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Swiss chalet with a photovoltaic system at sunrise

COMPLETE PV SYSTEMS · OPTIONAL STORAGE

PV in Canton St. Gallen – Eastern Swiss precision

The Canton of St. Gallen is a center for energy research and innovation – with HSR (now OST) as a driver. The ambitious St. Gallen Energy Concept 2050 massively promotes PV expansion, and the St. Gallen Energy Agency advises builders on the diverse subsidy options.

St. Gallen is a center for energy research – OST (Eastern Switzerland University of Applied Sciences) and the SPF Institute for Solar Technology in Rapperswil are among the leading solar research institutions in Switzerland.

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Built to Swiss standards (NIN/ESTI)Free & non-bindingData stays confidential

Figures with sources

Solar in St. Gallen: cost, size, storage.

Three questions decide almost every project before a roof is ever measured. Here they are with source and date, so it stays clear what each figure rests on.

  1. Costs

    What a system costs

    Example: 5–10 kWp rooftop PV: CHF 13,500–27,000. Incl. 8.1% VAT, before incentives and tax deductions, without a battery. Calculated from the SFOE median of CHF 2,497/kWp: 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 sources

  2. Sizing

    Single-family home: the realistic size

    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 St. Gallen is around 1100 kWh/m² per year. Whether that works on your roof in St. Gallen 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 installation

  3. Storage

    Battery storage and self-consumption

    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. Relevant grid operators in Canton St. Gallen: SAK, sgsw.

    When battery storage makes sense

Sources: SFOE price survey 2025 · 03 Aug 2026 · FTA: VAT rates · Swiss Federal Office of Energy, factsheet on PV promotion (PDF) · Pronovo, one-time payment for PV · Swissolar, photovoltaics factsheet (February 2024)

Services

What we offer.

PV system, heat pump, storage, wallbox and monitoring from one team. Every service is planned as part of a working energy system.

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Illustration of a home with a solar roof, heat pump and charging station.

01 · Roof & facade

Plan and install PV systems cleanly.

We review roof, structure, shading, cable routing, inverter and grid connection. Then we create a technically reliable quote.

Roof review · Electrical coordination · Commissioning

01 / 05

Process

Understand first, then promise.

From first contact to commissioning, every system follows a clear process. We clarify roof, electrical work, incentives and expansion path completely. Only then do you receive a reliable quote. No site chaos, no wishful math.

  1. 01
    About 2 minutes

    Initial estimate

    Your key details are enough for a first, honest orientation — no appointment, no obligation.

  2. 02
    Response within 24–48 h

    3D survey & technical review

    We measure the roof by drone and clarify electrical work, regulations and the grid operator.

  3. 03
    A few days after the survey

    Transparent quote

    You see every line item individually, realistic ranges and sensible options such as storage or a wallbox.

  4. 04
    After permit and grid-operator approval

    Planning, installation & commissioning

    We coordinate execution, registration, acceptance and documentation until your system is reliably connected to the grid.

Swiss facts

Applies to residential and commercial properties.

One-time remuneration
Federal support depends on system type and size band. Vigorek clarifies which remuneration rate applies to your property and how it interacts with canton and grid operator.
Storage as a system decision
A battery only pays off when it fits your consumption and home technology. We assess it as part of the overall plan — not as a late upsell.
Realistic payback
We calculate with ranges instead of wishful numbers: self-consumption, remuneration and tariff logic together give a realistic picture of your economic return.

Economics

What does your solar system save?

We map self-consumption, feed-in tariff and payback for your property — so you see early what the system realistically returns.

Proof

How sound planning becomes visible.

Our quotes are not built from flat packages, but from checked data, technical pre-assessment and clearly itemized positions.

  1. Planning basis

    Official data as the first cross-check

    Roof potential, irradiation and addresses are checked against GeoAdmin and BFE Sonnendach: the same datasets used by federal and cantonal bodies.

    Tablet showing a 3D roof plan next to printed cadastral plans and elevation maps on a light desk

  2. Property review

    Final quote based on verified data

    The initial estimate gives realistic orientation. For the final quote, we capture roof areas, access and technical conditions through a 3D survey (drone) and on-site review — precise, not based on satellite assumptions.

    Survey drone above a pitched roof during property capture at dusk

  3. Electrical

    Coordination by licensed professionals

    From electrical planning through protection equipment to grid registration: all safety-critical steps are carried out by licensed electrical professionals, in-house or through vetted partners.

    Electrical professional wiring the protection devices in a distribution cabinet next to the inverter

  4. Quote

    Itemized instead of a flat package

    Every line item is shown individually instead of hidden in a flat package — so variants and ranges stay traceable from the start.

    Printed photovoltaic quote with individually itemized positions next to glasses and a pen

Execution standard

  • Fall protection
  • Waterproofing
  • Electrical installation to standard
  • Documentation

Regional clarification

Not every system follows the same logic in St. Gallen.

In Switzerland, permits, grid operator, metering concept and incentive path always depend on the property, municipality and canton. These are exactly the points clarified early before a quote becomes binding.

That avoids a generic promise and creates a well-founded assessment that fits the region and the building.

