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Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
- LNG Terminal1,198
- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
- Export Terminal519
- Refinery279
- Storage / Tank Farm38
- Oil / Commodity Contract19
- Hydrogen Project18
- Carbon Capture (CCS)16
Chokepoints
Grid Storage
Dinorwig hydroelectric plant
Largest grid storage in United Kingdom of 12 · top 6% worldwide (#51 of 965)
- Operator
- ENGIE
- Owner
- ENGIE SA
- Status
- operating
- Capacity
- 2,016 MW
- Technology
- pumped storage
- Commissioned
- 1984
- 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
- #2Balmacaan Estate hydroelectric plant2.0 GW
- #3Earba hydroelectric plant1.8 GW
Grid connection · within 50 km
- Nearest substation
- Penisarwaun Cable Compound
- Its voltage
- 400 kV
- Distance
- 4.9 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
- Dinorwig hydroelectric plant0 m · Power Plant · 2.0 GW · hydro
- Glyn Rhonwy hydroelectric plant2.2 km · Power Plant · 100 MW · hydro
- Glyn Rhonwy hydroelectric plant2.2 km · Grid Storage · 100 MW
- 400 kV line4.9 km · Transmission Line
- Penisarwaun Cable Compound4.9 km · Substation / Converter
- Pentir-Trawsfynydd6.3 km · Transmission Line
- National Grid Deeside-Pentir7.9 km · Transmission Line
- Pentir Substation8.0 km · Substation / Converter
- Alaw Môn Solar Farm & Energy Storage Facility18 km · Power Plant · 160 MW · solar
- Ffestiniog hydroelectric plant18 km · Grid Storage · 384 MW
- Wern 400KV Cable Compound20 km · Substation / Converter
- Canatxx LNG Terminal23 km · LNG Terminal · 10 Mtpa
On the interactive map
Portfolio
Watercourse: Marchlyn Mawr
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)