Free on-site study
Free visit, no obligation. Measurements, photos, calculations. If we consider your project is not technically or financially viable, we will tell you.
An independent installer,based in Rolle since 2020.
Our story
Materials, installation and monitoring.All under one roof.
I.ON was founded by Dr. Oscar Ax and engineer Jean-Paul Noujeim. Over a decade of combined experience in advising and implementing energy renovation projects in Switzerland.
Our conviction: every home and every budget is unique. We refuse standardised solutions. Our studies take into account real consumption, orientation, the existing heating system and the long-term ambitions of the owner.
We install everything ourselves, in-house. From the initial study to maintenance ten years after commissioning, it is our own technicians who intervene. This vertical integration allows us to contractually guarantee the performances announced in the quote.
Our headquarters are in Rolle, in the canton of Vaud. Our service areas cover Vaud, Geneva, Fribourg and Neuchâtel. Our technicians come from the regions they serve — a site visit is always a real commitment, and we ensure availability is an operational reality, not a marketing promise. Company details (registered name, trade register) are available in our legal notice.
In numbers
I.ON, in numbers.
+1,500
completed projects
96 %
measured customer satisfaction
5 years
in operation in Rolle
4 cantons
VD · GE · FR · NE
Our approach
Three principles that guide us.
Direct installer
Study, installation, commissioning and maintenance are all carried out by our in-house team. We guarantee the performances we announce because we control the entire chain.
Material selection
We source exclusively from recognised European market manufacturers. Inverters, panels, heat pumps, batteries — each component is validated for long-term reliability.
Paperwork included
We handle all administrative procedures: grid operator declarations, cantonal and federal subsidy applications, EPC files. You sign once.
Six trades
One team, six linked areas of expertise.
Our vertical integration is not a marketing argument: it is an organisational reality. Six complementary trades under one roof, a single point of contact for the client.
Solar panels
Study, sizing, on-roof or integrated installation. 10-year production monitoring.
View serviceHeat pumps
Air-to-water, geothermal, water-to-water. SIA thermal study, precise sizing, parameterised commissioning.
View serviceEV charging
11 and 22 kW residential stations, multi-charger fleet sites. Solar coupling and OCPP supervision.
View serviceAir conditioning
Daikin, Mitsubishi, Panasonic wall units. Silent installation, OPB compliance, permits managed.
View serviceBattery storage
Coupled to an existing or new PV installation. BYD, LG, Fronius. Self-consumption up to 80%.
View serviceEPC certificate
EnDK-certified expert. Official energy audit, 20-year action plan, subsidy support.
View serviceService areas
Four cantons, one base in Rolle.
Our headquarters are in Rolle, on Route de Gilly. This is our technical base, our materials stock, and the starting point for our teams. Our technicians live in the regions they serve: no long journeys, no last-minute rescheduling.
Vaud
Lausanne, Nyon, Morges, Yverdon, Riviera, Lavaux, Pied du Jura.
Geneva
City and surrounding area. Right and left bank, urban and rural communes.
Fribourg
Fribourg city, Bulle, Broye fribourgeoise, Glâne, Sarine, French-speaking Sense district.
Neuchâtel
Neuchâtel, La Chaux-de-Fonds, Val-de-Ruz, Val-de-Travers, Littoral.
Our commitments
What we commit to in writing.
Quote within 7 days
Detailed quote delivered within one week of the visit. Brands specified, warranties listed, administrative procedures costed.
Performance guarantee
For heat pumps, the designed seasonal COP is contractually guaranteed. If a measured discrepancy is found in the first season, we correct it.
10-year monitoring included
For solar installations, production monitoring is included for 10 years. Any abnormal drop is detected and addressed within 48 hours.
Subsidies handled
Cantonal building programme, Pronovo one-off remuneration, municipal aids. 100% of applications filed by us. No administrative burden for you.
OIBT compliance and Swiss standards
All our electrical installations comply with OIBT and receive a commissioning report. Document delivered at handover.
Our blog
Twenty practical guides to make informed decisions.
We regularly publish detailed analyses on solar panels, heat pumps, EPC certificates, EV charging and energy renovation in Western Switzerland. Real prices, field ranges, pitfalls to avoid — the content we wish we had found when we started.
