Residential · 2026
Integrated solar roof · Rolle (VD)
Full-black in-roof system · modern architecture
Solar panel projectsin Western Switzerland.
Selection of installations completed by I.ON in the cantons of Vaud, Fribourg, Geneva and Neuchâtel. Residential, PPE and carports, between 4 and 30 kW depending on the project, as well as our heat pumps and our projects in German-speaking Switzerland.
I.ON since 2020
More than 500 installations completed in Western Switzerland.
+500
Completed installations
+4,6 MWp
Cumulative capacity
96 %
Customer satisfaction
4 cantons
VD · GE · FR · NE
Western Switzerland
Residential · 2025
Family villa · Puidoux (VD)
24 panels · 20 kW
Residential · 2025
Detached house · Forel (VD)
46 panels · 8 kW
PPE · 2023
Condominium · Bussigny (VD)
Collective PPE · 30 kW · lead-acid storage
PPE · 2025
Condominium · Cottens (FR)
Collective PPE · on-roof
Solar carport · 2025
Residential carport · St-Prex (VD)
21 panels · 4 kW
Residential · 2025
Family home · Pringy (FR)
27 panels · 6 kW
Residential · 2025
Integrated roof · Tannay (VD)
9 kW · lithium-ion storage
Residential · 2025
Detached house · Cottens (VD)
86 panels · 12 kW
Residential · 2023
Detached house · Denges (VD)
6 kW · thin-film · lithium-ion storage
Residential · 2023
Detached house · Sciernes (FR)
21 panels · 5 kW
German-speaking Switzerland
PV + battery · Sep 2023
PV + battery · Reinach (BL)
58.73 kWp · Jinko Tiger 435 · 32 kWh
PV + battery · Sep 2023
PV + battery · Dornach (SO)
25.5 kWp · Jinko Tiger 425 · 19.3 kWh
PV + battery · Sep 2023
PV + battery · Stein am Rhein (SH)
22.95 kWp · AXIperfect 425 · 16.6 kWh
Solar PV · Sep 2023
Solar PV · Reiden (LU)
14.08 kWp · Jinko Tiger 440
PV + battery · Oct 2023
PV + battery · Mülligen (AG)
12.62 kWp · Jinko Tiger 435 · 13.8 kWh
PV + battery · Oct 2023
PV + battery · Arlesheim (BL)
13.64 kWp · Jinko Tiger 440 · 11 kWh
Solar PV · Feb 2022
Solar PV · Holderbank (AG)
25.11 kWp · Trina 405
Solar PV · Oct 2022
Solar PV · Aarburg (AG)
21.73 kWp · Axitec 410
PV + battery · Aug 2022
PV + battery · Härkingen (SO)
12.3 kWp · JA-Solar 410 · 19.3 kWh
PV + battery · Oct 2022
PV + battery · Therwil (BL)
12.04 kWp · JA-Solar 415 · 13.8 kWh
Solar PV · Oct 2023
Solar PV · Seltisberg (BL)
12.18 kWp · Jinko Tiger 435
PV + battery · Apr 2022
PV + battery · Oftringen (AG)
5.7 kWp · SunPower 380 · 11 kWh
PV + battery · Oct 2023
PV + battery · Donatsch (BL)
11.18 kWp · AXIperfect 430 · 13.8 kWh
Solar PV · May 2022
Solar PV · Herbetswil (SO)
12.16 kWp · SunPower 380
Solar PV · Nov 2021
Solar PV · Bottmingen (BL)
10.13 kWp · Trina 405
Solar PV · Nov 2021
Solar PV · Bottmingen (BL)
12.87 kWp · LG NeON H 390
Solar PV · Oct 2021
Solar PV · Dornach (SO)
10.53 kWp · Trina 405
PV + battery · Apr 2022
PV + battery · Pratteln (BL)
7.29 kWp · Trina 405 · 11 kWh
PV + battery · Oct 2022
PV + battery · Oberwil (BL)
10.38 kWp · Longi 415 · 13.8 kWh
Solar PV · Mar 2022
Solar PV · Herbetswil (SO)
12.96 kWp · Trina 405
Solar PV · Sep 2021
Solar PV · Aarburg (AG)
7.7 kWp · Trina 385
Heating
Heat pumps we have installed.
Outdoor units, flat roofs, condominiums and fully renovated plant rooms: projects delivered by our own teams in Western Switzerland (Vaud, Fribourg, Valais) and German-speaking Switzerland (Basel, Aargau, Solothurn, Schwyz).
