Nigeria, July 23 -- Nigeria has emerged as sub-Saharan Africa's fastest-growing market for small-scale solar systems, but weak investment in utility-scale renewable energy projects is preventing the country from translating the boom into large-scale improvements in electricity supply.

These are the central findings of a new report published by BloombergNEF (BNEF) on Wednesday. The report, titled "Sub-Saharan Africa Renewable Energy Market Outlook", projects that Nigeria will dominate the region's small-scale solar additions through 2035, while South Africa will remain the continent's leader in utility-scale renewable energy deployment.

The findings underscore the contrasting paths African countries are taking in the energy transition, w...