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Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
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- Pipeline4,951
- Cement Plant3,513
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- Grid Storage965
- Iron Ore Mine949
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Chokepoints
Grid Storage
Glyn Rhonwy hydroelectric plant
12th-largest grid storage in United Kingdom of 12 · top 94% worldwide (#905 of 965)
- Owner
- Quarry Battery Company
- Status
- construction
- Capacity
- 100 MW
- Technology
- pumped storage
- Also listed as
- A power plant — this site generates as well as stores
Comparable grid storages · United Kingdom · 12 ranked
- #1Dinorwig hydroelectric plant2.0 GW
- #10Ffestiniog hydroelectric plant384 MW
- #11Foyers hydroelectric plant320 MW
- #12Glyn Rhonwy hydroelectric plant100 MW
Grid connection · within 50 km
- Nearest substation
- Penisarwaun Cable Compound
- Its voltage
- 400 kV
- Distance
- 3.3 km
- Strongest line nearby
- 400 kV
- Line operator
- National Grid
- Substations in range
- 8
Mapped grid infrastructure from OpenStreetMap, whose coverage is excellent in some regions and sparse in others. Nothing shown here means nothing is mappednearby — not that the site is unconnected. Lines are matched on a segment’s midpoint, so a corridor passing directly overhead can be missed; this under-reports rather than invents.
Co-located infrastructure · within 25 km
- Glyn Rhonwy hydroelectric plant0 m · Power Plant · 100 MW · hydro
- Dinorwig hydroelectric plant2.2 km · Power Plant · 2.0 GW · hydro
- Dinorwig hydroelectric plant2.2 km · Grid Storage · 2.0 GW
- 400 kV line3.3 km · Transmission Line
- Penisarwaun Cable Compound3.3 km · Substation / Converter
- Pentir-Trawsfynydd5.4 km · Transmission Line
- National Grid Deeside-Pentir7.1 km · Transmission Line
- Pentir Substation7.2 km · Substation / Converter
- Alaw Môn Solar Farm & Energy Storage Facility18 km · Power Plant · 160 MW · solar
- Ffestiniog hydroelectric plant20 km · Grid Storage · 384 MW
- Wern 400KV Cable Compound21 km · Substation / Converter
- Canatxx LNG Terminal22 km · LNG Terminal · 10 Mtpa
On the interactive map
Watercourse: Llyn Padarn
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)