| # | Plant | Fuel | Country | MW |
|---|---|---|---|---|
| 1 | Bieudron | Hydro | Switzerland | 1,260 |
| 2 | Nendaz | Hydro | Switzerland | 392 |
| 3 | Bitsch (Biel) | Hydro | Switzerland | 340 |
| 4 | Fionnay (Dixence) | Hydro | Switzerland | 306 |
| 5 | Châtelard-Vallorcine | Hydro | Switzerland | 260 |
| 6 | Riddes | Hydro | Switzerland | 258 |
| 7 | Stalden (KWM) | Hydro | Switzerland | 185 |
| 8 | Fionnay (Mauvoisin) | Hydro | Switzerland | 140 |
| 9 | Lavey | Hydro | Switzerland | 93 |
| 10 | Vernayaz (CFF) | Hydro | Switzerland | 92 |
| 11 | Zermeiggern | Hydro | Switzerland | 74 |
| 12 | Croix | Hydro | Switzerland | 66 |
| 13 | Fieschertal | Hydro | Switzerland | 64 |
| 14 | Monthey power station | Gas | Switzerland | 55 |
| 15 | Ardon | Hydro | Switzerland | 52 |
| 16 | Vissoie | Hydro | Switzerland | 50 |
| 17 | Reckingen | Hydro | Switzerland | 40 |
| 18 | Ackersand 1 | Hydro | Switzerland | 29 |
| 19 | Turtmann | Hydro | Switzerland | 24 |
| 20 | Martigny-Bourg | Hydro | Switzerland | 22 |
| 21 | Pont de la Tine | Hydro | Switzerland | 11 |
| 22 | Monthey (Tine) | Hydro | Switzerland | 10 |
| 23 | Champsec | Hydro | Switzerland | 9 |
| 24 | Oberems (Argessa) | Hydro | Switzerland | 8 |
| 25 | Massaboden | Hydro | Switzerland | 7 |
| 26 | Stalden (Kloster) | Hydro | Switzerland | 1 |
Method: ranked from open data — capacity & fuel from WRI Global Power Plant Database (CC BY 4.0); CO₂ measured for US EPA GHGRP / EU ETS records and modelled for Climate TRACE records. Sorted server-side; click any column to re-sort. Company-level data only.
Bieudron (Switzerland) ranks #1 with 1,260 mw.
This ranking covers 26 power plants in in Valais, Switzerland.
1. Bieudron (1,260); 2. Nendaz (392); 3. Bitsch (Biel) (340).
