US-based energy storage project developer and software company Demand Energy has been acquired by Italian utility company Enel.

The latest step in Hawaii’s clean energy evolution will be the deployment of a 20MW, five-hour duration battery energy storage system paired with 28MW of solar in Kaua’i, to match peak demand with generation.

Lithium mining and extraction companies have made several recent high profile moves to increase their production of the metal, which is used to make the batteries in many stationary energy storage systems and EVs.

Energy storage should be properly valued and supported at federal level in the United States, according to a government document analysing and evaluating energy policy released by officials of the outgoing Obama administration.

Tesla and Panasonic’s Gigafactory in the Nevada desert has now started making high performance cylindrical battery cells of the type used in its stationary storage and forthcoming Model 3.

Canada-headquartered lithium-ion battery manufacturer Electrovaya increased its revenues year-on-year in the financial year which finished at the end of September, but the company also reported increased losses.

Oregon has become the latest US state to lay out its foundations for electricity companies to procure and deploy energy storage systems, with the state Public Utility Commission (PUC) providing guidelines and timelines.

Geothermal power and renewable energy developer Ormat Technologies has signalled its intent to join demand response and energy storage markets with the purchase of Viridity Energy.

The north-eastern US state of Massachusetts will introduce a procurement target for energy storage resources, with the state’s department of energy resources (DOER) collecting views from stakeholders.

Every year sees energy storage build on the success of the preceding one, it seems, and this year we were able to carry insights and opinions from some of the best placed participants and observers. Here’s our picks for the content most representative of the year it’s been, as well as the 10 most read news stories on the site.