RWE continues to expand its battery storage technology business. The company has finalised its investment decision for a 220 megawatt battery storage project in Germany. A total of 690 lithium-ion batteries blocks are to be installed at the sites of RWE’s power plants in Neurath and Hamm in North Rhine-Westphalia. The total investment amounts to approximately 140 million euros. Subject to the pending building permit, construction is scheduled to start in 2023, with commissioning planned for 2024.The new system is designed to react within seconds, delivering the required output for over an hour. This allows the system to contribute to the efficient stabilisation of the grid with a reliable power supply. The unique feature of the system is that the new battery is networked virtually with RWE’s German power plants. This enables optimal management in terms of which unit efficiently provides balancing energy, either individually or as a group, and when. RWE leverages its energy storage technical capabilities by providing detailed project design, modelling, system integration and commissioning.RWE plans to implement this storage project at existing power plants to maximise the synergy effects across technologies. The batteries can be installed in the areas that are already available, utilising existing grid infrastructure to feed energy in and out.In Neurath, batteries with a total capacity of 80 MW are to be installed on an area of around 7,000 m², which is the equivalent of about one football pitch. And batteries with a total capacity of 140 MW are to be installed in Hamm at the Westfalen power plant, covering an area of 14,000 m². The company plans to use brand new lithium-ion batteries which are installed in cabinet form, and delivered as prefabricated modules.Battery storage systems are an essential part of the energy transition because they store the leftover electricity resulting from overproduction in the grid and make it available again when it is needed. As one of the leaders of the energy transition, RWE develops, builds, and operates battery storage systems in Europe, Australia and the Americas.