In 2013 renewables accounted for five percent of the continent's needs but this figure could reach 22 per cent over the next 15 years, IRENA said in its "Africa 2030" report, which sets out a "roadmap" for the transition to clean power.
IRENA says Africa's energy production must double and its electricity production triple to keep up with the pace of development and meet demand. The continent's economic growth is picking up speed but energy shortages are a problem.
Solar energy can be developed across the whole continent, while biomass and hydroelectric offer potential in central and southern areas, the report said.
Wind is primarily of interest to the north, east and south, while the Great Rift Valley in the east has significant geothermal potential.
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With the cost of the technology falling, renewables appear to be the most economic option in a growing number of situations, IRENA said, but developing and expanding capacity in power distribution infrastructure will need investments averaging USD 70 billion a year between now and 2030.
This would lead to savings of at least USD 20 billion a year, mainly in reduced healthcare costs by improving the air quality in homes.
IRENA urged governments to create conditions that would help promote the use of renewables through a better regulatory framework and boosting investment.