Eelpower Energy acquires Silkstead battery storage project from Balanced Grid Works

Type: Acquisition · Technology: Storage · Country: United Kingdom · Capacity: 50 MW · Announced: 2026-09-04

Eelpower Energy has acquired the 50 MW / 200 MWh Silkstead battery energy storage project near Winchester from Balanced Grid Works. The Silkstead BESS is located south-east of the Winchester substation and is scheduled to enter construction in 2027, with commercial operations expected to begin in 2028. This acquisition is Eelpower Energy's fifth asset purchase since its launch in September 2025, contributing to its plan to invest £500 million in battery storage projects across Great Britain and target a portfolio exceeding 1 GW. The deal underscores Eelpower Energy's commitment, backed by Equitix, Aware Super, and the National Wealth Fund, to invest in infrastructure for a cleaner, more flexible, and resilient electricity system.

Analysis

Eelpower Energy has acquired the 50 MW/200 MWh Silkstead battery energy storage project near Winchester from Balanced Grid Works, with construction slated for 2027 and commercial operation expected in 2028. Eelpower Energy, launched in September 2025, has completed five asset purchases and aims to invest £500 million in UK battery storage to build a portfolio exceeding 1 GW. Equitix, a London‑based infrastructure investor, manages $13.8 billion of assets across 24 countries and backs the transaction. Aware Super, an Australian superannuation fund with over $200 billion in assets for 1.2 million members, is also a backer of Eelpower Energy. The acquisition was announced on 4 September 2026.

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