Which municipality in canton Aargau has the greatest solar potential?

Aarau, whose roofs could generate about 123 GWh of electricity a year (2025) — the greatest modelled roof potential of any municipality in canton Aargau.

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.

← Canton Aargau overview

Ranking · Data 2025 · Source: BFS

The greatest solar potential in canton Aargau

Name: Solar potential in canton Aargau (AG): full ranking (2025)
Creator: Bundesamt für Energie (BFE)

National ranking →

Aarau has the greatest solar-energy potential in canton Aargau: its roofs could generate about 123 GWh of electricity a year. Next come Baden (118 GWh) and Wohlen (108 GWh). This is modelled roof potential — largest where there is the most roof area, not current generation. Source: BFE.

Ranking

BFE · 2025

Rank	Municipality	Roof potential	Residents
1	Aarau	123 GWh	22'290
2	Baden	118 GWh	23'587
3	Wohlen	108 GWh	17'481
4	Oftringen	107 GWh	15'080
5	Möhlin	100 GWh	11'349
6	Rothrist	92 GWh	9'866
7	Wettingen	90 GWh	21'479
8	Zofingen	89 GWh	12'796
9	Lenzburg	83 GWh	11'184
10	Brugg	82 GWh	13'288
11	Villmergen	81 GWh	8'132
12	Rheinfelden	79 GWh	13'854
13	Spreitenbach	72 GWh	12'512
14	Reinach	70 GWh	9'499
15	Suhr	66 GWh	11'340
16	Muri	66 GWh	8'602
17	Zurzach	65 GWh	8'237
18	Bremgarten	63 GWh	8'834
19	Sins	60 GWh	4'468
20	Oberentfelden	56 GWh	8'907
21	Gränichen	54 GWh	8'625
22	Frick	54 GWh	5'741
23	Würenlingen	53 GWh	5'120
24	Buchs	53 GWh	8'429
25	Menziken	53 GWh	8'400
26	Seon	51 GWh	5'571
27	Aarburg	49 GWh	8'891
28	Rupperswil	47 GWh	6'041
29	Kaiseraugst	44 GWh	5'544
30	Windisch	42 GWh	8'060
31	Kölliken	42 GWh	5'035
32	Untersiggenthal	41 GWh	7'615
33	Lupfig	41 GWh	3'359
34	Merenschwand	40 GWh	3'794
35	Schafisheim	40 GWh	3'137
36	Küttigen	40 GWh	6'857
37	Safenwil	39 GWh	4'564
38	Möriken-Wildegg	39 GWh	4'888
39	Obersiggenthal	38 GWh	8'881
40	Brittnau	38 GWh	4'257
41	Laufenburg	38 GWh	3'800
42	Würenlos	37 GWh	6'830
43	Hunzenschwil	37 GWh	4'415
44	Kaisten	37 GWh	2'948
45	Mellingen	36 GWh	6'170
46	Birr	35 GWh	4'718
47	Döttingen	35 GWh	4'473
48	Böttstein	35 GWh	4'305
49	Niederlenz	35 GWh	4'896
50	Unterentfelden	34 GWh	4'579
51	Boswil	34 GWh	3'124
52	Strengelbach	33 GWh	5'104
53	Böztal	33 GWh	2'896
54	Gontenschwil	32 GWh	2'182
55	Seengen	32 GWh	4'411
56	Muhen	32 GWh	4'112
57	Schöftland	32 GWh	4'555
58	Gebenstorf	32 GWh	5'761
59	Schinznach	31 GWh	2'430
60	Stein	31 GWh	3'504
61	Fislisbach	30 GWh	6'090
62	Murgenthal	30 GWh	3'101
63	Mettauertal	30 GWh	2'158
64	Klingnau	29 GWh	3'673
65	Gipf-Oberfrick	29 GWh	3'878
66	Unterkulm	29 GWh	3'600
67	Erlinsbach	28 GWh	4'563
68	Villigen	28 GWh	2'139
69	Dottikon	28 GWh	4'160
70	Eiken	28 GWh	2'447
71	Lengnau	27 GWh	2'929
72	Leibstadt	27 GWh	1'596
73	Sarmenstorf	27 GWh	3'118
74	Beinwil am See	27 GWh	3'601
75	Mägenwil	27 GWh	2'215
76	Neuenhof	27 GWh	9'087
77	Meisterschwanden	27 GWh	3'267
78	Ehrendingen	26 GWh	4'906
79	Berikon	26 GWh	4'934
80	Zufikon	26 GWh	4'917
81	Magden	26 GWh	3'899
82	Birmenstorf	26 GWh	3'040
83	Leuggern	26 GWh	2'404
84	Oberkulm	26 GWh	2'999
85	Waltenschwil	25 GWh	3'159
86	Othmarsingen	25 GWh	3'155
87	Niederwil	24 GWh	3'042
88	Dintikon	24 GWh	2'432
89	Widen	24 GWh	3'876
