The plant is rated at 900 MW and comprises six 150 MW pump turbines. Reported storage capacity is 20 million kWh; maximum turbine flow is 360 m³/s. The plant can switch from full-power pumping to full-power turbining in 5 minutes.
Reported status and procurement
Reported development
Water is pumped from the lower dam to the upper dam to store energy when electricity demand is low or renewable production exceeds demand; water passes through the turbines to meet peak demand.
Procurement availability
Unknown / not established
A source report alone does not establish current progress or an open buying window.
Project summary
Nant de Drance is a pumped-storage plant between the Emosson and Vieux Emosson reservoirs, with its power house cavern 600 metres underground. The source reports 900 MW total capacity across six 150 MW pump turbines and 20 million kWh of storage. It also reports a maximum turbine flow of 360 m³/s and a five-minute switch from full-power pumping to full-power turbining.
Evidence limits and unknowns
The supplied source snapshot, observed 2026-10-17, does not state procurement status, a buying schedule, financing, ownership or operator, or a next project milestone.
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Project metadata
Country
Switzerland Based on reviewed release evidence
Region
Europe
Category
Energy Derived from released evidence
Physical assets
Pumped Hydro
Based on this release's supporting evidence. Unresolved fields remain unclassified; these labels do not establish current progress or a buying window.
Released facts and supporting evidence
Each fact retains its source, uncertainty and time context. If a publisher page moves or is unavailable, use the recorded quotation and observation date below.
Project name
Source reported
Nant de Drance pumped storage power plant.
Attributed to www.nant-de-drance.ch.
Source: www.nant-de-drance.ch · publication date not recorded · observed 2026-10-17
Sources and evidence · www.nant-de-drance.ch
Source published: Not recordedObserved: 2026-10-17
The plant is rated at 900 MW and comprises six 150 MW pump turbines. Reported storage capacity is 20 million kWh; maximum turbine flow is 360 m³/s. The plant can switch from full-power pumping to full-power turbining in 5 minutes.
Attributed to www.nant-de-drance.ch.
Source: www.nant-de-drance.ch · publication date not recorded · observed 2026-10-17
Sources and evidence · www.nant-de-drance.ch
Source published: Not recordedObserved: 2026-10-17
Water is pumped from the lower dam to the upper dam to store energy when electricity demand is low or renewable production exceeds demand; water passes through the turbines to meet peak demand.
Attributed to www.nant-de-drance.ch.
Source: www.nant-de-drance.ch · publication date not recorded · observed 2026-10-17
Sources and evidence · www.nant-de-drance.ch
Source published: Not recordedObserved: 2026-10-17
Prior and superseded states remain labelled. Dates below identify source publication when known, otherwise source observation. They are not assumed event dates; each fact retains its own time qualifications.
No material timeline events have been released.
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