News in brief: Younicos partnership on Bavaria’s renewables integrating flow battery, Greensmith raises US$12.3 million including investment from utility AEP, UK virtual power plant triallist Moixa extends crowdfunding period.

While a project to run a Spanish island off renewable energy which gathered media attention this week might only have successfully met the region’s energy demand continuously for four hours, the project is nonetheless “very significant”, an expert with the International Renewable Energy Agency (IRENA) has said.

Through a brief history of batteries and some findings from his own team’s work, Volker Wachenfeld of SMA Solar Technology answers a frequently asked question in energy storage; how can compatibility with the existing variety of batteries in the market be put into practice?

PV Tech Storage’s publisher, Solar Media, recently conducted a round table discussion event, bringing together a range of industry figures from analysts to manufacturers, to discuss the future of the UK residential energy storage industry. While there is more in depth coverage of event to come on PV Tech Storage and through Solar Media’s various other channels, here are two short videos summing up some of the thoughts of attendees on key topics.

Enphase CEO Paul Nahi has said that the “unique” modularity of the company’s battery solution could be “incredibly valuable” to help it to meet the needs of customers in regions including Australia, where there is a “real economic case” for energy storage.

A push by US leasing giant SolarCity to serve small and medium enterprises (SMEs) with its commercial solar offering will be bolstered by a tie-in with the company’s energy storage solutions, a spokesman has confirmed.

Battery manufacturer BYD’s deal to supply up to five electric double-decker buses for London is a “big win” for the company but not enough for them to start discussions on a European base, according to Lux Research’s Lilia Xie.

Energy storage technology is now used in 44% of US microgrids with 92% of that storage commissioned since 2012, according to GTM Research’s latest report.

Some news in brief from around the world of energy storage this week: UK residential storage company chases scale with crowdfunder, Younicos could hire 150 more employees by 2017, and Southern California Edison is set to flick the switch on a grid-stabilising storage system from NEC ES.

Lilia Xie of Lux Research spoke with the founders of 24M, which claims to have reduced lithium cell costs by 50% over existing technologies and is targeting US$100 per kWh by 2020.