Zimbabwe’s power utility ZESA Holdings will no longer charge mining houses tariffs below cost of production as it is struggling to service “ballooning power import debt.” Exporters, such as mining companies, will be charged $0.1063/kWh from August 1, ZESA executive chairperson Sydney Gata said in a letter to miners. Power from diesel-run Hwange plant, which is under expansion to add 300 MW is produced at $0.107/kWh, translating to 12c for customers, he said.