National Grid Substation (100 MW battery storage)
National Grid Substation is a 100 MW battery storage project in East Devon, England. Its status in the Renewable Energy Planning Database (July 2026 extract) is: approved on 22 August 2025, not yet built; the record was last updated on 10 September 2025.
100 MWbattery storage
approved, not builtstatus in REPD
10 September 2025record last updated
East Devoncouncil area
Planning timeline
| Date | Stage |
|---|---|
| 15 October 2024 | Application submitted |
| 22 August 2025 | Planning permission granted |
| 22 August 2028 | Permission due to expire (unless work starts) |
Project details
- Technology
- battery storage (stand-alone storage)
- Capacity
- 100 MW
- Status (REPD)
- approved, not built
- Record last updated
- 10 September 2025
- Operator or applicant
- Penso Power (BW ESS)
- Planning authority
- East Devon
- Planning application reference
- 25/0063/MFUL
- Address (REPD)
- E/O National Grid Substation, Broadclyst, Exeter
- Council area (by location)
- East Devon
- Time to decision
- 44 weeks
- Name in REPD
- National Grid Substation - Battery Energy Storage System
- REPD reference
- 17484
Who decides
| Applications | East Devon | UK |
|---|---|---|
| Decided applications (solar, wind, battery) | 55 | 10,236 |
| Refused | 17 (31%) | 19% |
| Solar refused | 9 of 36 | 12% |
| Battery storage refused | 8 of 19 | 16% |
| Median time from submission to decision | 21.0 weeks | 17.0 weeks |
| Appeals lodged / allowed | 5 / 3 | — |
Other large projects within 10 km
| Project | Type | MW | Status | km |
|---|---|---|---|---|
| Burrowton Farm | solar farm | 5 | operational | 0.9 |
| Crannaford Solar Farm | solar farm | 12.5 | operational | 1.1 |
| Saundercroft Solar Farm | solar farm | 7 | operational | 1.1 |
| Saundercroft Farm | battery storage | 290 | approved, not built | 1.1 |
| Saundercroft Road, Broadclyst | battery storage | 57 | approved, not built | 1.1 |
| Exeter Substation, Broadclyst | battery storage | 125 | approved, not built | 1.3 |
| Kerswell Barton Farm, Broadclyst | solar farm | 16.2 | approved, not built | 3.1 |
| Poltimore solar farm | solar farm | 5.5 | refused | 3.1 |
| Pithayes | solar | 5 | refused | 3.5 |
Status and dates as recorded in the Renewable Energy Planning Database (July 2026 extract); the database is compiled from public sources and can lag behind council decisions. Location: REPD grid reference (50.7678, -3.4131).