Global system integrator Fluence has been hit by a cross-complaint by the owner of the Diablo battery storage project in California, which is seeking a US$230 million refund for Fluence’s engineering, procurement and construction (EPC) work on it.

Our mid-year series continues with a look back at all 12 Guest Blogs published during the first six months of this year.

Charley Grimston from battery storage insurance firm Altelium compares the sector’s development with the early stage of the wind market.

Enervenue has completed UL9540A tests for its nickel-hydrogen cells, units and systems and obtained UL1973 certification.

Analyst Oliver Forsyth from IHS Markit explains exactly how things are changing in BESS system integration.

Investors in large-scale battery projects are recognising the power of software, argues Steve Hanawalt of Power Factors.

Seasoned renewable energy lawyer Adam Walters from Stoel Rives argues that procurement in the battery storage space is currently like a sort of Wild West.

ESS Inc, currently the only maker in the world of a commercially available flow battery using iron electrolytes, will deploy an energy storage system with more than six hours duration to a microgrid in Chile.

What are the best ways to match up long-duration energy storage technologies to applications and revenues? And what is ‘longer-duration’ storage and when will we need it? Florian Mayr and Dr Fabio Oldenburg at Apricum – The Cleantech Advisory offer some perspectives.

Updated 7 January 2020: Contemporary Amperex Technology Ltd (CATL) will supply lithium-ion batteries to energy storage system integrator FlexGen for two large-scale energy storage projects totalling 220MWh in Texas.