How much solar power does Altendorf already produce?

247 solar installations with 6 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 Altendorf?

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 Schwyz

Solar power · Canton of SchwyzLEG forming

Solar power in Altendorf

247 solar installations with 6 MWp of capacity are installed in Altendorf.

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Solar installations: 247
Installed capacity: 6 MWp
Roof potential in use: ~13%; Estimate
Rank in the canton of Schwyz: 17 of 30; 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 Altendorf

The suitable roofs of Altendorf could deliver around 46 GWh of solar power a year. An estimated ~13% of it is used today.

Roof potential per month (GWh)

A LEG is forming in Altendorf

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

Communities in Altendorf

Elektrizitätsversorgung Altendorf AG - Altendorf
Forming
Altendorf, SZ

Communities nearby

EW Lachen AG - Lachen
Forming
Lachen, SZ
Gemeinde Galgenen, Elektrizitätsversorgung - Galgenen
Forming
Galgenen, SZ
Gemeinde Wangen SZ, Elektrizitätswerk - Wangen (SZ)
Forming
Wangen (SZ), SZ

Join the LEG in Altendorf

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

Go to the community

Questions about solar power in Altendorf

How much solar power does Altendorf already produce?: 247 solar installations with 6 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 Altendorf?: 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	2	34
2012	2	37
2013	3	49
2014	0	0
2015	7	390
2016	7	322
2017	6	259
2018	4	54
2019	13	322
2020	10	145
2021	16	462
2022	31	504
2023	64	1’506
2024	43	988
2025	37	873
2026	2	42

Month	GWh
Jan	1.2
Feb	2
Mar	3.8
Apr	5.1
May	5.8
Jun	6.2
Jul	6.5
Aug	5.8
Sept	4.2
Oct	2.7
Nov	1.4
Dec	1

Solar power in Altendorf

How much sun falls on the roofs of Altendorf

A LEG is forming in Altendorf

Communities in Altendorf

Elektrizitätsversorgung Altendorf AG - Altendorf

Communities nearby

EW Lachen AG - Lachen

Gemeinde Galgenen, Elektrizitätsversorgung - Galgenen

Gemeinde Wangen SZ, Elektrizitätswerk - Wangen (SZ)

Join the LEG in Altendorf

Questions about solar power in Altendorf