Abstract
Battery Energy Storage Systems (BESS) at grid scale are critical as South Africa transitions to a more resilient and renewable based power system. While BESS have technical advantages, they are financially constrained due to high capital costs, operational costs, and exposure to market and regulatory risks. This study examined the cost structure; lifecycle expenditures and the financial risks associated with implementing grid scale BESS projects in South Africa through use of a Life Cycle Cost Analysis (LCCA). The qualitative research approach used for this study included semi-structured interviews with twelve industry professionals to analyse the cost drivers and risk dynamics over the lifecycle of a BESS. Results showed that battery procurement, power conversion systems and balance of plant components accounted for most of the capital expenditures (CAPEX), and that procurement of batteries represented over 50% of these expenditures. The primary financial risks associated with developing BESS are market volatility, supply chain disruption, technological uncertainty, and evolving regulatory requirements. LCCA proved useful for identifying long term cost exposures for all aspects of the BESS lifecycle, including procurement, installation, operation and maintenance, and disposal, thereby enhancing the ability to accurately forecast costs and provide informed investment decision making. Although there were limitations related to the availability of localized cost data and the sample size was limited to twelve industry professionals, the study provided a contextualized cost-risk perspective for BESS development in South Africa. Incorporation of LCCA into project governance frameworks will assist in reducing financial uncertainty and promoting sustainable growth in BESS development in South Africa's changing energy environment.