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.

Long-duration energy storage (LDES) developer-operator Hydrostor intends to enter its compressed air storage project into Ontario, Canada’s recently announced LDES procurement.

South Africa’s TSO Eskom and energy storage technology firm Energy Vault have partnered to deploy projects using the latter’s gravity-based technology.

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.

Organic flow battery company CMBlu Energy has closed a €50 million (US$58.76 million) Series C financing with participation from Samsung Ventures.

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

We catch up with James Mills, managing director of UK BESS investor Adaptogen Capital, about UK market dynamics, its expansion into Europe, and BESS capex in 2026 and beyond.

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?