Featured in 2025 Unboxed – 02-2025

Go with the flow

There is a gap in the market for long-duration energy storage (LDES), according to US-based manufacturer ESS Inc. – one which can’t be plugged with lithium-ion chemistry. Hugh McDermott, of ESS Inc. tells pv magazine how he thinks iron flow batteries fit into the energy system of the future, as the company pursues global expansion.

By

Matthew Lynas

07 Feb 2025

ESS Inc.’s containerized LDES can be delivered by truck and crane. | Photo: ESS Inc

Think about how the power sector has developed over 150 years. There are peaker and intermediate power plants operating intermittently to meet periods of high electricity demand and there are baseload plants generating continuously. A variety of technology has been deployed to match load profiles. The generation mix is diverse.“It’s horses for courses,” said Hugh …

This article is part of pv+

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