Western Switzerland
Heat pump · 2022
Family home · Domdidier (FR)
Air-to-water heat pump · outdoor unit in the garden
Heat pump · 2022
Chalet · Ollon (VD)
Mitsubishi Electric Ecodan air-to-water heat pump
Heat pump · 2024
Flat roof · Denges (VD)
alpha innotec air-to-water heat pump · among the solar panels
Heat pump · 2023
Detached house · Lutry (VD)
Vaillant aroTHERM plus air-to-water heat pump
Heat pump · 2025
Detached house · Romanel-sur-Lausanne (VD)
Bosch air-to-water heat pump
PPE · 2025
Condominium · Préverenges (VD)
Panasonic air-to-water heat pump · twin fans
Heat pump · 2025
Villa · Coppet (VD)
Air-to-water heat pump · garden integration
Heat pump · 2025
Detached house · Collombey (VS)
alpha innotec air-to-water heat pump
Heat pump · 2024
Cascade installation · Epalinges (VD)
Two Arkteos air-to-water heat pumps in cascade
Plant room · 2023
Renovated plant room · Gilly (VD)
Daikin hydraulic module · hot water tank
Plant room · 2023
Detached house · Lausanne (VD)
Oertli heat pump · indoor installation
Plant room · 2024
Complete plant room · Lonay (VD)
Oertli heat pump · domestic hot water tank
German-speaking Switzerland
Heat pump · 2026
Family home · Füllinsdorf (BL)
Vaillant aroTHERM air-to-water heat pump
Heat pump · 2025
Detached house · Holderbank (AG)
Vaillant aroTHERM plus air-to-water heat pump
Heat pump · 2026
Detached house · Riehen (BS)
Vaillant air-to-water heat pump · garden
Plant room · 2025
Renovated plant room · Altendorf (SZ)
Heat pump and hot water tank
Plant room · 2025
Detached house · Recherswil (SO)
Indoor heat pump installation
Plant room · 2024
Detached house · Liestal (BL)
Indoor heat pump · insulated air ducts
Our installations
Over 500 installationsmapped across Switzerland.
Solar, heat pumps, batteries and EV chargers: each point is a completed project. A continuously updated map, concrete proof of our expertise.
- completed installations
- 520
- installed solar capacity
- 4,6 MWc
- panels installed
- 10 595+
- cantons covered
- 12
Solar, heat pump, battery and EV charger installations completed by I.ON across 12 Swiss cantons: Aargau, Bern, Basel-Landschaft, Basel-Stadt, Fribourg, Geneva, Jura, Neuchâtel, Solothurn, Vaud, Valais, Zurich.
Case studies
Three projects in detail.
Beyond the images: what we actually do, what it costs, what it produces, and how much it saves year after year.
180 m² family villa in Puidoux (VD)
Replacement of 1998 oil boiler + 12 kWp on-roof solar installation + coupling with Daikin Altherma air-to-water heat pump.
- Gross investment
- CHF 62,000
- Cantonal subsidies
- CHF 12,500
- Tax deduction
- CHF 13,400
- Net effective cost
- CHF 36,100
- Annual savings
- ~CHF 3,200
- Estimated ROI
- 11 years
House moved from EPC class E to class B. Heating carbon footprint divided by 4. Winter comfort significantly improved.
6-unit condominium in Bussigny (VD)
Collective 30 kWp solar installation with shared self-consumption (RCP) and buffer storage. Approved by a simple majority at the owners' assembly.
- Total investment
- CHF 68,000
- Combined subsidies
- CHF 16,500
- Net after subsidies
- CHF 51,500
- Cost per unit
- ~CHF 8,600
- Self-consumption
- 78%
- Annual production
- 30 MWh
Common electricity charges reduced by 65% in the first year. All units agreed to join the RCP scheme, with automated monthly billing.
New build in Tannay (VD)
New construction with roof-integrated solar (9 kWp), geothermal heat pump (150 m boreholes), 10 kWh lithium-ion battery, EV charger coupled to solar.
- Gross investment
- CHF 118,000
- Cantonal subsidies
- CHF 16,000
- Tax deduction
- CHF 27,500
- Net effective cost
- CHF 74,500
- Summer autonomy
- 100%
- EPC class
- A
Minergie-A certified building. Near-autonomous 8 months out of 12. Electric car charged primarily on solar surplus.
How we work
Three things we do differently.
We install directly, never outsourced
The technicians who install your panels or heat pump are I.ON employees. No outsourced turnover, no diluted chain of responsibility. Our name is on the roof, and our team comes back if needed.
We say no when the project is not viable
A true north-facing roof, a roof in poor condition, a budget that does not cover quality installation: we say so during the site visit. It costs us jobs in the short term; it earns us trust in the long term.
We monitor production for 10 years
For solar installations, monitoring is included for 10 years. Any abnormal drop (panel, inverter, unanticipated shading) is detected and addressed. The performance we announced is the one we deliver.
