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performance

FlexGen claimed its customers maintained 98% annual availability across their BESS projects, with 99.7% uptime for assets affected by Winter Storm Uri. Image: FlexGen
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Availability: Why this BESS performance metric matters so much, and how to calculate it

September 30, 2026
Liam Critchley with an ESN Premium deep dive into availability, one of the most-discussed metrics in battery storage performance.
ACCURE CEO Kai-Philipp Kairies (left) speaking at the Energy Storage Summit 2024 in London, UK. Image: Solar Media

‘No one cares about analytics. They care about outcomes.’: ACCURE on US BESS performance

March 19, 2026
Energy-Storage.news speaks to Dr. Kai-Philipp Kairies, CEO and co-founder of ACCURE Battery Intelligence, ahead of the upcoming Energy Storage Summit USA 2026.
Image: AGL-Wärtsilä.
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Australia’s battery storage fleet ‘facing challenges in extreme heatwave conditions’

January 9, 2026
Javier Savolainen of Wärtsilä explains how Australia’s battery storage and pumped hydro fleet have been impacted by the current heatwave.
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