90	Herznach-Ueken	24 GWh	2'634
91	Hägglingen	24 GWh	2'529
92	Auw	24 GWh	2'290
93	Oberrohrdorf	23 GWh	4'255
94	Endingen	23 GWh	2'703
95	Reitnau	23 GWh	1'627
96	Bergdietikon	23 GWh	2'946
97	Rudolfstetten-Friedlisberg	23 GWh	4'599
98	Staufen	23 GWh	4'306
99	Zeiningen	22 GWh	2'547
100	Stetten	22 GWh	2'496
101	Oberwil-Lieli	21 GWh	2'605
102	Wallbach	21 GWh	2'081
103	Bözberg	21 GWh	1'670
104	Niederrohrdorf	20 GWh	4'648
105	Hausen	19 GWh	3'796
106	Fahrwangen	19 GWh	2'497
107	Aristau	19 GWh	1'646
108	Dürrenäsch	19 GWh	1'373
109	Vordemwald	18 GWh	2'013
110	Jonen	18 GWh	2'351
111	Sisseln	18 GWh	1'666
112	Beinwil (Freiamt)	17 GWh	1'279
113	Schmiedrued	17 GWh	1'152
114	Veltheim	17 GWh	1'563
115	Remetschwil	17 GWh	2'113
116	Staffelbach	16 GWh	1'344
117	Hirschthal	16 GWh	1'756
118	Koblenz AG	16 GWh	1'759
119	Egliswil	16 GWh	1'544
120	Schneisingen	16 GWh	1'562
121	Bünzen	15 GWh	1'233
122	Oberrüti	15 GWh	1'600
123	Künten	15 GWh	1'917
124	Zetzwil	15 GWh	1'394
125	Uerkheim	15 GWh	1'433
126	Wölflinswil	15 GWh	1'041
127	Teufenthal	15 GWh	1'748
128	Full-Reuenthal	14 GWh	994
129	Tegerfelden	14 GWh	1'290
130	Wittnau	14 GWh	1'411
131	Oberlunkhofen	14 GWh	2'193
132	Bellikon	14 GWh	1'592
133	Hendschiken	14 GWh	1'351
134	Auenstein	14 GWh	1'728
135	Ennetbaden	14 GWh	3'672
136	Fischbach-Göslikon	14 GWh	1'706
137	Mühlau	13 GWh	1'336
138	Wegenstetten	13 GWh	1'023
139	Gansingen	13 GWh	1'097
140	Holderbank	13 GWh	1'489
141	Rüfenach	13 GWh	874
142	Arni	13 GWh	1'898
143	Boniswil	12 GWh	1'751
144	Killwangen	12 GWh	2'242
145	Dietwil	12 GWh	1'445
146	Wohlenschwil	12 GWh	1'867
147	Buttwil	12 GWh	1'276
148	Schlossrued	12 GWh	873
149	Zeihen	12 GWh	1'276
150	Birrwil	12 GWh	1'389
151	Brunegg	12 GWh	907
152	Zuzgen	12 GWh	897
153	Oeschgen	11 GWh	1'176
154	Münchwilen	11 GWh	1'070
155	Hallwil	11 GWh	1'021
156	Tägerig	11 GWh	1'544
157	Biberstein	11 GWh	1'644
158	Unterlunkhofen	11 GWh	1'629
159	Hellikon	11 GWh	839
160	Remigen	11 GWh	1'385
161	Thalheim	11 GWh	931
162	Kirchleerau	11 GWh	935
163	Villnachern	11 GWh	1'677
164	Holziken	10 GWh	1'742
165	Schupfart	10 GWh	883
166	Densbüren	10 GWh	771
167	Riniken	10 GWh	1'555
168	Leutwil	9 GWh	752
169	Bettwil	9 GWh	695
170	Eggenwil	9 GWh	1'031
171	Bottenwil	9 GWh	868
172	Birrhard	9 GWh	921
173	Obermumpf	9 GWh	1'072
174	Fisibach	9 GWh	590
175	Mumpf	9 GWh	1'549
176	Mülligen	9 GWh	1'078
177	Moosleerau	9 GWh	957
178	Oberhof	8 GWh	580
179	Abtwil	8 GWh	1'063
180	Rottenschwil	8 GWh	946
181	Freienwil	8 GWh	1'116
182	Büttikon	8 GWh	1'144
183	Besenbüren	7 GWh	639
184	Schwaderloch	7 GWh	723
185	Ammerswil	6 GWh	795
186	Siglistorf	6 GWh	721
187	Leimbach	6 GWh	533
188	Kallern	6 GWh	407
189	Mandach	5 GWh	346
190	Islisberg	5 GWh	690
191	Mönthal	5 GWh	405
192	Mellikon	5 GWh	237
193	Uezwil	5 GWh	549
194	Olsberg	5 GWh	367
195	Geltwil	4 GWh	232
196	Habsburg	4 GWh	435
197	Wiliberg	3 GWh	166

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

Which municipality in canton Aargau has the greatest solar potential?: Aarau, whose roofs could generate about 123 GWh of electricity a year (2025) — the greatest modelled roof potential of any municipality in canton Aargau.
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.