Rapid recent progress at the 1.8GW-capacity Benban solar park in southern Egypt could see online capacity top 1GW by end-2019, up more than 20-fold on the end-2018 figure. But lower tariffs for developers threaten further gains.

Progress at the massive Benban solar park in southern Egypt has been rapid in recent months. A year ago only a single plot had panels installed. But latest satellite photography indicates that as of late March, 23 of the 40 plots were largely or wholly covered with...