Rolls-Royce to install one of the largest battery storage systems in Latvia

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German manufacturer Rolls-Royce has received an order from the Latvian transmission system operator Augstsprieguma tikls (AST) to supply an mtu large-scale battery storage system with an output of 80 megawatts (MW) and a storage capacity of 160 megawatt-hours (MWh) to secure the Latvian power grid.

“We are proud to be able to make a significant contribution to this important and safety-critical project in Latvia,” said Dr Jörg Stratmann, CEO of Rolls-Royce Power Systems. “Our battery solutions, which belong to our strategic business fields, make a sustainable and reliable contribution to energy security worldwide. The facility for Latvia will be our largest battery storage system to date.”

This system will be one of the largest battery storage systems in the EU. The order also includes general contractor services as well as installation and commissioning. The battery system will be used as of fall 2025 at two locations – a 20 MW/40 MWh battery storage at the AST substation in Tume and a 60 MW/120 MWh battery storage at the AST substation in Rezekne.

The state-of-the-art battery system will provide the fast and automatically activated frequency regulation reserves needed for the synchronisation mode, where the Baltic power transmission systems operate in sync with the continental European grids. The battery system will provide power reserves at significantly lower costs than the existing conventional power plants. Rolls-Royce and AST have signed a 5-year Long-term Service agreement for the system.

“The battery storage systems are very important for our future energy system,” commented Rolands Irklis, Chairman of the Management Board of AST. “I am delighted that it is being supplied by one of the world’s most renowned manufacturers of energy storage systems.”

“In addition to battery container solutions, Rolls-Royce supplies these mtu EnergyPack QG large-scale storage solutions, which consist of modular units for capacity and power and can be flexibly configured to any size,” explained Andreas Görtz, President of Sustainable Power Solutions at Rolls-Royce Power Systems. “We look forward to working with AST and appreciate the trust that the Latvian transmission system operator has placed in us.”

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