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Distribution / SPEN / Site

Glyn Rhonwy

Snowdonia Pumped Hydro (Quarry Battery Company) at Pentir

SPEN Embedded Capacity Register >1MW, September 2026 edition

Site, company and substation names are shown as they appear in the registers, including capitalisation.

Target energisation date
30 Jan 2025
Status
Accepted to connect
Customer
Snowdonia Pumped Hydro (Quarry Battery Company)
Site name
Glyn Rhonwy
Address
Glyn Rhonwy, Llanberis, Caernarfon, North Wales, LL55 4EL
Grid reference
Easting 257240, northing 360808
Licence area
Merseyside, Cheshire and North Wales (SPM)
Grid supply point
Pentir
Bulk supply point
Not stated
Primary substation
Not stated
Connection voltage
132 kV
Technology group
Storage
Energy source 1
Stored Energy, Storage - Mechanical - Pumped Hydro: 99.9 MW registered
Registered capacity
99.9 MW
Change to maximum export capacity
99.9 MW
Change to maximum import capacity
130 MW
Flexible connection
Not stated
In a connection queue
Yes
Date accepted
Not stated
Date connected
Not stated
Distribution reinforcement reference
Not published by SPEN
Transmission reinforcement reference
Not stated
Export MPAN
Not stated
Import MPAN
Not stated
Last updated
14 Sep 2020
Tracked since
March 2026 edition

Change history

Tracked since the March 2026 edition, across 7 editions.

Changes to its status, capacity, technology or customer, newest first.

No change to its status, capacity, technology or customer.

Also at Pentir

GSP view

12 other sites at this grid supply point in the September 2026 edition. In all, the sites here total 392 MW: 93 MW connected, 299 MW accepted to connect.

See all 12

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