‘UK’s first’ grid-scale battery storage system comes online in Oxford

Image: Pivot Power/Greenhouse PR 

The battery was ordered in early 2020 and forms part of Oxford’s Energy Superhub project, first announced by the Government in 2019 as part of a string of new smart energy systems demonstrator projects. It is connected to National Grid’s high-voltage transmission system at its substation, providing the flexibility services so often said to be a key part of the transition to more renewable electricity generation and distribution.

An 8km private wire network has been installed with the battery. This will share the connection to the transmission system with public and commercial electric vehicle (EV) charging hubs across the Oxford city-region. The first location to benefit will be the Redbridge Park & Ride, which will feature 38 ultra-rapid chargers once it opens later this year.

While the 50MW lithium-ion battery is now activated, the Superhub is not yet classed as completely online. A vanadium redox flow battery, from Invinity Energy Systems, will come online later this year. This kind of battery has been touted as having a longer lifespan than lithium-ion models and is regarded as easier to scale, but the technology is not as mature, especially at grid scale.

Pivot Power is leading the Superhub project, in partnership with battery operation and management services providers Habitat Energy, technology supplier Wärtsilä Energy, Oxford University, Oxford City Council, Kensa Consulting and Invinity Energy Systems.

Pivot Power’s chief executive Matt Allen said the connection of the battery to the transmission network is a “key milestone” for the project.

“We are planning up to 40 similar sites throughout the country, totalling up to 2GW of battery storage – forming a key pillar of EDF’s plan to develop an additional 10GW of battery storage globally by 2035,” Allen said.

Battery funding

In related news, battery storage array owner and operator Zenobe has secured funding from Santander to help deliver a 100MW/107MWh battery project in Capenhurst, near Chester.

The project is expected to be the largest of its kind in Europe once it is completed next year. However, it bears a high price tag. Aside from the funding from Santander, Zenobe has already raised £150m through Infracapital.

The battery will be used by National Grid to help manage the increased volatility in the frequency and voltage of the network in the Mersey area. Zenobe claims it will be capable of supplying enough electricity to meet the needs of more than 100,000 homes for an hour at peak demand. It will also be used to provide flexibility services.

According to RenewableUK’s latest Energy Storage Project Intelligence research, published in February, the UK has more than 16GW of battery storage capacity planned across more than 700 projects. 

The Department for Business, Energy and Industrial Strategy (BEIS) moved last summer to ease planning restrictions for utility-scale batteries, permitting cells over 50MW in England and arrays over 350MW in Wales.

Sarah George

Comments (2)

  1. Richard Phillips says:

    50 MW is only half the story; the other half is the MW.hour value.
    Zenobe has done the job properly, quoting both MW and the MWh values
    Probably just me being fussy!!
    Richard Phillips

  2. Lawrence Rose says:

    Don’t apologise for being fussy.

    The devil is very much in the detail in relation to large scale batteries.

    Does it do 50MW for 1 hour (i.e. capacity 50MWh), 50MW for 50 hours (i.e. capacity 2500 MWh), 1MW for 50 hours (again, 50MWh), or what?

    Consider what the physical scale of such batteries will be to deal with the intermittency of wind power, and the vast amounts of lithium need to make those batteries.

    To get a realistic idea of how much storage capacity GB will actually need, take a look at https://our-energy-future.com/News_Articles/News-2021-06-15-01 .

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