SE

SEO

Société Électrique de l'Our

Vianden, Luxembourg

HydroWindEnergy StoragePublic company
Founded 19511.3 GW installed
Profile last updated: March 20, 2026

About

Founded in 1951, SEO is a public company headquartered in Vianden, Luxembourg specializing in Hydro, Wind, Energy Storage.

SEO is a Luxembourg power producer that operates the Vianden pumped storage plant for peak electricity generation and supplies grid stability services to the European interconnected network. It also runs run-of-river hydro plants, develops and operates wind parks through its participations, and holds stakes in several renewable energy companies.

Headquarters

Vianden, Luxembourg

Founded

1951

Company type

Public company

Focus areas

pumped storagehydropowerwind energypeak powergrid stabilityrenewable energy

Products & services

Business models

IPP

Value chain

DevelopmentEngineeringConstructionO&M

Locations

Headquarters

Vianden, Luxembourg

Projects

2

Vianden pumped storage plant, Machine 11

OperationalPumped storage hydropower

Eleventh pump-turbine unit added to the Vianden pumped storage plant, with reservoir capacity increased by 500,000 m3.

200 MW capacityVianden, Luxembourg

Wandpark Gemeng Hengischt

OperationalOnshore wind farm

Wind park operated by a stock corporation co-founded by SEO, located in the municipality of Heinerscheid.

Heinerscheid, Luxembourg

Credentials & affiliations

Partnerships

RWE Power, Enovos Luxembourg, CEGEDEL

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