Grid Storage

Coo I hydroelectric plant

Belgium

2nd-largest grid storage in Belgium of 3 · top 68% worldwide (#655 of 965)

Owner
ENGIE SA
Status
operating
Capacity
474 MW
Technology
pumped storage
Commissioned
1972
Also listed as
A power plant — this site generates as well as stores

Comparable grid storages · Belgium · 3 ranked

All grid storages in Belgium

Grid connection · within 50 km

Nearest substation
Coo
Its voltage
380 kV
Distance
19 m
Strongest line nearby
380 kV
Line operator
Elia
Substations in range
9

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

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SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)