Components by

  • Fronius
  • LONGi Solar
  • BYD
  • SolarEdge
  • Ernst Schweizer
  • SMA
  • Stäubli
  • Huawei
  • KOSTAL

The Founders

Engineering depth. Financial structure.

You know before signing who calculates your project and who builds it. Behind that are two founders with two areas of expertise — engineering and finance — and the conviction that 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.

CFATreasuryBusiness case

Marc Hammerschmidt

B.Eng. Mechanical Engineering

Co-Founder · Engineering & Planning

Marc handles the technical side: planning, structural analysis, system integration and execution that remains traceable a decade later. An engineering mindset means no improvisation, only well-reasoned solutions for every roof.

Mechanical Eng.System planningStructural analysis

Next step

Questions about your roof? We’ll go through them with you personally — the initial estimate is the easiest way in.

Building in focus

From roof surface to energy surface.

Full-black, in-roof or flat-roof: in St. Gallen we plan not for a datasheet, but for a building that has to stand up architecturally and within its local context.

Architectural rendering of a Swiss building with an integrated full-black solar roof
Transformation

Architecture first

Architecture, use and yield planned together.

In St. Gallen, materiality, visual lines and technical details are aligned so the system fits the design language and performs cleanly over time.

Full-BlackIndachFlachdach
Substance01

The roof leads, not the sales graphic.

Mounting, waterproofing, shading and electrical work are clarified on the actual building — not on a model.

Precision02

Installation becomes visible before it has to be explained.

The system grows precisely into the building: tight penetrations, protected facade, modules sliding into the rails, and an aesthetic that fits the architecture instead of disturbing it.

Calm03

Technology that stays calm after handover.

The inverter, registration and documentation are done, cable routes and labels stay traceable, and the roof becomes a calm, reliable energy source for everyday use.

Clarity before commitment

Answers before you decide.

The key points are explained clearly, factually and without artificial urgency. For details, we assess your property in its project context.

Get in touchView process

Canton check

Solar system in Canton St. Gallen: what matters regionally

For local PV projects, the municipal boundary is not the only factor: roof access, snow load, shading, meter cabinet and grid connection determine the project flow.

Canton St. Gallen has its own rules for subsidies, permits and grid connection. We check them before quoting and record them in the project documentation.

Roof potential

Canton St. Gallen guideline: approx. 1100 kWh/m² global irradiation per year.

Grid & utility

Relevant grid operators in the canton: SAK, sgsw. Metering concept and registration are clarified before execution.

Permit

Heritage guidelines revised 2024: easier solar access also in historic districts. Old town St. Gallen, Rapperswil-Jona, Lake Constance region: achievable with right approach. Normal notification procedure for standard systems.

Subsidies & taxes

No general cantonal subsidy — subsidies via Pronovo (federal) and municipal programs. Tax deductibility distributable over 3 years. SAK: min. 6 Rp./kWh guaranteed.

In the region

Solar installations in the municipalities of Canton St. Gallen

Your next step: an initial estimate in about 2 minutes.

Your key details produce a first orientation on price range, incentives and payback — a solid basis to talk through your project.

01

You know where you stand

A realistic span for your roof — not a rounded sales promise.

02

The technical side is built in

Electrical scope, metering and grid connection belong to the calculation from the start, not to a surprise afterwards.

03

You decide calmly

If it fits, a traceable quote follows. If it doesn’t, we’ll tell you that openly.

Start here

Quick to complete, concrete as a starting point for your building — and no obligation.

Free and non-binding.Response within 24–48 h.Your data stays with us.

Direct contact

If the project is already more concrete.

If you prefer to speak directly or already have documents and project context at hand, you can reach us through the usual channels.

Works well for

Roof plans, photos, existing quotes, questions around electrical coordination or already defined project timelines.

Email

info@vigorek.ch

Phone

+41 78 615 90 58

Location

Kirchweg 32, 8102 Oberengstringen, Zürich, CH

Coverage

Complete PV systems with planning, installation, electrical coordination and commissioning across all German-speaking cantons.

WhatsApp

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Core services

Services with a real focus on St. Gallen

The key services, tailored directly to St. Gallen and the local requirements in your region.

Further reading

Helpful answers on solar in St. Gallen

These guides answer the questions that come up most often before deciding on a solar installation.

PV incentives St. Gallen

Classifies Pronovo programmes, the right timing for the EIV application, required documents and additional city or municipal support for PV projects in St. Gallen.

PV permitting St. Gallen

Clarify when a notification is sufficient for rooftop or facade PV in Canton St. Gallen, when cultural monuments, townscape protection or natural monuments trigger a building permit, and which documents the municipality needs.

PV grid connection in St. Gallen

What owners in St. Gallen should clarify before installation and commissioning: grid connection, metering concept, safety verification, meter, Pronovo and handover.

Solar obligation St. Gallen

What St. Gallen’s self-generation obligation for new buildings means in practice: 10 W per m² energy reference area, 30 kW cap, exemptions, substitute levy and project workflow.

All locations by canton and municipality

The locations directory gives you an overview of all cantons and municipalities and takes you straight to the information for your region.

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