Featured in Building resilience – 04-2026

Even flow

Flow batteries remain a niche technology and struggle to compete on an upfront cost basis with lithium-ion (Li-ion). But demand for long-duration energy storage (LDES) solutions from large energy users presents a compelling use case for flow batteries, proponents argue.

By

Blathnaid O’Dea

02 Apr 2026

RKP’s 1 GWh CTG Jimusaer ESS commenced operations in January 2026. | Image: RKP

When it comes to battery bankability, Li-ion is king. Investors favor it for its low upfront costs, good track record, and relative ease to deploy in a variety of different settings, from grid-scale to commercial and residential. Proponents of flow batteries are fully aware of the uphill battle it takes to achieve the level of …

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