No.343 of 650 · approved, not built MP: Satvir Kaur (Labour) England

Southampton Test

Southampton Test has 1.9 MW of clean power (all solar) approved and still not built: enough to supply a year's electricity to 700 homes. Britain's grid bottlenecks still add to bills here: about £92 a year per household, £4.2m across the constituency's 45,586 homes.

Not visible
here

No big wind farm on the national grid is mapped to this constituency, so no switch-off payments show here in national data. Smaller wind farms on the local grid can still be paid to switch off — invisibly. The £ figure for this seat is a floor, not a zero.

how we worked this out

1.9 MW

of clean power — all solar — approved and still not built, enough to supply a year's electricity to 700 homes. Approved at least two years ago; waiting on the grid, not on planning.

6 projects · planning database (REPD), July 2026 · how we worked this out

£4.2m

is what the grid gap costs this constituency's 45,586 households in a year between them — £92 each, about 51 days of one home's electricity.

The £92 per household is a national figure — identical in every GB seat. Only the seat total varies, with the number of households · NESO · how we worked this out

The waiting list

6 of 6 waiting projects · years since approval

Saxon House, Lower York Street - Solar Photovoltaic Panels

5.2 YRS

Test Valley Business Centre, Test Lane - Solar PV system 0.3 MW

3.7 YRS

Buildings J K And Z Tesla Centre, Herbert Walker Avenue - Solar Panels 0.8 MW

3.6 YRS

Asquith Nursery, David Lloyd Leisure - Solar Panels 0.3 MW

2.5 YRS

Southampton General Hospital, Tremona Road - Solar Panels 0.2 MW

2.5 YRS

Spire Hospital, Chalybeate Close - Solar Panels 0.2 MW

2.2 YRS

Every approved, unbuilt project

approved 24+ months ago, still not generating · planning database, July 2026

Site	Technology	Enough for	Capacity	Approved	Waiting
Buildings J K And Z Tesla Centre, Herbert Walker Avenue - Solar Panels	Solar Photovoltaics	300 homes	0.8 MW	2023-01	3.6 yrs
Test Valley Business Centre, Test Lane - Solar PV system	Solar Photovoltaics	100 homes	0.3 MW	2022-11	3.7 yrs
Asquith Nursery, David Lloyd Leisure - Solar Panels	Solar Photovoltaics	100 homes	0.3 MW	2024-01	2.5 yrs
Southampton General Hospital, Tremona Road - Solar Panels	Solar Photovoltaics	100 homes	0.2 MW	2024-02	2.5 yrs
Spire Hospital, Chalybeate Close - Solar Panels	Solar Photovoltaics	100 homes	0.2 MW	2024-05	2.2 yrs
Saxon House, Lower York Street - Solar Photovoltaic Panels	Solar Photovoltaics	—	— MW	2021-05	5.2 yrs

Plus 1 more approved within the last two years.

What this page does not show

Smaller wind farms on the local grid are also switched off; national data does not show it, so the £ figure here is a floor, not a zero. Offshore wind is counted nationally, never per seat. The planning database can run a quarter behind reality.

Electricity does not travel from a particular project to particular houses. Everything generated goes into the national grid and everyone draws from that shared pool, so "enough for X homes" is a way of sizing the electricity — not a claim that these homes would be powered by this site. Battery storage is counted separately from generation: it moves power in time rather than making it.

Planning statuses come from the government's planning database (REPD), which records what was decided and when, but not why. Where a project was refused we say so and name the authority; for the reasons, look up the planning reference on that council's own register. How to check any figure on this page →

Read the full method, including everything we cannot see →

What has Satvir Kaur said about the grid in Parliament? Search Hansard →

See the full league table Data (JSON)