Arrowsmith Hydrogen Project – HP1

December 19th, 2022

Arrowsmith Hydrogen Project – HP1

A renewable hydrogen production facility is planned to be built in stages near Dongara in Western Australia with a focus on supplying hydrogen for mobility purposes, with power use options also under examination.

Main proponents:

Infinite Green Energy Ltd

Main end-use classification:

Hydrogen mobility, power use


Under development – HP1 is focussed on domestic Australia markets with production anticipated to commence in late 2025

Estimated cost:


Other involvement:


Production details:

23 tonnes per day hydrogen production capacity – Stage I, with expansion up to 42 tonnes per day capacity in its current design – Stage II


Western Australia, Australia

Announced funding:


Project description

The Arrowsmith Hydrogen Project – HP1, being developed by Infinite Green Energy, in its current design would have capacity to produce up to 42 tonnes (42,000 kilograms) per day of renewables-based hydrogen to supply domestic Australian markets. The plant would be located in Arrowsmith, approximately 30 kilometres south of Dongara in Western Australia (or approximately 300 kilometres north of Perth).

The project proponent submitted its environmental impact assessment to the Western Australia Environmental Protection Authority (EPA) for the HP1 project in mid-2022. Key features of the Referral include:

  • solar farm (minimum 65 MW to maximum 85 MW generation capacity)
  • wind turbines (22 minimum to 25 maximum x 6 MW generation capacity)
  • water supply (groundwater)
  • processing plant output (maximum production extent 23 tonnes per day to 42 tonnes per day)
  • storage and offloading (20 MW battery storage)

Once commissioned, the plant would produce liquified compressed hydrogen utilising site ground water with final product transported via hydrogen fuelled road tankers to end users.

The project proponent is updating site layout, including repositioning of some wind turbines, and is also updating the Heritage report.

At a hydrogen production of around 23 tonnes per day, the project would displace approximately 116,00 tonnes of CO2 annually; at a production level of around 42 tonnes per day of hydrogen, the project would displace approximately 200,0000 tonnes of CO2 emissions annually.

The project is expected to come online in late 2025 and would serve the domestic Western Australian energy and transport markets.

The Front End Engineering and Design (FEED) study was undertaken by Petrofac and completed in mid-2021. The Arrowsmith facility includes a 100MW alkaline electrolyser facility and options for a 50 tonne per day liquefaction system.

The proponent has executed a 20-year offtake agreement with 2 x 5-year extensions for 100% of the project’s hydrogen production. The hydrogen will be delivered in liquid form to existing roadhouse infrastructure (which supports vehicles travelling from Perth to regional Western Australia, including the Pilbara area) and new locations being developed. The off-take quantity would ramp up to full (Stage I) production over an anticipated 12-month period.

The project proponent is in the final stages of discussions to secure a strategic partner for the Arrowsmith development: final Term Sheets are out, and the project proponent is looking to announce strategic partners for Arrowsmith development, including its expansion to 2.5 GW of renewable energy.

The project proponent has advised that the project has obtained Lead Agency status from the Department of Jobs, Tourism, Science and Innovation.


Reviewed: May 2023