Renewable planning › Battery storage › Hertsmere
Battery storage planning in Hertsmere
Hertsmere has decided 2 battery storage schemes and approved 50% of them, taking a median of 10.3 months to decide. Consented capacity: 170 MW. 2 applications still awaiting a decision.
⚠️ Small caseload (2 decided). Percentages here move a lot with one more decision — read them as indicative, not as a reliable rate.
How Hertsmere compares
Against the 137 UK authorities with 5+ battery storage decisions, Hertsmere sits in the 1st percentile for approval rate (42 points below the England average) and the 11th percentile for speed.
Every recorded scheme (6)
| Scheme | MW | Status | Decided |
|---|---|---|---|
Hilfield Lane, Aldenham - Battery Energy Storage Penso Power (BW ESS) · 25/0153/FUL · 11.3 mo to decide | 170 | Awaiting Construction | 2026-01-16 |
Butterfly Lane, Elstree BESS - 99.9MW Battery Energy Storage System Greenfield Energy Developments Limited · 25/1070/FUL | 99.9 | Application Refused | 2025-07-18 |
Elstree Substation, Hilfield Lane - Battery Energy Storage Chiltern Renewables Hockliffe Limited · 23/1508/OUT | 400 | Application Withdrawn | 2024-11-21 |
Hilfield - Solar arrays & Battery storage Elstree Green Limited · 22/0948/FULEI | — | Application Withdrawn | 2024-05-31 |
Hilfield Solar Farm & Battery Storage Facility Elstree Green Limited · 21/0050/FULEI · 10.3 mo to decide | — | Revised | 2021-11-19 |
Hilfield Farm Tech Capbal · 18/1587/OUT · 9.6 mo to decide | 49.9 | Revised | 2019-05-28 |
Does Hertsmere approve battery storage schemes?
Yes — of the 2 battery storage schemes Hertsmere has decided, 50% were approved (1 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 Hertsmere?
The median time from application to decision is 10.3 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 Hertsmere consented?
170 MW has been consented across 1 approved scheme, with 100 MW refused. A further 2 applications awaits a decision.
Other technologies in Hertsmere
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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