South Africa’s biggest city plans to seek at least R3.8-billion in investment in solar and gas-fired power as well as battery storage to improve electricity supply. The City of Johannesburg will issue a request for information for the construction of a 150-megawatt solar plant, 50 megawatts of rooftop solar panels and the refurbishment of an idle gas-fired plant that could generate 20 megawatts in September, the municipality said in a presentation on Thursday. It will also seek information for the installation of 100 megawatts of battery storage.