Residential · 2026
Integrated solar roof · Rolle (VD)
Full-black in-roof system · modern architecture
Neuchâtel · 100 to 130 km from Rolle
Solar and heat pumps in the canton of Neuchâtel
Neuchâtel, La Chaux-de-Fonds, Le Locle, Boudry, Peseux.
- Free on-site study
- Detailed quote within 7 days
- Cantonal subsidies handled
- Direct installer
The canton of Neuchâtel has two distinct faces: the lakeside shore (Neuchâtel, Boudry, Peseux, Cortaillod) with its temperate climate, and the Haut-Jura (La Chaux-de-Fonds, Le Locle) with harsh continental winters and a UNESCO-listed watchmaking heritage. Our solutions adapt accordingly: ground-source heat pumps for the higher altitudes, and meticulous architectural integration for the historic watchmaking districts.
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 — Neuchâtel & Haut-Jura.
Neuchâtel
2000
La Chaux-de-Fonds
2300
Le Locle
2400
Peseux
2034
Boudry
2017
Cortaillod
2016
Colombier
2013
Marin-Epagnier
2074
Saint-Aubin-Sauges
2024
Val-de-Travers (Couvet)
2108
Local context
What to know about energy in Neuchâtel & Haut-Jura.
Climate & sunshine
Lakeside (200-500 m): a temperate climate comparable to Lake Geneva, with 1,500-1,650 hours of sunshine a year. Haut-Jura (1,000 m+): a continental climate with winters of -8 to -15°C for several weeks a year and heavy snowfall (roof reinforcement is mandatory for PV). Fog is frequent along the shore in winter.
Architecture & constraints
La Chaux-de-Fonds is UNESCO-listed for its watchmaking town plan: its carefully laid-out chessboard roofscape means PV integration via solar tiles is mandatory within the listed perimeter. The lakeside (Boudry, Cortaillod, Auvernier) has many stone winegrowers' houses — on-roof mounting is possible, but full-black is required.
Grid & connection
Grid operators: Viteos (Neuchâtel + Peseux + Corcelles), Groupe E (eastern shore), SI Le Locle. Standard connection lead times of 4-6 weeks. Good capacity across the whole canton.
I.ON advice
Our recommendations for Neuchâtel & Haut-Jura.
01
High-temperature heat pumps for older buildings
Many villas and apartment buildings in the Haut-Jura (La Chaux-de-Fonds, Le Locle) have cast-iron radiators sized for 65-75°C. To keep the existing system without major renovation, we install high-temperature heat pumps (Daikin Altherma 3 H HT, Stiebel Eltron WPL 25 HT) that can deliver 70°C while still maintaining a respectable COP (2.5-3).
02
Snow-resistant PV
In La Chaux-de-Fonds and Le Locle, snow loads can exceed 250 kg/m². Always check the panels' snow-load rating (5,400 Pa minimum) and reinforce the mounting substructure. We work with Schletter / K2 frames tested in alpine conditions.
03
PV integration in the UNESCO zone of La Chaux-de-Fonds
The UNESCO perimeter of La Chaux-de-Fonds (the chessboard town centre) demands flawless integration. Grey-slate Sunstyle solar tiles are the most discreet solution. The cantonal heritage office signs off in advance — we manage the whole application.
2026 subsidies
Grants available in Neuchâtel & Haut-Jura.
Pronovo one-off federal grant
Federal subsidy of 320-380 CHF/kWp.
Buildings Programme — Neuchâtel
The canton of Neuchâtel channels the federal Buildings Programme and tops it up with cantonal grants for heat pumps, insulation and PV in whole-building renovations. The whole-building renovation bonus is particularly attractive for poorly insulated Haut-Jura villas.
Fossil-fuel heating replacement grant
The canton offers substantial grants for replacing oil or gas boilers with heat pumps. An additional bonus applies if the replacement happens before the existing system reaches the end of its technical life.
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 — Neuchâtel & Haut-Jura.
Does a heat pump work in La Chaux-de-Fonds at 1,000 m?
+
Yes, with the right precautions. Air-to-water heat pumps lose performance at -10°C and below. For the Haut-Jura we offer either a reinforced air-to-water unit with limited electric backup (perfectly acceptable when properly sized) or a ground-source (geothermal) heat pump that holds a COP of 4+ even in deep cold. The extra cost of geothermal is generally recouped in 8-10 years thanks to the higher COP.
Does I.ON serve La Chaux-de-Fonds despite the distance?
+
Yes. La Chaux-de-Fonds is 120 km from Rolle (1h45 by motorway). We deliver around ten projects a year there. For after-sales call-outs, we work with a certified local partner to guarantee a response time under 48 hours, at no extra cost to the client.
What solar yield can you expect in Neuchâtel?
+
Along the Neuchâtel shoreline (Neuchâtel, Boudry, Cortaillod), expect 950-1,050 kWh/kWp/year — comparable to Lake Geneva. In the Haut-Jura (La Chaux-de-Fonds, Le Locle), 900-1,000 kWh/kWp/year despite the altitude: cooler panels offset the winter cloud cover.
Our services
Everything we install in Neuchâtel & Haut-Jura.
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
