Published date: 26 April 2021

Last edited date: 20 May 2021

Closed opportunity - This means that the contract is currently closed. The buying department may be considering suppliers that have already applied, or no suitable offers were made.

Closing: 26 May 2021, 4pm

Contract summary


  • High voltage installation work - 45315400

Location of contract

BH21 3BW

Value of contract


Procurement reference

Dorset Green H2 - HV Network Modifications

Published date

26 April 2021

Closing date

26 May 2021

Closing time


Contract start date

1 October 2021

Contract end date

1 April 2022

Contract type


Procedure type

Open procedure (above threshold)

Any interested supplier may submit a tender in response to an opportunity notice.

This procedure can be used for procurements above the relevant contract value threshold.

Contract is suitable for SMEs?


Contract is suitable for VCSEs?



This project comprises of the installation of an electrolyser with a compressor directly connected to a solar farm that has operational capacity of 5MW with supplemental energy either coming from locally installed gas engines or the grid.

The proposed 1 to 1.5 mega-Watt (MW) Proton Exchange Membrane (PEM) electrolyser will be installed on-site and used to produce green hydrogen, from a potable water feed and will be powered by the co-located solar farm - producing a carbon free fuel and energy storage opportunity that can be used to help decarbonise a number of downstream applications.

Within this project, the green hydrogen will be compressed and filled into hydrogen trailers.

This hydrogen is anticipated to be transported off-site for a variety of applications, however, neither of these distribution/use scenarios are included within this Tender.

The new installation will be connecting to an existing 11 kV Private Wire network that is currently supporting a 7MW Landfill Gas Generation facility. This connection is designed to support a 6.8MVA Export Capacity and a 375 kVA Import Capacity.

The Landfill Site, whilst equipped with 7MW of Landfill Gas Engines, only has only enough Landfill Gas to support the Generation of 1.8 MVA from the Landfill site.

The existing Landfill Site Electrical System will require significant modification to make it suitable for the connection of the proposed Solar Farm.

This tender is for the decommissioning of an existing substation, then the installation of 2 new substations with ancillary equipment and cabling to supply a new 5MW Solar POC and a 1.5MW Electrolyser POC.

Parties interested in supplying their services for this tender should refer to the attachments for all the necessary information relating to the application process and all equipment specifications.

More information


  • TR14.pdf
  • Bidding documents
  • TR14 pdf - Transformer Type TR14 Diagram


Additional text

For all information relating to the application procedure and specifications please refer to the attachments to this tender.

About the buyer

Contact name

Josh Williamson