Battery Energy Storage Systems (BESS): The Linchpin for Grid
This report explores the current status, diverse applications, and significant growth trajectory of BESS in the South African context.
An investment model that covers grid load and technical problems in coal-fired generation plants is developed in this study to incorporate three BESS applications; peak-load shaving, load-levelling and maintenance-deferral. The study focuses on the southern Africa region and looks at the Gauteng and Mpumalanga provinces of South Africa.
BESS improves overall grid eficiency by reducing technical losses associated with long-distance power transmission. It can locally dispatch stored energy, reducing the necessity for extensive energy transfers and infrastructure upgrades.
Experience in the African context is even more limited with very few grid-scale BESS projects that are operational. As an emerging technology it is expected that technical performance will continue to mature and improve. Already, rapid and significant improvements have been seen across most performances metrices.
Among the commercial technologies, lithium-ion batteries are best known. They have been the dominant technology for grid-scale applications, representing almost 60% of global grid-scale BESS deployments in 2021.
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