Photovoltaic (PV) Installations Little Marlow and Maidenhead

What the buyer is asking for

IMPORTANT: Please read this section before deciding whether you wish to register for this event. This section provides you with information regarding the scope of this procurement and details some of the key requirements that a successful applicant MUST be able to deliver. The following conditions would be considered as some of key requirements for a supplier to meet to be considered for this opportunity: • Achilles Verification • Must have relevant experience to plan, manage and monitor the project • Must be able to comply with water industry standards, such as WIMES, where asset interaction is required The scope of work includes the finance, engineering, design, procurement, construction, testing and completion, and to operate and maintain two separate solar photovoltaic (PV) plants as summarised in the non-exhaustive list below: • Full design and engineering • Procurement • Installation • Commissioning • Distribution Network Operator (DNO) witnessing, testing and approval to satisfy the terms of the connection agreement or offer • Supporting OFGEM accreditation for REGOs • Operation and maintenance • Monthly and annual reporting • Training of emergency procedures • Training of essential operational activities • Documentation • Demarcation fencing and signage • Biodiversity net gain requirements and any visual impact requirements The PV installations are at two separate sites, both being ground mounted, with a maximum capacity of 1,000kWAC and 450kWAC. The Supplier shall design and optimise the size of the PV installation for behind-the-meter and achieve an attractive payback period and NPV. The scope will be awarded be via either an EPC or PPA (Power Purchase Agreement) model, with only one to be awarded. Thames Water reserves the right to refine the award criteria. Please note that that deadline for asking for access to the PSQ & submitting of the PSQ is 22 September 2026, at 12:00 p.m.

How this is scored

Published by the buyer. A winning response is written to these weightings, not to the question.

• 50%priceCommercial
• 50%qualityTechnical

2 lots

You can usually bid for one lot without bidding for all of them.

• Supply and Installation (EPC)

  The scope of work includes the engineering, design, procurement, construction, testing and completion, and to operate and maintain the solar photovoltaic (PV) plant as summarised in the non-exhaustive list below: [MD2.1] • Full design and engineering • Procurement • Installation • Commissioning • Distribution Network Operator (DNO) witnessing, testing and approval to satisfy the terms of the connection agreement or offer • Supporting OFGEM accreditation for REGOs • Operation and maintenance • Monthly and annual reporting • Training of emergency procedures • Training of essential operational activities • Documentation • Demarcation fencing and signage

• Fund, Design, Build, Ownership, Operation & Maintenance (PPA)

  The scope of work includes the funding, engineering, design, procurement, construction, testing and completion, and to operate and maintain the solar photovoltaic (PV) plant as summarised in the non-exhaustive list below[MD2.1]: • Full design and engineering • Procurement • Installation • Commissioning • Distribution Network Operator (DNO) witnessing, testing and approval to satisfy the terms of the connection agreement or offer • Supporting OFGEM accreditation for REGOs • Operation and maintenance • Monthly and annual reporting • Training of emergency procedures • Training of essential operational activities • Documentation • Demarcation fencing and signage

How contested is this?

Buyers publish how many bids they received. Across 77 comparable procurements we can tell you the typical field size, how often one of these goes uncontested, and whether the buyer awards on price or on quality.

Timeline

4 published dates · Europe/London

1. Clarification questions by13 days ago

   8 Sept 2026, 17:00 BST
2. Tender notice published12 days ago

   10 Sept 2026, 10:26 BST
3. Submission deadlinetoday

   22 Sept 2026, 12:00 BST
4. Award decision expected byin 221 days

   30 Apr 2027, 23:59 BST

Commercial outcome and contract awards

Nothing awarded yet

Notice history

2 events · 2 releases on Find a Tender

1. Tender notice18 Aug 2026, 13:19 BST078540-2026
2. Tender updated10 Sept 2026, 10:26 BST085705-2026

Documents

• Tender notice on Find a Tender