Lithium-ion (Li-ion) batteries accounted for 90% of all proposed grid storage projects in 2014, according to a new study by Lux Research.

SunEdison has made a significant first step into the grid-scale energy storage market, with the acquisition of US startup Solar Grid Storage.

The International Renewable Energy Agency (IRENA) is to run a workshop in Germany next month to canvas final opinion ahead of publishing its first roadmap for electricity storage technologies.

EOS Energy Storage has placed an order totalling more than 1MW from NASDAQ-listed power converter specialist Ideal Power, while both companies have launched new products since the start of the year.

Another large-scale project to test the grid-stabilising capabilities of battery-based energy storage systems will be launched at a solar farm in England, led by the National Grid, which is responsible for the UK’s electrical transmission network infrastructure.

Two providers of large-scale battery systems for energy storage have announced expansion plans this month, with Vizn Energy opening new headquarters in Texas, and Younicos forming three separate new business units to address “rapid growth” in the market.

The UK’s minister for energy has said that her government is not planning any framework of incentives for energy storage, but said nonetheless that public funds can help “bridge the gap” between ideas and commercialisation.

E.ON, the German utility giant with 61GW of generation assets, has announced plans to split its business in two. The company will stake its future on renewables in a major restructuring, spinning off its conventional power generation business, in part as a response to the growth in distributed generation. Cosmin Laslau of Lux Research digs deeper.

This year will be the one when “PV energy storage systems (PVESS) make an enormous leap toward wide-scale adoption”, according to research firm IHS.

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.