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BW ESS, Penso Power sign seven-year tolling agreement with Shell for UK’s Bramley BESS

Energy storage operator BW ESS and developer Penso Power have secured a seven-year tolling agreement with Shell for their Bramley Battery Energy Storage System (BESS) in Hampshire, UK. This marks the UK’s first long-term tolling agreement for a single BESS asset, potentially setting a new revenue model for future energy storage projects across Europe.

Under the agreement, Shell will manage the trading of the 100MW/330MWh Bramley BESS in various ancillary services and wholesale markets, providing BW ESS and Penso Power with a fixed fee. Currently under construction, the Bramley BESS is the first in Europe to utilize Sungrow’s PowerTitan 2.0 liquid-cooled system, which integrates a 2.5MW power conversion system and a 5MWh battery into a compact container.

The Bramley site is slated for commissioning in Q4 2024 and will be the UK’s longest-duration BESS.

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