Zenobē has acquired the Branxton battery energy storage project in East Lothian, Scotland, from EastCoastGridServices, a project vehicle linked to GridCodePower. The deal closed in early April 2026. The project is located near Thorntonloch, around 8 km south-east of Dunbar, close to the proposed Scottish Power Transmission 400 kV Branxton substation.

The signal is clear: UK BESS M&A is shifting toward large, grid-adjacent assets with transmission access and system-balancing value. Branxton’s export capacity has not been formally confirmed, but transmission data indicates a 750 MW allocation at the substation for May 2029.

The site spans 11.6 hectares and includes indicative plans for 278 battery containers, 278 inverter units, medium-voltage control buildings, client control buildings, auxiliary transformers, and a 400 kV transformer and switchgear compound. Construction is expected to take 12–18 months, with operations likely in 2029.

Zenobē’s acquisition follows rising investor appetite for UK storage platforms and late-stage BESS projects.

Commercially, Branxton offers more than merchant arbitrage. It is designed for frequency regulation, voltage support, balancing, black-start capability, and system restoration. That makes it valuable as the UK grid absorbs more intermittent generation.

This deal signals that buyers are pricing future grid services and transmission positioning into UK storage acquisitions.

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