South Africa’s ideal power system – which is cost-effective and has the lowest greenhouse gas emissions – consists of solar PV, wind and battery storage. But the capital requirements for such a system ranges between R2.3-trillion and R3.1-trillion, according to a report by the National Business Initiative (NBI). NBI, in association with shareholder activism association Just Share and the World Wide Fund for Nature (WWF-SA), released the report Climate Change Investment and Finance Opportunities in The South African Electricity Sector on Wednesday.