Battery storage · United Kingdom
Seion, Pentir - Battery Energy Storage System
Application Refused99.9 MWChecked 6 October 2026Last changed in the dataset 25 March 2026
The site
- Technology
- Battery storage (Stand-alone Storage)
- Capacity
- 99.9 MW
- Status
- Application Refused (Planning Permission Refused)
- Operator or applicant
- Brockwell Storage & Solar Limited
- Location
- S/O B4547 Seion, Pentir, Llanddeiniolen, Caernarfon, Gwynedd, LL55 3AN, United Kingdom
- Planning authority
- Gwynedd
- Planning application
- C25/0277/18/LL
View on OpenStreetMap. The larger dot is this site; the others are sites within 40 km.
Timeline
- 8 April 2025 Planning application submitted
- 23 January 2026 Planning permission refused
Incidents on the register at this site
None found. The register holds no published incident that names Seion, Pentir - Battery Energy Storage System. If you know of one, report it (confidential reports are anonymised).
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Incidents at battery storage sites in the United Kingdom
The register holds 14 incidents at battery storage sites in the United Kingdom, 9 of them fires, and 177 worldwide. Counts of incidents in published reporting, not rates.
- Fire in home battery storage system connected to solar panels
- Gas leak at Cockenzie battery storage site under construction
- Short circuit in lithium battery cells reported as cause of fire at Rufford Colliery BESS
- Smoke and fire incident at Battery Box, Pinhoe Road, Exeter
- Battery storage site fire in East Tilbury brought under control after 24 hours
What fails at battery storage sites · All battery storage incidents
Own, insure or lend to this site or others like it? A portfolio safety record checks every site in a list against the register, free; the paid records add the site, operator, cause, downtime and loss behind each incident.
Contains public sector information licensed under the Open Government Licence v3.0 (Renewable Energy Planning Database, Department for Energy Security and Net Zero). The dataset. The register adds only the incidents and the counts.