Glyn Rhonwy Pumped Storage Facility, Ffordd Clegir, Caernarfon, Gwynedd LL55 4EL Note: The site is currently brown field with no ability to receive post. As such this address uses the nearest current postcode. - 49.999 MW pumped storage facility in Gwynedd, North Wales.

Component ID: GRPH02

Last updated: 28 Jul 2025 16:43 UTC

Location:

Glyn Rhonwy Pumped Storage Facility, Ffordd Clegir, Caernarfon, Gwynedd LL55 4EL Note: The site is currently brown field with no ability to receive post. As such this address uses the nearest current postcode.

Company:

Snowdonia Pumped Hydro Limited_

CMU ID:

GRPH02

Technology:

Storage (Duration 7h)

Description:

49.999 MW pumped storage facility in Gwynedd, North Wales.

Auction:

2024-25 (T-4) Four Year Ahead Capacity Auction

Technical Capacity Information

Capacity Metrics

De-Rated Capacity (Component DB) N/A
De-Rated Capacity (CMU Registry) 47.32
Connection Capacity (CMU Registry) 50.00 MW
Anticipated Capacity (CMU Registry) 47.32 MW

Note: De-rated capacity typically accounts for availability factors. Connection capacity represents the maximum grid connection size. Values sourced from Component database or CMU Registry as indicated.

Contact & Ownership

Raw Component Data

Field	Value
_id	277581
Type	T-4
rank	0.0573088
CMU ID	GRPH02
Auction Name	2024-25 (T-4) Four Year Ahead Capacity Auction
Component ID	000002
Delivery Year	2024
De-Rated Capacity	(empty)
OS Grid Reference	SH 567 608
Location and Post Code	Glyn Rhonwy Pumped Storage Facility, Ffordd Clegir, Caernarfon, Gwynedd LL55 4EL Note: The site is currently brown field with no ability to receive post. As such this address uses the nearest current postcode.
Connection / DSR Capacity	(empty)
Primary Fuel of Component	(empty)
Generating Technology Class	Storage (Duration 7h)
Description of CMU Components	49.999 MW pumped storage facility in Gwynedd, North Wales.
Permitted on-Site Generating Unit	(empty)
Pre-Refurbishing De-Rated Capacity	(empty)
Post-Refurbishing De-Rated Capacity	(empty)
Generating Capacity of on-site Generating Unit	(empty)

Raw CMU Data

Field	Value
_id	11484
Type	T-4
CMU ID	GRPH02
Auction	Capacity Auction
Agent Name	(empty)
Beta Value	(empty)
Auction Name	2024-25 (T-4) Four Year Ahead Capacity Auction
CM Unit Name	GR2
CM Unit Type	CMRS
TEC Deferral	(empty)
Unproven DSR	(empty)
Delivery Year	2024
Opt Out Status	Opt-In
Opt-Out Reason	(empty)
Parent Company	Quarry Battery Company
DSR Test Method	(empty)
Is FCM required	(empty)
CM Unit Category	New Build Generating CMU
Storage Facility	Yes
De-Rated Capacity	47.319
Name of Applicant	Snowdonia Pumped Hydro Limited_
Primary Fuel Type	Storage - Pumped
Registered Holder	(empty)
Annual Penalty Cap	(empty)
Monthly Penalty Cap	(empty)
Proven DSR Capacity	(empty)
DSR Bidding Capacity	(empty)
Amount of Credit Cover	473190
Termination Fee 1 Rate	(empty)
Termination Fee 2 Rate	(empty)
Termination Fee 3 Rate	(empty)
Termination Fee 4 Rate	(empty)
Termination Fee 5 Rate	(empty)
Connection / DSR Capacity	49.999
Maximum Obligation Period	15
Capacity Agreement Awarded	(empty)
Pre-Qualification Decision	Not Prequalified
Capacity obligation Summary	(empty)
Pre-Refurbishing CMU Status	(empty)
Transmission / Distribution	Distribution
Unique Agreement Identifier	(empty)
New Build Yet to Satisfy FCM	(empty)
Planning Consents Conditions	(empty)
Anticipated De-Rated Capacity	47.319
Term of the Capacity Agreement	(empty)
Nature of the Security Interest	(empty)
CMU confirmed entry into Auction	(empty)
Is Connection Agreement required	(empty)
Pre-Refurbishment Bidding Status	(empty)
Secondary Trading Contact - Email	[email protected]
Date for provision of deferred TEC	(empty)
Pre-Refurbishing De-Rated Capacity	(empty)
Date of Issue of Capacity Agreement	(empty)
List of Traded Capacity Obligations	(empty)
Post-Refurbishing De-Rated Capacity	(empty)
Auction Acquired Capacity Obligation	(empty)
Date of Issue of DSR Test Certificate	(empty)
Has Capacity Agreement been Suspended	(empty)
Period for which the transfer applies	(empty)
Secondary Trading Contact - Telephone	'+447999552875
Capacity Agreement has been Terminated	(empty)
Duration of Capacity Agreement Awarded	(empty)
Date for Financial Commitment Milestone	(empty)
Delivery Years for which Agreement Valid	(empty)
Connection Agreement Deferral Declaration	(empty)
Date of Termination of Capacity Agreement	(empty)
Latest Date SCM is expected to be achieved	(empty)
Subject to Substantial Completion Milestone	(empty)
Subject to a Minimum Completion Requirement	(empty)
Earliest Date SCM is expected to be achieved	(empty)
Is copy of Grid Connection Agreement required	(empty)
Anticipated Pre-Refurbishing De-Rated Capacity	(empty)
Anticipated Post-Refurbishing De-Rated Capacity	(empty)
Legal Name of any Person with a Security Interest	(empty)
Date for provision of deferred Connection Agreement	(empty)
Duration of Capacity Agreement in First Bidding Round	(empty)
Long-Stop Date for the Minimum Completion Requirement	(empty)