How much solar power does Sion already produce?

837 solar installations with 33.2 MWp in total are listed in the Swiss Federal Office of Energy register. That is an estimated ~13% of the municipality's roof potential.

Where do these numbers come from?

From federal open data: the register of electricity production plants and the solar potential of Swiss municipalities (Swiss Federal Office of Energy), plus swisstopo municipal boundaries. We only show totals per municipality, never individual installations.

Can I start a LEG in Sion?

Yes. A local electricity community is possible in any municipality, as long as all participants are in the same grid area and close to each other. UpGrid handles registration, metering and billing.

All municipalities in the canton of Valais

Solar power · Canton of ValaisLEG forming

Solar power in Sion

837 solar installations with 33.2 MWp of capacity are installed in Sion.

Go to the community

Solar installations: 837
Installed capacity: 33.2 MWp
Roof potential in use: ~13%; Estimate
Rank in the canton of Valais: 29 of 122; by roof potential in use

Growth by build yearNew capacity installed per year in kWp

Roof potential

How much sun falls on the roofs of Sion

The suitable roofs of Sion could deliver around 263 GWh of solar power a year. An estimated ~13% of it is used today.

Roof potential per month (GWh)

A LEG is forming in Sion

A local electricity community is collecting sign-ups here. The more neighbours join, the sooner it starts.

Communities in Sion

OIKEN SA - Sion
Forming
Sion, VS

Communities nearby

OIKEN SA - Veysonnaz
Forming
Veysonnaz, VS
OIKEN SA - Vex
Forming
Vex, VS
OIKEN SA - Grimisuat
Forming
Grimisuat, VS

Join the LEG in Sion

Get solar power from your neighbourhood. Joining is free and you keep your electricity supplier.

Go to the community

Questions about solar power in Sion

How much solar power does Sion already produce?: 837 solar installations with 33.2 MWp in total are listed in the Swiss Federal Office of Energy register. That is an estimated ~13% of the municipality's roof potential.
Where do these numbers come from?: From federal open data: the register of electricity production plants and the solar potential of Swiss municipalities (Swiss Federal Office of Energy), plus swisstopo municipal boundaries. We only show totals per municipality, never individual installations.
Can I start a LEG in Sion?: Yes. A local electricity community is possible in any municipality, as long as all participants are in the same grid area and close to each other. UpGrid handles registration, metering and billing.

Sources: Swiss Federal Office of Energy (SFOE), swisstopo, opendata.swiss. As of October 2026. Totals per municipality only, no individual installations.

Build year	Installations	Capacity (kWp)
before 2012	16	220
2012	11	1’689
2013	15	1’524
2014	13	495
2015	20	2’209
2016	13	292
2017	29	932
2018	28	873
2019	43	1’601
2020	45	1’339
2021	38	1’401
2022	105	3’865
2023	208	6’614
2024	151	5’898
2025	87	3’559
2026	15	717

Month	GWh
Jan	7.9
Feb	13
Mar	22.1
Apr	28.4
May	32.8
Jun	35.9
Jul	36.3
Aug	31.2
Sept	24.6
Oct	16.4
Nov	8.7
Dec	5.7

Solar power in Sion

How much sun falls on the roofs of Sion

A LEG is forming in Sion

Communities in Sion

OIKEN SA - Sion

Communities nearby

OIKEN SA - Veysonnaz

OIKEN SA - Vex

OIKEN SA - Grimisuat

Join the LEG in Sion

Questions about solar power in Sion