Renewable planning › Battery storage › Gwynedd
Battery storage planning in Gwynedd
Gwynedd has decided 3 battery storage schemes and approved 67% of them, taking a median of 9.5 months to decide. Consented capacity: 157 MW.
⚠️ Small caseload (3 decided). Percentages here move a lot with one more decision — read them as indicative, not as a reliable rate.
How Gwynedd compares
Against the 137 UK authorities with 5+ battery storage decisions, Gwynedd sits in the 4th percentile for approval rate (25 points below the England average) and the 14th percentile for speed.
Decisions by year
Battery storage decisions by the year the decision was issued (Renewable Energy Planning Database). Withdrawn and still-undecided applications are excluded, so a short bar can mean a quiet year rather than a strict council.
Every recorded scheme (3)
| Scheme | MW | Status | Decided |
|---|---|---|---|
Tyddyn Forgan, Llanddeiniolen - Energy Storage System Firstway Energy / Net Zero Twenty Six Limited · C25/0266/18/LL · 9.7 mo to decide | 100 | Awaiting Construction | 2026-01-23 |
Seion, Pentir - Battery Energy Storage System Brockwell Storage & Solar Limited · C25/0277/18/LL · 9.5 mo to decide | 99.9 | Application Refused | 2026-01-23 |
Pentir Substation, Pentir - Battery Energy Storage Lightsource BP · C24/0532/25/LL · 2.2 mo to decide | 57 | Awaiting Construction | 2024-09-09 |
Does Gwynedd approve battery storage schemes?
Yes — of the 3 battery storage schemes Gwynedd has decided, 67% were approved (2 granted, 1 refused). The UK-wide rate for battery storage is 92%. Note this is a small caseload, so treat the percentage as indicative rather than statistically robust.
How long does a battery storage scheme application take in Gwynedd?
The median time from application to decision is 9.5 months, against a UK median of 6 months for battery storage. That is measured between the submission and decision dates recorded in REPD, so it reflects the whole determination period including any extensions.
How much battery storage capacity has Gwynedd consented?
157 MW has been consented across 2 approved schemes, with 100 MW refused. There are no applications currently awaiting a decision.
Other technologies in Gwynedd
Source: Renewable Energy Planning Database (REPD), Department for Energy Security and Net Zero, Open Government Licence v3.0 — 2026 Q1 extract. Approval rate is over decided applications only (approved ÷ approved+refused); withdrawn and undecided schemes are excluded. A permission later expired still counts as approved because consent was granted. REPD covers schemes of roughly 150 kW and above, is published quarterly, and does not record refusal reasons — so nothing here explains why a scheme was refused. Screening context for site selection, not planning advice.
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