Scope
Reference
TC2252
Description
Project to include funding, design, build, ownership, operation and maintenance for the Farmoor Floating Solar PV (FPV) Project for up to 4MW, with a standard Power Purchase Agreement (PPA) in place (£ per kWh), with commitment from TWUL to take all energy generated from the installation. The total value of this project will be determined by the PPA price as per the agreed bid sheet, over the term of the agreement.
The scope of work is summarised in the non-exhaustive list below: full design and engineering, procurement, full MEICA installation, commissioning (including commissioning activities at point of connection), 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 installation will be floating with a maximum capacity of 4MW. The Supplier shall design and optimise the size of the PV plant for behind-the-meter use and achieve an attractive payback period and NPV. The PV plant shall require inhibiting when the board is being fed from the generator or in an island situation.
The PV plant shall utilise the most efficient and appropriate components to ensure an efficient and low-maintenance system.
The scope will be awarded via PPA model, with a subsequent Lease Agreement, with only one supplier to be awarded.
Total value (estimated)
- £0 including VAT
Above the relevant threshold
Contract dates (estimated)
- 24 April 2026 to 23 April 2041
- Possible extension to 23 April 2051
- 25 years
Description of possible extension:
Thames Water envisages that the contract will be awarded for an initial term of 15 years with options to extend by 5 year or longer, up to a maximum overall term of 25 years.
Main procurement category
Goods
CPV classifications
- 09330000 - Solar energy
Contract locations
- UKJ1 - Berkshire, Buckinghamshire and Oxfordshire
Submission
Submission type
Tenders
Tender submission deadline
21 October 2025, 10:00am
Submission address and any special instructions
You can request access of participation here:
Tenders may be submitted electronically
Yes
Languages that may be used for submission
English
Award decision date (estimated)
24 April 2026
Award criteria
| Name | Type | Weighting |
|---|---|---|
| Technical | Quality | 50% |
| Commercial | Price | 50% |
Other information
Conflicts assessment prepared/revised
Yes
Procedure
Procedure type
Competitive flexible procedure
Special regime
Utilities
Competitive flexible procedure description
The PSQ will have one 'General & technical PSQ' questionnaire which all bidders are required to complete. Responses to this PSQ will be evaluated against selection criteria, to select bidders to proceed to the next stage of this procurement process. We will short list the top scoring 8-10 bidders who will progress to the ITN stage.
The selection criteria will be a combination of financial and non-financial factors and will include:
a) Legal and financial capacity to perform the contract;
b) Technical ability to perform the contract
There are three types of questions:
1. Pass/Fail Questions
Pass/Fail questions are stated as such in the Questions. Failure to meet our requirements in these questions may result in elimination of the Bidder
2. Weighted Questions
The scores given for weighted questions are used to calculate the final score.
3. For information only
Some questions are for information only; these will not be scored
We are evaluating your submission through the following evaluation methods and high-level criteria:
1. Organization Questions including financial and economic standing, Forms of Security, Health and Safety etc.
2. Technical Questions including Experience, Capability, O&M Experience, Environment, Workforce and Subcontractors, Innovation and Quality Assurance
We will score the PSQ submissions and shortlist the bidders who pass the selection criteria required to progress to the next stage. We will shortlist the top scoring 8-10 bidders, with the top scores, who will progress to the ITN stage.
We will evaluate your response in the ITN through the following criteria:
1. MAT
We will evaluate your response in accordance with Most Advantageous Tender (MAT) award criteria. Both technical and commercial responses will be scored in detail and weighted to give an overall score.
2. Pass/Fail Questions
Pass/Fail questions are stated as such in the Questions. Failure to meet our requirements in these questions may result in elimination of the Bidder
3. Weighted Questions
The scores given for weighted questions are used to calculate the final score.
4. For information only
Some questions are for information only; these will not be scored
We are evaluating your submission through the following evaluation methods:
1. Technical (50% weighting)
2. Commercial (50% weighting)
This is a 3 Stage ITN Process, where we reserve the right to shortlist 3-5 bidders through to ITN Stage 2, with their Stage 1 scores being carried over, and their technical score being reapportioned. The highest scoring bidder ITN stage 2 will move through to ITN stage 3, to negotiate the final agreement,
Contracting authority
THAMES WATER UTILITIES LIMITED
- Companies House: 02366661
- Public Procurement Organisation Number: PNQQ-4647-DTCV
Clearwater Court
Reading
RG1 8DB
United Kingdom
Region: UKJ11 - Berkshire
Organisation type: Private utility