Residential · 2026
Integrated solar roof · Rolle (VD)
Full-black in-roof system · modern architecture
Geneva · 35 to 50 km from Rolle
Solar and heat pumps — Geneva's left bank
Cologny, Vandœuvres, Anières, Vésenaz, Chêne-Bougeries, Versoix.
- Free on-site study
- Detailed quote within 7 days
- Cantonal subsidies handled
- Direct installer
Geneva's left bank is home to one of the most demanding residential markets in Switzerland — architect-designed villas, wine estates, embassies. Every installation we deliver in this area meets three non-negotiable criteria: visual discretion, acoustically silent heat pumps, and guaranteed continuity of service (many properties are second homes left unoccupied for months at a time).
Local proof
Our installations in canton Geneva.
57
57 completed installations
Breakdown by product
38 heat pumps
10 solar installations
3 batteries
2 AC units
2 EV chargers
Projects
Our projects in 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
Service area
Towns we serve — Geneva left bank.
Cologny
1223
Vandœuvres
1253
Anières
1247
Corsier
1246
Hermance
1248
Collonge-Bellerive (Vésenaz)
1245
Chêne-Bougeries
1224
Chêne-Bourg
1225
Thônex
1226
Versoix
1290
Local context
What to know about energy in Geneva left bank.
Climate & sunshine
Lake Geneva basin: 1,550-1,700 hours of sunshine a year, identical to La Côte. The prevailing winter wind (the bise) blows from the north-east — an important factor when positioning heat pump outdoor units, to avoid prolonged icing.
Architecture & constraints
High-end villas with complex roofs (mansards, dormers, multiple skylights) call for very detailed shading studies. Many buildings fall under cantonal architectural heritage protection — full-black or frameless in-roof integration is often a requirement.
Grid & connection
Grid operator: SIG (Services Industriels de Genève). A well-oiled connection procedure with typical lead times of 4-6 weeks. SIG also offers competitive buy-back contracts for surplus production.
I.ON advice
Our recommendations for Geneva left bank.
01
Heat pump acoustics — Geneva's rules
Geneva strictly enforces the federal Noise Abatement Ordinance (OPB). In sensitive residential zones (the left bank, Versoix), the heat pump must stay below 35 dB(A) at 4 m at night. Our go-to choices: Mitsubishi Ecodan Quiet, Daikin Altherma 3 R Silent, or a bespoke acoustic enclosure where space is tight.
02
Ground-source heat pumps for large estates
For villas with over 500 m² of garden and high heating demand (indoor pool, outbuildings), a ground-source heat pump with vertical boreholes delivers a stable COP of 4.5+ all year round. An investment of 50-80 kCHF, but a 10-12 year payback once cantonal grants and tax deductions are factored in.
03
Remote monitoring for second homes
If the villa stands empty for months at a time (a second home), remote supervision (app + SMS alerts) is essential. We systematically configure heat pump and PV control via a secure cloud platform, with immediate notification of any fault.
2026 subsidies
Grants available in Geneva left bank.
Pronovo one-off federal grant
Federal subsidy of ~320-380 CHF/kWp for small installations. One-off payment after commissioning.
GEnergie — Geneva's cantonal programme
The canton of Geneva funds the replacement of fossil-fuel boilers with heat pumps through GEnergie: grants range from 4,000 to 15,000 CHF depending on capacity and type. Can be combined with municipal grants (Cologny and Vandœuvres run their own bonus schemes).
Stackable insulation subsidy
Geneva offers insulation grants that can be combined with a heat pump installation. Combining roof insulation + PV + heat pump unlocks the whole-building renovation bonus (an extra 15-30%).
Exact amounts vary from year to year and depend on the specifics of each project. We always calculate the maximum combination of grants available when preparing your quote.
Frequently asked questions
FAQ — Geneva left bank.
What is the quietest heat pump for a villa in Cologny or Vandœuvres?
+
For strict OPB compliance in dense residential zones, we recommend the Mitsubishi Ecodan Quiet (32 dB(A) at 4 m) or the Daikin Altherma 3 R Silent. With a standard acoustic enclosure, these units sail through every SIG inspection.
Can you install PV on a heritage-listed villa in Geneva?
+
Yes, but full in-roof integration is required (no visible on-roof mounting). We work with the heritage department's advisory architects to validate each project before the formal application is filed. Processing typically takes 8-12 weeks.
Does I.ON serve Versoix, halfway between Geneva and Nyon?
+
Versoix sits squarely within our priority area — it is 20 minutes from our Rolle depot. No travel charges, and after-sales call-outs within 24 hours.
Our services
Everything we install in Geneva left bank.
Other regions we serve
I.ON operates across all of Western Switzerland.
Free quote
Free energy studyfor your home,no obligation.
On-site visit, consumption analysis, detailed cost simulation. Full quote delivered within seven days. If your project is not technically or financially viable, we tell you straight.
- 7 daysDetailed quote turnaround
- FreeOn-site study, no commitment
- 100 %Subsidy applications handled for you
