Power plant · Braintree, England, United Kingdom
Slamseys Energy Storage
Slamseys Energy Storage is a battery storage plant under construction in Braintree, England, United Kingdom, with 10 MW of capacity, operated by Gridserve Energy Storage.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | Braintree (coordinates), England | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Address | Land North Of Slamseys Farm, Blackley Lane, Great Notley, Essex, CM77 7QW | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Status | Under construction | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Permit date | 15 Sept 2017 (permit 17/01235/FUL, Town and Country Planning Act, issued by Braintree) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Application date | 6 Jul 2017 (reference 17/01235/FUL, planning authority Braintree) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Decision date | 15 Sept 2017 (granted, reference 17/01235/FUL, planning authority Braintree) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Gridserve Energy Storage | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 10 MW | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Technology | Battery (stand-alone storage) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Coordinates | 51.8512, 0.5269 | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
Research on this power plant and its operator.Who owns it up to the parent company, its grid connection and planning status, and an introduction to the operator.
Request researchLatest events
Dated events about this power plant from official notices and registers, newest first. All recent changes.
- Construction started
- Permit granted (planning authority Braintree, reference 17/01235/FUL)
- Permit applied for (planning authority Braintree, reference 17/01235/FUL)
How it compares
Slamseys Energy Storage is the 1,156th-largest of 1,650 power plants planned, permitted or under construction in England and the 1,857th-largest of 2,548 in the United Kingdom by capacity; its 10 MW is <0.1% of the 279,068 MW of power plants planned, permitted or under construction we hold for the United Kingdom. It is not built yet, so it is ranked among the power plants planned, permitted or under construction in our data, apart from the ones running today. Ranks and totals cover the ones that report their capacity.
| Within | Rank | Total | Share |
|---|---|---|---|
| England | 1,156th of 1,650 | 171,264 MW | <0.1% |
| United Kingdom | 1,857th of 2,548 | 279,068 MW | <0.1% |
| All power plants planned, permitted or under construction in our data | 4,945th of 5,799 | 657,076 MW | <0.1% |
Nearby
Within 50 km of this power plant: 16 data centers (1 operating, 88 MW), 2 transmission lines and 1 AI supercomputer, measured from the coordinates in the facts above. The table shows the nearest 6, up to 3 per kind.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| Bramford to Twinstead | Transmission line | — | Permitted | 28 km |
| NVIDIA Cambridge-1 | AI supercomputer | 202 H100e | Operating | 29 km |
| Kao Data KLON-02 | Data center | — | — | 29 km |
| Kao Data KLON-01 | Data center | — | — | 29 km |
| Imperium 315 | Data center | — | — | 30 km |
| North London (Electricity Line) Reinforcement | Transmission line | — | Permitted | 48 km |
Operator and place
Other power plants in England
- Drax Power Station Biomass Units2,580 MW
- Ratcliffe-on-Soar2,021 MW
- Cottam2,000 MW
- Walpole Flexible Generation Project2,000 MW
- West Burton2,000 MW
- Eggborough1,960 MW
- Staythorpe1,828 MW
- Fiddler’s Ferry1,510 MW
Data on this page
- Contains public sector information licensed under the Open Government Licence v3.0. DESNZ Renewable Energy Planning Database (REPD), Open Government Licence v3.0.
- Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
- Epoch AI. Epoch AI supercomputers, CC BY 4.0.
- Bundesnetzagentur, Marktstammdatenregister. Marktstammdatenregister, DL-DE-BY-2.0.
- © OpenStreetMap contributors. OpenStreetMap data centers, ODbL 1.0.
- Contains public sector information licensed under the Open Government Licence v3.0. Planning Inspectorate: National Infrastructure Projects, Open Government Licence v3.0.
- RVO SDE(+)(+) projecten in beheer and SDE viewer. RVO SDE(+)(+) projecten in beheer and SDE viewer, Free reuse, no attribution required.
- Wikidata. Wikidata, CC0 1.0.