Battery storage technology costs will have to fall by a further 30% before projects in the UK are feasible without lucrative frequency response revenues, a leading investor has said.

Northern Powergrid, one of the six distribution network operators (DNOs) responsible for delivering power across regions of the UK, is to plough £1.9 million (US$2.53 million) into the creation of a smart energy grid across its network, allowing its eight million customers to trade power and services using their home solar, battery systems and electric vehicles (EVs).

UK renewables and battery developer Anesco has warned that the looming de-rating of battery storage in the Capacity Market risks scaring investors away from the technology.

US Energy Secretary Rick Perry has applauded the coming together of National Grid and his Department of Energy’s Pacific Northwest National Laboratory, to jointly research areas including grid-scale storage and grid modernisation.

The UK government’s Department of Business, Energy and Industrial Strategy (BEIS) has refused to provide any clarity over when a decision on the potential de-rating of energy storage assets within the capacity market (CM) will be made despite a senior policy advisor stating the judgement is “imminent”.

A planned energy storage system backed with a diesel generator could remove the need to build an expensive undersea cable to serve the island of Nantucket, off the coast of Massachusetts in the US.

A representative of National Grid, the UK’s transmission system operator (TSO), has said that energy storage will be “integral” to the network’s flexibility strategy – while urging developers not to rely solely on early frequency regulation contracts.

The UK’s large-scale battery storage installations have reached 100MW of capacity, made up of around 50 individual sites larger than 250kW. Lauren Cook of Solar Media’s Market Research team discusses how this point has been arrived at and what we might expect to see coming next.

No one moment took energy storage into the mainstream of the UK power system more than the outcome of National Grid’s August 2016 tender for Enhanced Frequency Response (EFR). Reporter David Pratt examines the business case behind Vattenfall’s first EFR project and asks what grid operators and regulators’ next moves are likely to be.

Energy storage investors in Britain will need to have their projects in the ground by June next year at the latest if they are to take advantage of the lucrative new ancillary services market set to be implemented by National Grid, according to Sungrow’s European managing director.