UK solar firm Hive partners CellCube, Immersa for flow battery development

By Liam Stoker
LinkedIn
Twitter
Reddit
Facebook
Email

Hive Energy, a UK-based utility-scale solar developer, has entered into a consortium with vanadium redox flow battery manufacturer CellCube and Immersa to jointly build solar-plus-storage projects in the UK.

And the trio already has its first project in the works, expected to complete later this year.

HICC Energy, as the consortium has been billed, was founded last week and will look to bring a portfolio of projects to market utilising third-party project financing.

The trio cited new opportunities for long duration batteries created by the derating methodologies adopted by grid operators in the UK when factoring their capabilities in markets like the country’s Capacity Market.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

Those derating factors have been designed to reflect any given project’s capability to respond to energy system stress events over the course of four hours, meaning that projects with longer durations than more prevalent lithium-ion technologies are better reward.

Hive, Immersa and CellCube said those market developments meant that combining solar with long duration storage technologies to be the “most competitive and commercially attractive solution” under current UK regulations.

While Hive will be responsible for the development of grid-connected solar farms under the partnership, Immersa will work on the deployment of CellCube’s vanadium redox flow technology.

Hugh Brennan, managing director at Hive Energy, said the advent of long duration storage becoming available at cost-competitive prices allowed it to offer a “reliable renewable energy supply to the market”.

“Predictable power generation not only offer services at an attractive price to the balancing market but can also enter the short term operating reserve or STOR market which allows access to sources of extra power,” Robert Miles, chief executive at Immersa, added.

13 October 2026
London, UK
Now in its second edition, the Summit provides a dedicated platform for UK & Ireland’s BESS community to share practical insights on performance, degradation, safety, market design and optimisation strategies. As storage deployment accelerates towards 2030 targets, attendees gain the tools needed to enhance returns and operate resilient, efficient assets.

Read Next

August 28, 2026
A roundup of some of the best user-posted views, analysis and reveals from across the energy storage community in the past week.
August 25, 2026
The UK government has launched a new grant funding programme for energy storage technologies that can provide inter-day and seasonal energy shifting applications.
August 20, 2026
In this US news roundup, BESS projects in California, Arizona, and Nevada advance from EDP Renewables, Tucson Electric Power, and EDF Power Solutions North America.
August 17, 2026
A new report from climate consultancy Ember highlights the important relationship between energy storage and solar, unlocking the “era of anytime solar.”
August 17, 2026
Independent power producer (IPP) Econergy has signed financing agreements for its Părău 2 solar and energy storage project in Brașov County, Romania.