Inaccurate state of charge (SOC) measurements can cost battery energy storage system (BESS) operators up to 15% in lost revenue, a persistent issue despite advances in monitoring technology.

Update 2 October 2026: The financial impact of the write-down to Wärtsilä’s full-year 2026 is expected to be significantly less than initially communicated.

North American Electric Reliability Corporation (NERC) issued its most urgent grid reliability warning in response to artificial intelligence data centres causing massive, near-instantaneous power fluctuations.

Speaking to ESN Premium, Kashish Shah of Wärtsilä explains why Australia’s volatile market structure makes it uniquely suited for battery storage.

Wärtsilä has brought the 150MW/300MWh Bungama BESS online in South Australia, for owner and operator Revera Energy.

Wärtsilä spinning out its energy storage activities and divesting a 50% stake this week reflects difficulties in making the business profitable and synergistic within the wider group activities, analysts said.

There has been another twist in the long-running saga of Wärtsilä’s energy storage business and how the company aims to run it going forward.

Energy-Storage.news Premium speaks with Scott Blalock, general manager, integrated applications engineering, at BESS integrator Wärtsilä Energy Storage.

“Australia remains a multi-gigawatt proving ground for utility-scale energy storage systems,” says Kashish Shah of Wärtsilä Energy Storage.

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