COMPLETE PV SYSTEMS · OPTIONAL STORAGE
The Canton of Geneva offers a very attractive PV environment with around 1,900 sunshine hours, high household electricity prices (30–32 Rp./kWh), and an active utility (SIG). In 2026 SIG pays a fixed 10.96 Rp./kWh for fed-in solar electricity (up to 100 kWc) and, from 1 Jan 2026, tops up the Pronovo one-time payment via the Prime solaire (25% for 2 to <30 kWc, 15% for 30 to 100 kWc) plus a battery storage contribution of CHF 130/kWh. Pronovo, ZEV models, and the full tax deduction apply on top.
Geneva is the only Romande canton with a dominant full-service utility: SIG bundles electricity, gas, water, district heating, and telecom. This greatly simplifies ZEV projects and neighbourhood solutions because all grid questions are answered by a single partner.
Figures with sources
Here is the guide price, with its source. What a system on your roof earns, we calculate for you in about 2 minutes.
Guide price, single-family home
5–10 kWp rooftop · incl. 8.1% VAT
CHF 14,500–23,300
Reference curve of the SFOE price survey 2025. A market comparison, not a quote; without battery, roof renovation and meter cabinet. BFE 2025
Your detailed report
From your address, roof and consumption, with the incentives of your canton. We send the report by email straight away.
Free and non-binding · no sharing with third parties · no unsolicited calls
Costs
Example: 5–10 kWp rooftop PV: CHF 14,500–23,300. Incl. 8.1% VAT, before incentives and tax deductions, without a battery. Calculated with the reference curve of the SFOE price survey (CHF 1,628 per kW plus CHF 5,278): the range reflects different system sizes. A market comparison, not a quote.
Roof renovation, structural reinforcement and replacement of the meter cabinet are not included. Roof access, electrical work and planning can change the price. Your specific quote follows the property assessment.
Costs with calculation and sourcesSizing
A typical household using around 4,000 kWh per year needs roughly 25 m² of module area (Swissolar, February 2024). As a starting figure, global irradiation in Canton Genf is 1,317 kWh/m² per year (MeteoSwiss, Genève/Cointrin station, 1991 to 2020 average). Whether that works on your roof in Genf depends on orientation, pitch and shading — not on the floor plan.
Two federal bonuses explicitly do not apply to a single-family home: the winter electricity bonus requires at least 100 kW, and the tilt bonus at least 75 degrees of pitch. Neither applies to an ordinary pitched roof. Counting on them makes the business case look better than it is.
Clarify notification and permission before installationStorage
Battery storage earns its money through self-consumption. Electricity you use yourself saves not only the energy price but also grid fees and levies — which is why it is worth more than exported electricity. That is what decides whether a battery pays off.
Since 1 January 2025, an association for self-consumption (ZEV) may also use the existing connection lines. This makes apartment buildings and neighbourhood setups considerably cheaper, as no dedicated line is required. The grid operator depends on the municipality; in the Canton of Genf they include SIG (Services Industriels de Genève).
When battery storage makes senseServices
PV system, heat pump, storage, wallbox and monitoring from one team. Every service is planned as part of a working energy system.
01 · Roof & facade
We review roof, structure, shading, cable routing, inverter and grid connection. Then we create a technically reliable quote.
Roof review · Coordination of electrical work · Handover
01 / 05
Components by
Process
We clarify roof, electrical work, incentives and expansion path before you receive a quote. No site chaos, no wishful math.
Your key details are enough for a first, honest orientation. No appointment, no obligation.
We measure the roof by drone and clarify electrical work, regulations and the grid operator.
You see every line item individually, realistic ranges and sensible options such as storage or a wallbox.
Planning and installation by Vigorek. Electrical connection, grid registration and commissioning are handled by an electrical contractor licensed under the NIV. We coordinate schedules and documents.
From installation practice
Hooks and rails disappear under the modules. That is exactly where it is decided whether a system holds and the roof stays watertight. Marc Hammerschmidt has installed roofs like these himself and recorded the work on his phone.
Site diary · one tiled roof
Hooks come first. They sit under the tiles and later carry rails, modules, wind and snow.
Aluminium rails go onto the hooks. Where they end is decided in the plan, not on the roof.
