Sector · GCC-S01
Grid connection consultants for data centres
Data centres are large, continuous electricity demand connections. Capacity is the deciding factor in where they can be built, and in several parts of the UK, notably west London, available demand capacity has become the main constraint on new sites.
- Typical size
- 5 MW (edge) to 300 MW+ (hyperscale campus)
- Typical voltage
- 33 kV to 132 kV; transmission (275–400 kV) for the largest campuses
- Route
- DNO demand connection, or directly connected demand via NESO
- Timeline
- Highly location-dependent; constrained areas have seen dates quoted many years out
Connecting data centres in the UK
Consultancies in this category help with site screening against network capacity, demand applications to the DNO or NESO, offer review, and options such as phased capacity, on-site generation or flexible connections.
Current regulatory issues
- Directly connected demand falls within the scope of GB connections reform and Gate 2 readiness requirements.
- Ofgem has consulted on a commitment fee for large demand projects, including data centres, intended to discourage speculative applications.
- Government AI Growth Zones may change how capacity is prioritised in designated areas.
Track record counts only projects in this sector.
Best grid connection consultants for data centres
Ranked by a published formulaMethodology
| Rank | Consultancy | Services | DNO coverage | Typical size | Score |
|---|---|---|---|---|---|
| 01 | Power On Connections Coventry · est. 2003 · 200+ staff Unverified Data centre · Industrial · Housing · BESS · Solar · Wind | Services | DNO areas14/15 | Size500 kW – 100 MW | Score35.9 |
| 02 | Power and Grid Engineering Stoke-on-Trent · est. 2022 · 1-5 staff Unverified Solar · Wind · BESS · Data centre · Industrial | Services | DNO areas14/15 | Size1–100 MW | Score31.6 |
| 03 | UCML Wrexham · est. 2004 · 16-50 staff Unverified Housing · Industrial · Data centre · Solar | Services | DNO areas04/15 | Size350 kW – 3 MW | Score27.6 |
| 04 | SLR Consulting London · est. 1994 · 200+ staff Unverified Wind · Solar · BESS · Data centre · Industrial · EV hubs | Services | DNO areas01/15 | Size1–100 MW | Score25.9 |
| 05 | TNEI Manchester · est. 1999 · 51-200 staff Unverified Wind · Solar · BESS · Data centre · Industrial | Services | DNO areas00/15 | Size1–200 MW | Score24.5 |
| 06 | Aurora Power Consulting Bristol · est. 2007 · 6-15 staff Unverified BESS · Solar · Wind · Data centre · Industrial | Services | DNO areas00/15 | Size10–250 MW | Score20.4 |
| 07 | Fulcrum Sheffield · est. 2005 · 200+ staff Unverified Data centre · Housing · EV hubs · Industrial · Solar | Services | DNO areas02/15 | Size100 kW – 49.9 MW | Score19.9 |
| 08 | Engineering Power Solutions Stockton-on-Tees · est. 2012 · 6-15 staff Unverified BESS · Wind · Solar · Data centre · Industrial | Services | DNO areas01/15 | Size2–200 MW | Score19.2 |
| 09 | Blake Clough Consulting Slaithwaite · est. 2021 · 51-200 staff Unverified Wind · Solar · BESS · Data centre | Services | DNO areas00/15 | Size50–110 MW | Score18.9 |
| 10 | RSK Utility Consulting Ipswich · est. 2018 · 6-15 staff Unverified Wind · BESS · Solar · EV hubs · Housing · Industrial · Data centre | Services | DNO areas02/15 | Size50 kW – 100 MW | Score17.6 |
| 11 | Roadnight Taylor Burford · est. 2013 · 16-50 staff Unverified Data centre · BESS · Solar · Wind · Industrial · Housing | Services | DNO areas00/15 | Size1–100 MW | Score15.6 |
| 12 | Connectus Utilities Leicester · est. 2023 · 6-15 staff Unverified Housing · Industrial · Data centre | Services | DNO areas02/15 | Size50 kW – 2 MW | Score15.1 |
| 13 | HZ Power London · est. 2021 · 1-5 staff Unverified Solar · BESS · Data centre | Services | DNO areas00/15 | Size94 kW – 960 MW | Score13.4 |
| 14 | Utility Connections Warrington · est. 2019 · 16-50 staff Unverified Data centre · Industrial · Solar · BESS | Services | DNO areas00/15 | Size100 kW – 20 MW | Score12.6 |
See the full UK rankingGet matched with consultants for data centres
Data centres: common questions
Q01How much grid capacity does a data centre need?
It depends on IT load and cooling. Edge facilities may need a few megawatts, while hyperscale campuses commonly plan for hundreds of megawatts delivered in phases. A consultant can help size an initial and ultimate capacity request so you do not over- or under-apply.
Q02Should a data centre connect to the DNO or to the transmission network?
Smaller sites usually connect to the distribution network at 33 kV or 132 kV. Very large campuses may need a direct transmission connection, which is applied for through NESO. The right route depends on capacity, location and the nearest point of connection with headroom.
Q03Can a data centre get an earlier connection date?
Sometimes. Options include phased capacity, accepting a flexible or interruptible connection, on-site generation or storage, or choosing a site near spare capacity. A connection offer review will show which of these are realistic for a given site.