Does this mean the municipality actually produces this much solar power?

Name: The municipalities with the greatest solar potential in Switzerland (2025)
Creator: Bundesamt für Energie (BFE)

No. It is the modelled potential of the available roof surfaces — the electricity they could generate if fully used. Actual installed photovoltaics produce far less. The figure comes from the BFE solar model and scales with how much roof area a municipality has.

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National ranking · Data 2025 · Source: BFS

The greatest solar potential in Switzerland

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Zurich (ZH) has the greatest solar-energy potential in Switzerland: its roofs could generate about 1'133 GWh of electricity a year. Next come Bern (561 GWh) and Basel (546 GWh). Because this is modelled roof potential, the large cities with the most roof area lead — it is not what these municipalities generate today. Source: BFE.

Top 100

BFE · 2025

Rank	Municipality	Roof potential	Canton	Residents
1	Zurich	1'133 GWh	ZH	433'989
2	Bern	561 GWh	BE	136'988
3	Basel	546 GWh	BS	176'329
4	Winterthur	466 GWh	ZH	119'315
5	Lausanne	434 GWh	VD	144'160
6	Geneva	420 GWh	GE	206'635
7	Lugano	364 GWh	TI	63'495
8	Bellinzona	358 GWh	TI	44'743
9	St. Gallen	323 GWh	SG	78'213
10	Sion	263 GWh	VS	36'624
11	Thun	260 GWh	BE	43'905
12	Biel/Bienne	254 GWh	BE	55'932
13	Lucerne	253 GWh	LU	85'534
14	Schaffhausen	219 GWh	SH	38'666
15	Köniz	212 GWh	BE	42'958
16	La Chaux-de-Fonds	202 GWh	NE	37'233
17	Chur	191 GWh	GR	38'949
18	Frauenfeld	191 GWh	TG	26'747
19	Mendrisio	186 GWh	TI	15'068
20	Neuchâtel	186 GWh	NE	44'898
21	Emmen	177 GWh	LU	32'380
22	Bulle FR	167 GWh	FR	26'749
23	Val de Bagnes	167 GWh	VS	10'814
24	Yverdon-les-Bains	166 GWh	VD	30'202
25	Martigny-Bourg	161 GWh	VS	21'759
26	Wil	157 GWh	SG	24'980
27	Sierre	157 GWh	VS	17'663
28	Uster	155 GWh	ZH	36'352
29	Val-de-Ruz	154 GWh	NE	17'499
30	Kloten	150 GWh	ZH	21'257
31	Meyrin	149 GWh	GE	26'882
32	Gossau	147 GWh	SG	18'454
33	Glarus Nord	147 GWh	GL	19'639
34	Rapperswil-Jona	146 GWh	SG	28'640
35	Vernier	146 GWh	GE	37'460
36	Langenthal	144 GWh	BE	16'077
37	Saanen	139 GWh	BE	6'962
38	Fribourg	137 GWh	FR	38'660
39	Crans-Montana	137 GWh	VS	10'488
40	Davos	134 GWh	GR	10'800
41	Burgdorf	133 GWh	BE	17'119
42	Baar	132 GWh	ZG	24'973
43	Val-de-Travers	128 GWh	NE	10'649
44	Altstätten	127 GWh	SG	12'456
45	Einsiedeln	126 GWh	SZ	16'464
46	Wetzikon	125 GWh	ZH	26'462
47	Dübendorf	124 GWh	ZH	31'506
48	Pratteln	124 GWh	BL	16'566
49	Oberriet	124 GWh	SG	9'291
50	Aarau	123 GWh	AG	22'290
51	Lyss	121 GWh	BE	16'406
52	Wädenswil	121 GWh	ZH	25'753
53	Kreuzlingen	120 GWh	TG	23'241
54	Zug	120 GWh	ZG	31'995
55	Baden	118 GWh	AG	23'587
56	Locarno	117 GWh	TI	16'394
57	Schwyz	116 GWh	SZ	16'181
58	Regensdorf	116 GWh	ZH	19'676
59	Grenchen	115 GWh	SO	18'295
60	Muttenz	115 GWh	BL	18'234
61	Hinwil	114 GWh	ZH	11'832
62	Weinfelden	114 GWh	TG	12'233
63	Conthey	112 GWh	VS	9'073
64	Dietikon	111 GWh	ZH	28'201
65	Volketswil	110 GWh	ZH	19'723
66	Monthey	109 GWh	VS	18'886
67	Wohlen	108 GWh	AG	17'481
68	Kriens	108 GWh	LU	29'632
69	Glarus Süd	107 GWh	GL	9'659
70	Amriswil	107 GWh	TG	14'643
71	Delémont	107 GWh	JU	12'739
72	Oftringen	107 GWh	AG	15'080
73	Lancy	106 GWh	GE	36'229
74	Willisau	105 GWh	LU	9'149
75	Olten	105 GWh	SO	18'715
76	Nendaz	103 GWh	VS	7'196
77	Aigle	102 GWh	VD	11'412
78	Estavayer	102 GWh	FR	10'296
79	Le Châtelard	101 GWh	VD	26'828
80	Ecublens	101 GWh	VD	13'320
81	Ollon	100 GWh	VD	8'159
82	Steffisburg	100 GWh	BE	16'467
83	Möhlin	100 GWh	AG	11'349
84	Satigny	100 GWh	GE	4'577
85	Brig-Glis	100 GWh	VS	13'976
86	Payerne	100 GWh	VD	10'545
87	Eschenbach	97 GWh	SG	10'169
88	Stabio	97 GWh	TI	4'485
89	Solothurn	96 GWh	SO	16'855
90	Arbon	95 GWh	TG	15'853
91	Murten	95 GWh	FR	9'531
92	Sarnen	95 GWh	OW	10'742
93	Illnau-Effretikon	95 GWh	ZH	17'679
94	Bülach	94 GWh	ZH	24'186
95	Uzwil	94 GWh	SG	14'279
96	Tafers	93 GWh	FR	7'900
97	Plan-les-Ouates	93 GWh	GE	12'221
98	Liestal	93 GWh	BL	15'834
99	Reinach	92 GWh	BL	20'258
100	Kirchberg	92 GWh	SG	9'755

Bundesamt für Energie (BFE), retrieved 10.08.2026

How we measure this

BFE

Modelled annual electricity that rooftop photovoltaics could produce across the whole municipality, in gigawatt-hours per year, from the BFE «Solarenergiepotenziale der Schweizer Gemeinden» model (2025 snapshot). It is a potential, not installed capacity or actual generation, and it scales with roof area — so large towns lead simply because they have more roofs. It is a rolling model snapshot, not an annual survey. The companion roofs-plus-façades scenario adds vertical surfaces.

Frequently asked questions

Does this mean the municipality actually produces this much solar power?: No. It is the modelled potential of the available roof surfaces — the electricity they could generate if fully used. Actual installed photovoltaics produce far less. The figure comes from the BFE solar model and scales with how much roof area a municipality has.