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Energy Storage Platform Backed by Stonepeak and CHC Secures 348 MW BESS Projects in Japan
The energy storage platform established by Stonepeak and CHC has secured 20-year fixed revenue contracts for five BESS projects totalling 348 MW in Japan's latest Long-term Decarbonisation Auction.
May 05, 2025. By Mrinmoy Dey

The energy storage platform jointly established by Stonepeak and CHC has announced that it has secured 20-year fixed revenue capacity market contracts for five battery energy storage system (BESS) projects totalling 348 MW of gross capacity in the latest round of Japan’s Long-term Decarbonisation Auction.
The contracts represent the Platform’s second consecutive win in the government tender, following the inaugural Auction in 2024, in which the Platform was awarded contracts for four BESS projects totalling 131MW, the company said in a statement.
Pursuant to the terms of the Auction, the Platform will enter into capacity market contracts with the Organisation for Cross-regional Coordination of Transmission Operators, Japan (OCCTO) for the five awarded BESS projects, thereby formalising the 20-year government offtake agreement, and will continue progressing with late-stage development to prepare the BESS projects for construction and operations.
Commenting on the development, Ryan Chua, Senior Managing Director at Stonepeak said, “We are delighted with the results of the latest Long-term Decarbonisation Auction, which position the Platform well to continue supporting grid stability and reliability while facilitating Japan’s carbon neutrality objectives. We are grateful for the consideration of the Review Committee throughout this process. We look forward to continuing to work with CHC to further the Platform’s strong position in Japan’s energy storage market.”
Ahmed Al-Awa, Director at CHC added, “CHC is pleased with the Platform's success in the latest Auction round, which highlights the value we bring to Stonepeak as a trusted partner and reinforces CHC’s commitment to the ongoing development of battery energy storage projects in Japan. CHC looks forward to continuing to play a major role in the development of the Japanese BESS market and supporting Japan in meeting its energy transition goals.”
The contracts represent the Platform’s second consecutive win in the government tender, following the inaugural Auction in 2024, in which the Platform was awarded contracts for four BESS projects totalling 131MW, the company said in a statement.
Pursuant to the terms of the Auction, the Platform will enter into capacity market contracts with the Organisation for Cross-regional Coordination of Transmission Operators, Japan (OCCTO) for the five awarded BESS projects, thereby formalising the 20-year government offtake agreement, and will continue progressing with late-stage development to prepare the BESS projects for construction and operations.
Commenting on the development, Ryan Chua, Senior Managing Director at Stonepeak said, “We are delighted with the results of the latest Long-term Decarbonisation Auction, which position the Platform well to continue supporting grid stability and reliability while facilitating Japan’s carbon neutrality objectives. We are grateful for the consideration of the Review Committee throughout this process. We look forward to continuing to work with CHC to further the Platform’s strong position in Japan’s energy storage market.”
Ahmed Al-Awa, Director at CHC added, “CHC is pleased with the Platform's success in the latest Auction round, which highlights the value we bring to Stonepeak as a trusted partner and reinforces CHC’s commitment to the ongoing development of battery energy storage projects in Japan. CHC looks forward to continuing to play a major role in the development of the Japanese BESS market and supporting Japan in meeting its energy transition goals.”
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