Hydropower plant operator in the Lower Engadin with 424 MW of installed capacity and its own workshop for plant operation and maintenance.
Engadiner Kraftwerke AG / Ouvras Electricas d'Engiadina SA
Zernez (headquarters, administration, workshop) · Pradella (power station 288 MW) · Martina (power station 70 MW) · Ova Spin (power station 50 MW)New on Amplifa
About Engadiner Kraftwerke AG
Engadiner Kraftwerke AG (EKW), headquartered in Zernez, operates hydropower plants in the Lower Engadin in Graubünden. The installed capacity is 424 MW, distributed across 13 machine groups, two of which are pump turbines: the Pradella power station (288 MW), Martina (70 MW), Ova Spin (50 MW) as well as feed-in stations with 4 MW; additionally, there is a 12 MW stake in the GKI. Net energy production in the 2024/25 financial year was 1'382 GWh (10-year average 1'312 GWh), at production costs of 4.87 Rp./kWh. In addition to operating and maintaining its plants, EKW carries out project management for refurbishments such as the ROKS retrofit of the upper power station stage, and maintains its own workshop in Zernez, where polymechanics are also trained. On the workshop roof, the company operates a winter photovoltaic system with 28.4 kW of capacity. The company employs 57 staff (50 full-time equivalents) and generated revenue of around CHF 98 million in the 2024/25 financial year.
- Site
- CH-7530 Zernez
- Processes
- Electricity generation (hydropower), Plant operation and maintenance, Project management/refurbishments (e.g. ROKS retrofit of the upper power station stage), Training (polymechanics apprentices), Stake in GKI (12 MW)
- Materials
- Hydropower (storage and pumped-storage operation), Winter photovoltaic system (vertically mounted bifacial modules)
- Certificates
- Operation and maintenance according to in-house plant standards
- Employees
- 57
- Industries
- Energy supply / Hydropower
- 01
Water intake and feed-in
- 02
Tunnel and pressure water conduits
- 03
Power plant operation (turbine/generator)
- 04
Pradella substation with 380/110 kV grid coupling transformers
- 05
Power supply
- 06
Maintenance and refurbishment in the company's own workshop
Operation, Maintenance and Projects
Hydropower (storage and pumped-storage operation)
Energy source with 424 MW installed capacity and 1'382 GWh net production in the 2024/25 financial year.
Winter photovoltaic system (vertically mounted bifacial modules)
28.4 kW on the workshop roof in Zernez, producing around 32'000 kWh per year, more than half of which in the winter half-year.
Plants and Sites
Zernez
CHHeadquarters, administration and workshop
- Workshop (polymechanics training)
- Winter photovoltaic system 28.4 kW (approx. 32'000 kWh/year)
Pradella
CHPower station site with substation
- 288 MW, incl. 2 pump turbines
- Substation with 380/110 kV grid coupling transformers
Martina
CHPower station site
- 70 MW
Ova Spin
CHPower station site
- 50 MW
Plants and Structures
Inside the production
Industries
Additional services
Operational Availability
EKW ensures high availability of its production facilities through continuous inspections, condition assessments of machines, overhauls (e.g. replacement of spherical valve seals, tunnel inspections) as well as the step-by-step retrofit and renewal of power plant components.
| Evidence | Zernez |
|---|---|
| Operation and maintenance according to in-house plant standards |
History
- 1966
Construction of the Via da S-charl pressure tunnel (historical image: miners, rails, concrete, steel scaffolding)
- 2024/25
71st annual report: production 5.38% above the long-term average, completion of the partner plant tax settlement 2010–2023, start of construction of the PCB remediation in the upper Spöl