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PROCUREMENT OPPORTUNITY

Photovoltaic (PV) Installations Little Marlow and Maidenhead

THAMES WATER UTILITIES LIMITED · Tender notice on Find a Tender

Tender information last checkedLast checked 23 Sept 2026, 21:21.

Opportunity overview

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.

Classification

  • CPV09330000 — Solar energy

Lots

  • Supply and Installation (EPC)Value not stated · Including VAT
  • Fund, Design, Build, Ownership, Operation & Maintenance (PPA)Value not stated · Including VAT

Documents and notices

Published notice details

Additional information from the published procurement release. Fields appear only when supplied by the source; check the original notice and tender documents before acting.

Scope, procedure and submissions

Id
TC2444
Status
active
Procurement Method
open
Procurement Method Details
Competitive flexible procedure
Main Procurement Category
goods
Above Threshold
Yes
How to submit
If you are interested in participating, please complete this form: https://forms.cloud.microsoft/e/1BQb6xH72W

Legal basis

Id
2023/54
Scheme
UKPGA

Procedure

Features
The PSQ is will have one 'General PSQ' questionnaire which all bidders are required to complete regardless of the lots applied for. Each bidder is to then separately complete each 'Lot Specific' questionnaire relevant to the lots they wish to apply for. Each Lot will be evaluated individually with each Lot survey totalling 100%. Pass/Fail answers from the General PSQ will be combined with the scores from each Lot Specific survey completed to give an overall score out of 100% for each lot applied for. Bidders may bid for one or multiple lots. Responses to this PSQ will be evaluated against selection criteria, to select bidders to proceed to the next stage of this procurement process. 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 4-8 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 2 bidders from ITN Stage 2 will move through to ITN Stage 3, to negotiate the final agreement. This description applies to all Lots applied for.

Special regime

utilities

Submission terms

Electronic Submission Policy
allowed

Languages

en

Tender Period

Ends
22 Sept 2026, 12:00

Enquiry period

Ends
8 Sept 2026, 17:00

Expected award period

Ends
30 Apr 2027, 23:59

Amendments

Entry 1
Description
The PSQ submission deadline changed to 22 September 2026 at 12:00pm.
Id
085705-2026

Lots and requirements

Entry 1
Id
1
Title
Supply and Installation (EPC)
Description
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
Status
active
Has Renewal
Yes

Value

Including VAT
0
Currency
GBP

Award criteria

Criteria

Criterion 1
Type
price
Name
Commercial

Numbers

Entry 1
Number
50
Weight
percentageExact
Criterion 2
Type
quality
Name
Technical

Numbers

Entry 1
Number
50
Weight
percentageExact

Suitability

Sme
Yes
Vcse
Yes

Contract period

Starts
30 Apr 2027, 00:00
Ends
30 Apr 2042, 00:59
Max Extent Date
30 Apr 2052, 00:59

Renewal

Description
Lot 1: Thames Water envisages that the contract will be awarded for an initial term of 5 years, with no extension options. Lot 2: 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.
Entry 2
Id
2
Title
Fund, Design, Build, Ownership, Operation & Maintenance (PPA)
Description
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
Status
active
Has Renewal
Yes

Value

Including VAT
0
Currency
GBP

Award criteria

Criteria

Criterion 1
Type
price
Name
Commercial

Numbers

Entry 1
Number
50
Weight
percentageExact
Criterion 2
Type
quality
Name
Technical

Numbers

Entry 1
Number
50
Weight
percentageExact

Suitability

Sme
Yes
Vcse
Yes

Contract period

Starts
30 Apr 2027, 00:00
Ends
30 Apr 2042, 00:59
Max Extent Date
30 Apr 2052, 00:59

Renewal

Description
Lot 1: Thames Water envisages that the contract will be awarded for an initial term of 5 years, with no extension options. Lot 2: 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.

Items and delivery

Item 1
Id
1
Related Lot
1

Additional Classifications

Entry 1
Scheme
CPV
Id
09330000
Description
Solar energy

Delivery locations

Entry 1
Region
UKI
Country
GB
Country Name
United Kingdom
Entry 2
Region
UKJ
Country
GB
Country Name
United Kingdom
Item 2
Id
2
Related Lot
2

Additional Classifications

Entry 1
Scheme
CPV
Id
09330000
Description
Solar energy

Delivery locations

Entry 1
Region
UKI
Country
GB
Country Name
United Kingdom
Entry 2
Region
UKJ
Country
GB
Country Name
United Kingdom

Published documents

Entry 1
Id
conflictOfInterest
Document Type
conflictOfInterest
Description
Not published
Entry 2
Id
085705-2026
Document Type
tenderNotice
Notice Type
UK4
Description
Tender notice on Find a Tender
Published
10 Sept 2026, 10:26
Format
text/html

Buyer, suppliers and contacts

Organisation 1
Name
THAMES WATER UTILITIES LIMITED
Id
GB-COH-02366661

Identifier

Scheme
GB-COH
Id
02366661

Additional Identifiers

Entry 1
Scheme
GB-PPON
Id
PNQQ-4647-DTCV

Address

Street Address
Clearwater Court
Locality
Reading
Postal Code
RG1 8DB
Country
GB
Country Name
United Kingdom
Region
UKJ11

Contact

Roles

buyer

Details

Classifications

Entry 1
Scheme
UK_CA_TYPE
Id
privateUtility
Description
Private utility

Recorded locations

  • Buyer location · Reading · UKJ11 · RG1 8DB · United Kingdom
  • Delivery location · UKI · United Kingdom
  • Delivery location · UKJ · United Kingdom

Notice and amendment history

2 published notice versions reviewed by ProcuraAxis.

2 VERSIONS
  1. 078540-2026Tender notice on Find a Tender ·
  2. 085705-2026Tender notice on Find a Tender ·