Photovoltaic (PV) Installations Little Marlow and Maidenhead
Deadline:15 Sept 2026, 11:00
Summary
Tender information
Harrow and Hillingdon
Barking & Dagenham and Havering
Hounslow and Richmond upon Thames
Redbridge and Waltham Forest
Camden and City of London
Enfield
Westminster
Southampton
Kensington & Chelsea and Hammersmith & Fulham
Portsmouth
Wandsworth
Isle of Wight
Milton Keynes
Berkshire
Central Hampshire
Oxfordshire
South Hampshire
Buckinghamshire CC
North Hampshire
Barnet
Type
Contract
Procedure
Not given
Ref. number
TC2444
Duration
29/04/2027 - 29/04/2042
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 15 September 2026, at 12:00 p.m.
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Lot nr.: 1
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
Duration contract start date : 29/04/2027 11:00:00 PM
Duration contract end date : 29/04/2042 11:59:59 PM
Criteria definitions: Price: 50 (Commercial)
Quality: 50 (Technical)
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Lot nr.: 2
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
Duration contract start date : 29/04/2027 11:00:00 PM
Duration contract end date : 29/04/2042 11:59:59 PM
Criteria definitions: Price: 50 (Commercial)
Quality: 50 (Technical)
Buyer
Thames Water Utilities Limited
Documents
Buyer
Thames Water Utilities Limited
Open for offers
25 days left
Important dates
18 Aug - Publication date
15 Sept - Deadline
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