How your solar system produces energy and reduces costs.
Transparent costs and pricing structure at a glance.
When your solar system starts paying off financially.
A solar roof for your car – charge with your own solar energy.
Determine your personal solar potential in just a few minutes.
Maintenance, monitoring and support – all from one source.
Store your solar power and use it around the clock.
Upgrade your existing system to the latest technology.
Guide
A photovoltaic system on your own roof produces electricity for 25 to 30 years. Here you will find what counts before you decide: how large the system should be, what it costs, what subsidies there are and how you can pay for it.
Almost any roof without heavy shading is suitable. A south-facing surface produces the most, but east-west roofs spread the power more evenly across the day and so often match your own consumption better. Each kilowatt peak of output needs around 5 m² of roof area.
In Switzerland, a system with 8 kWp typically produces 7'000 to 9'000 kWh a year. Our solar calculator shows what your roof can deliver, using data from Sonnendach, the federal solar cadastre.
In the past, a system was sized for current consumption. That is outdated, because a heat pump and an electric car increase electricity demand, and the fixed costs for scaffolding, planning and connection arise at any size. In most cases, it pays to make good use of the roof.
We size the system based on your consumption, the loads you plan to add and your grid operator's feed-in tariff.
The price per kilowatt peak falls as the system gets larger. The roof, scaffolding, electrical installation and choice of inverter affect it, as does the question of whether a battery is added. You will find current prices per kWp and worked examples for 6, 10 and 15 kWp on our cost page.
When the system has paid for itself depends above all on the share of the electricity you use yourself. Every kilowatt hour you use yourself replaces electricity at the grid tariff, while every kilowatt hour you feed in earns only the feed-in payment.
The federal government supports solar systems with a one-off subsidy (Einmalvergütung), which is paid out through Pronovo. Depending on the location, there are also contributions from the canton and the municipality. For existing buildings, the investment can be deducted from taxes as property maintenance in almost all cantons.
You receive a feed-in payment from the grid operator for the electricity you feed into the grid. Since 2026, a minimum feed-in payment of 6 Rappen per kilowatt hour has applied to systems of up to 30 kW. Because grid electricity costs several times as much, self-consumption is the most important lever for profitability.
At Free State you choose between three models. With SolarDirect you buy the system and own it from the start. With SolarAbo you pay in fixed monthly instalments, and monitoring, warranty and insurance are included. With SolarFree you get your solar system without any investment of your own and can buy it later.
In Switzerland, sufficiently adapted solar systems on roofs in building and agricultural zones do not need a building permit. A notification to the municipality is enough. Exceptions apply to cultural and natural monuments and in some core zones.
We handle the notification, the connection application to the grid operator and the subsidy application. After installation, an independent inspection body approves the system, and then it is connected to the grid.
A solar system becomes more economical the more electricity stays in the house. A battery shifts midday power to the evening, a heat pump turns it into heat, and a charging station puts it into your electric car. If you think these steps through from the start, you save yourself later changes to the electrical installation.
Short answers to the questions asked most often before buying.
In most cases, yes. What matters is how much of the electricity produced you use yourself, because grid electricity costs several times the feed-in payment. With a heat pump, an electric car or a battery, self-consumption rises and so does profitability.
In Switzerland, a system with 8 kWp typically produces 7'000 to 9'000 kWh a year. The yield depends on orientation, tilt, shading and location.
As a rule, no. For sufficiently adapted systems on roofs in building and agricultural zones, a notification to the municipality is enough. For protected buildings and in some core zones, a building application is needed.
The federal government pays a one-off subsidy (Einmalvergütung) through Pronovo. Depending on the location, there are also contributions from the canton and the municipality, plus the tax deduction. We check what applies at your address and prepare the applications.
It flows into the grid, and your grid operator pays you for it. Since 2026, a minimum feed-in payment of 6 Rappen per kilowatt hour has applied to systems of up to 30 kW.
Yes. With SolarFree you get the system without any investment of your own, and with SolarAbo you pay for it in fixed monthly instalments. Both models allow you to buy it later.
Solar panels produce electricity for 25 to 30 years, and their output decreases slowly over that time. The inverter is usually replaced once during this period.
Was Solaranlagen in der Schweiz 2026 pro kWp kosten, von 4 bis 20 kWp, mit Speicher separat gerechnet, Einmalvergütung, Steuerabzug bis Ende 2028 und einer offenen Amortisationsrechnung für ein Einfamilienhaus.
Eine 10-kWp-Anlage kostet im Median CHF 23'304 inklusive MwSt., einzelne Offerten liegen weit darüber oder darunter. Die 11 Punkte, mit denen Sie Solar-Offerten sauber vergleichen.
Otovo ab CHF 167/Monat, Helion Contracting für 12 bis 18 Rp./kWh, Younergy mit 20-Jahres-Abo. Klingt verlockend für Eigentümer ohne CHF 25'000 flüssig. Aber die ehrliche 20-Jahres-Rechnung zeigt ein klares Bild.
