Investment bank Citigroup is predicting a 240GW global battery storage market worth US$400 billion by 2030 as increased deployment creates a “virtuous circle” of falling costs.

In a report, 'Dealing with Divergence' on global investment trends for 2015, Citi said it saw battery storage in conjunction with renewable energy systems and smart grids as the “third driver” of demand for rechargeable batteries after consumer electronics and electric vehicles.

Citi said the rapid growth in renewable energy deployment and the pressures that had started to put on conventional forms of generation had brought storage to the “forefront of recent discussions” on the future of energy markets.

The biggest factor standing in the way of the widespread adoption of storage technologies has so far been cost. But Citi said it foresaw a scenario in which storage follows the same path that some renewable energy types, particularly solar, had taken in recent years, in which falling costs lead to increased deployment, leading to further cost reductions.

Citi estimated that a reduction in storage costs to US$230/MWh – something it said was possible within 7-8 years – combined with solar generation would make self-consumption “financially attractive” in a number of developed countries.

A full version of this story, with further detail from the Citigroup report, is available at PV Tech Storage.