Managers of the UK’s largest BESS owner-operator Gresham House Energy Storage Fund (GRID) discussed recent investment news and future strategy this week. 

RWE has received official sign-off from the AEMO and Transgrid to operate Australia’s first 8-hour BESS at full capacity.

Australia has emerged as the world’s third-largest utility-scale battery energy storage market, with 4.3GW of large-scale battery storage systems reaching financial close in 2025.

Australia’s New South Wales (NSW) has opened two tenders seeking 2.5GW of renewable energy generation and 12GWh of long-duration energy storage, marking the largest generation procurement in the state’s history under its Electricity Infrastructure Roadmap.

Two battery energy storage system (BESS) companies, Eos Energy and ESS Tech Inc, are betting big on the US adoption of long-duration energy storage (LDES) in Q1 2026 financial reports.

In this interview with ESN Premium, Keith Lovegrove of ITP Thermal warns that Australia’s energy storage sector risks over-reliance on lithium-ion batteries.

What are the system needs that LDES is going to solve, and what technologies are most appropriate for those applications?

Francesco Oppici, co-founder and CCO of Carbon dioxide-based long-duration energy storage (LDES) company Energy Dome tied the commercialisation path of LDES to data centres.

Update 28 April 2026: Following publication of this story, Hydrostor reached out to clarify some of the conditions detailed below and provided a statement.

How much long-duration energy storage (LDES) does the UK system need, is the government’s cap-and-floor the right way to procure it, and what does the long-term picture look like?