By day four, the field is in place. When hooks and rails are right, the joints run straight by themselves.
More roofs
Where this footage comes from. Installations Marc Hammerschmidt worked on himself. To protect the owners, we do not name the location or the client.
Your installation. We document it the same way: every step with date and image, as part of your system records.
The Founders
You know before signing who calculates your project and who builds it: two founders, one for engineering, one for finance. A solar system only works long-term when both fit together from the start.
Christian Freiberger
CFA · former KPMG Senior Manager
Co-Founder · Strategy & Finance
Independent management consultant since 2015, previously Senior Manager at KPMG. Most recently Interim Treasury Manager at an energy storage manufacturer. Christian brings the financial structure: liquidity planning, transparent calculations and no project whose numbers don’t add up.
Marc Hammerschmidt
B.Eng. Mechanical Engineering
Co-Founder · Engineering & Planning
Marc handles the technical side: planning, structural analysis and system integration. He has helped install systems on roofs himself and plans so that nothing has to be improvised on the roof.
Clarity before commitment
Canton check
Many projects start with a rough roof idea. We translate it into a verifiable concept with layout plan, cable routes, safety logic and documented handover.
Canton Genf has its own rules for subsidies, permits and grid connection. We check them before quoting and record them in the project documentation.
Global irradiation in Canton Genf: 1,317 kWh/m² per year (MeteoSwiss, Genève/Cointrin station, 1991 to 2020 average).
Relevant grid operators in the canton: SIG (Services Industriels de Genève). Metering concept and registration are clarified before execution.
Roof-mounted systems on standard buildings in Geneva require notification but no permit – the construction notice (avis d'ouverture de chantier) must be filed at least 14 days before work starts. For listed objects, systems in the Zone de protection du vieux Genève, and facade installations on protected buildings, a building permit is required. The Office cantonal de l'énergie (OCEN) provides guidance; an OCEN subsidy request must reach the office at least 14 days before construction begins.
Geneva is shaped by Services Industriels de Genève (SIG). From 1 Jan 2026, the SIG Prime solaire tops up the Pronovo one-time payment: 25% for systems of 2 to <30 kWc and 15% for 30 to 100 kWc. There is also an SIG battery storage contribution of CHF 130/kWh (max. 15 kWh). The SIG feed-in tariff is a fixed 10.96 Rp./kWh in 2026 (systems up to 100 kWc). ZEV and contracting models apply on top. For private owners, Pronovo and the full tax deduction are the main pillars.
Your key details produce a first orientation on price range, incentives and payback. That is the basis on which we talk about your project.
Direct contact
Roof plans, photos or an existing quote are easiest to send us by email or WhatsApp.
Phone
Location
Kirchweg 32, 8102 Oberengstringen, Zürich, CH
Coverage
Planning and installation of photovoltaics in the Zurich region, Limmat Valley and eastern Aargau. Electrical work by a partner with an installation licence.
Core services
The key services, tailored directly to Genf and the local requirements in your region.
Regional service
In Canton Genf, clean project logic and clear ownership between roof and electrical work matter most. Geneva is the only Romande canton with a dominant full-service utility: SIG bundles electricity, gas, water, district heating, and telecom. This greatly simplifies ZEV projects and neighbourhood solutions because all grid questions are answered by a single partner.
Regional service
In Canton Genf, flat roofs on commercial buildings and multi-family homes represent the largest untapped solar area. Geneva consistently implements MuKEn principles. New buildings and major renovations must meet self-generation requirements; heating replacements clearly favour renewables. PV systems combined with heat pumps or district heating complements are the recommended standard.
Further reading
These guides answer the questions that come up most often before deciding on a solar installation.
In 2026, the SIG Prime solaire supplements the Pronovo one-time incentive: 25% of the PRU for 2 to under 30 kWc and 15% for 30 to 100 kWc. Self-consumption, commissioning and Pronovo certification are decisive.
Geneva requires sites consuming more than 0.2 GWh per year to equip suitable roof areas with PV by 2030. The decisive points are the definition of suitable areas, priority for self-consumption and proof of any exemption to OCEN.
The locations directory gives you an overview of all cantons and municipalities and takes you straight to the information for your region.
