Power plant · Welwyn Hatfield, England, United Kingdom
Tollgate Farm Battery Storage
Tollgate Farm Battery Storage is a power plant under construction in Welwyn Hatfield, England, United Kingdom, with 49.5 MW of capacity, operated by Brockwell Storage & Solar Limited, Harmony Energy Limited and Tag Energy UK.
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 | Welwyn Hatfield (coordinates), England | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Address | Tollgate Farm, Tollgate Road, North Mymms, AL4 0NY | 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 | 22 Jan 2019 (permit 6/2017/2340/FULL, Town and Country Planning Act, issued by Welwyn Hatfield) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Application date | 12 Oct 2017 (reference 6/2017/2340/FULL, planning authority Welwyn Hatfield) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Decision date | 22 Jan 2019 (granted, reference 6/2017/2340/FULL, planning authority Welwyn Hatfield) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Brockwell Storage & Solar Limited (RNA Energy / Harmony Energy Storage/ Tag Energy UK) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Harmony Energy Limited (RNA Energy / Harmony Energy Storage/ Tag Energy UK) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Tag Energy UK (RNA Energy / Harmony Energy Storage/ Tag Energy UK) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 49.5 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 | 51.7356, -0.2340 | 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 Welwyn Hatfield, reference 6/2017/2340/FULL)
- Permit applied for (planning authority Welwyn Hatfield, reference 6/2017/2340/FULL)
How it compares
Tollgate Farm Battery Storage is the 769th-largest of 2,174 power plants planned, permitted or under construction in England and the 1,224th-largest of 3,222 in the United Kingdom by capacity; its 49.5 MW is <0.1% of the 300,461 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 | 769th of 2,174 | 185,888 MW | <0.1% |
| United Kingdom | 1,224th of 3,222 | 300,461 MW | <0.1% |
| All power plants planned, permitted or under construction in our data | 2,306th of 6,455 | 664,040 MW | <0.1% |
Nearby
Within 50 km of this power plant: 133 data centers (1 operating, 88 MW), 95 substations, 38 grid connections (22 operating, 233 MW), 1 transmission line and 1 AI supercomputer, measured from the coordinates in the facts above. The table shows the nearest 9, up to 3 per kind.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| BT Computer Centre | Data center | — | — | 7.1 km |
| Colt London North Data Centre | Data center | — | — | 7.9 km |
| Hertfordshire Data Centre | Data center | — | — | 8.7 km |
| North London (Electricity Line) Reinforcement | Transmission line | — | Permitted | 20 km |
| Willesden GSP | Substation | — | — | 22 km |
| Acton Lane BSP | Substation | — | — | 22 km |
| Canal Bank 11kV Primary | Substation | — | — | 23 km |
| Harefield Solar grid connection | Grid connection | 30 MW | Planned | 23 km |
| Ariel Way White City London grid connection | Grid connection | 2.2 MW | Operating | 25 km |
Operators and place
More from Brockwell Storage & Solar Limited
- Peat Dykes Farm, Harrop Lane - Battery Energy Storage System100 MW · permitted
- Seion, Pentir - Battery Energy Storage System99.9 MW
- Dolphingstone Farm - Battery Energy Storage System63 MW · permitted
- Inchbean Farm, Treeswoodhead Road - Battery Energy Storage System60 MW · permitted
- Rush Green Motors - Battery storage50 MW
- Scawby Road - Solar Array49.9 MW · planned
- Sundridge Hill49.5 MW · under construction
- Scawby Road - Solar Array30 MW · planned
Other power plants in England
- Walpole Flexible Generation Project2,000 MW
- Outer Dowsing Offshore Wind Farm1,500 MW
- Hornsea 2 - Optimus and Breesea1,320 MW
- Hornsea 1 - Heron & Njord1,218 MW
- Atlantic Array One - Bristol Channel Zone1,200 MW
- Five Estuaries - Wind Farm1,080 MW
- Rugeley Power Plant Conversion1,000 MW
- Teesworks Battery Storage Project1,000 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.
- 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.
- SSEN Distribution. SSEN Distribution data portal, CC BY 4.0.