Cardiff South and Penarth
Cardiff South and Penarth has 25 MW of clean power (all solar) approved and still not built: enough to supply a year's electricity to 9,000 homes. Britain's grid bottlenecks still add to bills here: about £92 a year per household, £3.9m across the constituency's 42,951 homes. A 50 MW battery was refused planning here in 2025; while discharging it could have supplied about 175,000 homes.
Ranks 183 of 650 for clean power approved and not built.
What is stuck, and why
| Project and developer | Tech | Size | Why it is stuck |
|---|---|---|---|
| Rover Way, Splott - Energy Park & Data CentreLatos Cardiff Limited | Battery | 1,000 MW | Approved a year ago — nothing has happened sinceWho can move it: the developer and the network company · planning ref 24/00624/FUL |
| Sully Moors Road - Battery Energy Storage FacilityCentrica Plc Head Office | Battery | 50 MW | Approved less than a year ago — nothing has happened sinceWho can move it: the developer and the network company · planning ref 2025/00807/FUL |
| Pen Y Maes, Ashby Road - Battery Energy StorageRoot Power South Limited | Battery | 50 MW | Refused by Vale of Glamorgan Council in 2025Who can move it: Vale of Glamorgan Council · planning ref 2024/00999/FUL |
| Brynwell FarmBrynwell Farm Solar Limited | Solar | 21 MW7,600 homes | Approved 4 years ago — nothing has happened sinceWho can move it: the developer and the network company · planning ref DNS/3261558 |
Plus 1 smaller projects — see the full seat page.
Compared with its neighbours
| Constituency | Approved, not built | Running | Paid to switch off |
|---|---|---|---|
| Cardiff South and Penarth | 25 MW | 12 MW | not visible |
| Vale of Glamorgan | 123 MW | 74 MW | not visible |
| Cardiff East | 0.4 MW | 13 MW | not visible |
| Cardiff West | 0 MW | 0 MW | not visible |
| Cardiff North | 0.7 MW | 0 MW | not visible |
Vale of Glamorgan next door has 123 MW waiting, more than Cardiff South and Penarth's 25 MW.
The rest of the briefing
- Every approval each project still needs, and which of them the public can see
- What building them would mean here — community payments, business rates and construction work
- Drafted parliamentary questions and letters, filled in with this seat's figures
- 3 story angles for local reporting
- A two-page PDF, and a newsroom edition with the references and who to call
Everything above needs no account, and neither does the full seat page, the method or this constituency's raw data. The account covers the packaged briefing and its PDF, and nothing else.