Eskom to commission their first big battery energy storage system in Western Cape

Please note that the Hex Battery Energy Storage System (BESS) official opening, which was scheduled for Friday, 27 October 2023, has been postponed to 09 November 2023 – Eskom

  • Eskom will offically commissioned the Hex Battery Energy Storage System (BESS) at Worcester in the Western Cape on 27th October 2023 which has 20MW output and 100MWh capacity. 
  • The project is the first to be completed under Eskom’s flagship BESS project announced in July 2022 to help to alleviate the pressure on the national electricity grid. Read more
  • The Hex site can store energy which is enough to supply a town such as Howick for 5 hours.

Eskom has installed the BESS to provide ancillary support in terms of enhanced frequency control of the network, reactive power support and improved quality of supply performance near existing Distributed Generation Renewable Energy plants. The Battery Storage technology may enable the immediate levels of constraint to be addressed and provide continued access to potential customers to these networks.

The battery storage technology will also improve the quality of supply and mitigate voltage related concerns on the networks. It can also enable some significant strengthening investments to be deferred, whilst providing a reliable and effective interim solution to the problems faced on the Distribution Networks.

Electricity generation from renewable sources is limited by the intermittency and variability of wind and solar resources, i.e. when wind blows and sun shines. Energy storage allows for the storing of electricity for later use even when the renewable resource is unavailable. The process involves the conversion of electrical energy into another form of energy such as chemical or kinetic energy, store it temporarily and then converted back to electrical energy, therefore giving the utility considerable flexibility and control.

Author: Bryan Groenendaal

1 Comment


    It will be an exciting moment to observe the commissioning of the BESS in this site, hence I would appreciate to get an invitation to such a special event. As a mechanical Technician such moments are enjoyable.

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