About

Vision

The Gigastack Phase 2 public report was completed and published in November 2021, a key milestone for the project, highlighting the progress made to date. Since 2019, the consortium has taken feasibility stage concepts through Front End Engineering Design for a 100MW electrolyser system which will use renewable power from Hornsea Two – the world’s largest offshore windfarm – to provide renewable hydrogen to the Phillips 66 Humber Refinery to replace hydrocarbon-based fuels within industrial-scale fired heaters.

The consortium has matured the production facility’s technical concept and begun testing the next-generation electrolyser technology at ITM Power’s Sheffield site. As a result, the consortium has defined and described the pathway to a final investment decision and commercial operation of a 100MW scale electrolyser system powered by offshore wind in 2025. This will meet approximately 40% of the UK Government’s target of contracted electrolytic capacity by end of 2023 and act as a critical stepping-stone for the 5 GW 2030 target.

Once built, Gigastack will support the decarbonisation of the Humber region, the UK’s largest industrial cluster, and support the UK’s offshore wind and electrolyser supply chain competitiveness. Gigastack will also lay the groundwork for future expansion in the Humber region and will catalyse the renewable hydrogen sector by providing a blueprint for scalable electrolyser technology in the UK.

The project has already helped create more than 100 jobs at ITM Power’s Gigafactory and the initial 100MW is projected to create an additional 180 jobs, whilst an expansion to 1GW by 2030 could contribute up to £2.5bn Gross Value Added and 1,700 created and safeguarded jobs in Immingham’s local economy.

100 MW FEED Study

ITM Power’s new 5MW stack will enable the deployment of Gigawatt-scale systems

<£400 /kW

Installation costs will be reduced to a fraction of today’s costs

1 GW/yr

ITM Power’s Giga-factory will meet the future demand for large-scale electrolysis

1.4 GW Wind Farm

Gigastack will explore a direct electrical connection to the Hornsea substation

UP to 30% of Existing Refinery Demand

The 100MW electrolyser will supply up to 30% of the refinery’s existing hydrogen demand and potentially cover new demand linked to expansion opportunities


See more