter in the case status of Africa for renewable energies.
The use of sustainable energy sources in Africa is mostly in order to curb the costs of electricity distribution.
90% of the population is concentrated in less than 21% of the land surface and the average per-person travel time to settlements of more than 50,000 inhabitants is around 3.5 hours, with Central and East Africa displaying the longest average travel times.
If this ratio was greater, then it would be of greater concern.