Free tool
Solar Calculator Switzerland 2026
Enter your roof area and electricity consumption — instantly receive a realistic estimate of costs, annual yield and payback period for your solar installation in Switzerland.
950 to 1'000 kWh/kWp/year
Swiss Plateau
9 to 13 years
Payback on the Plateau
Individual
Federal OTP amount (Pronovo)
25 to 30 years
Module lifespan
Your personal solar potential
Enter your available roof area (approximately) and your annual electricity consumption. The calculator is based on Swiss average values and shows gross costs before any subsidy.
Solar Calculator
Calculate the potential of your solar installation in seconds
Indicative values, updated September 2026. Sources: Pronovo, ElCom, Swissolar. Prices from independent installers, turnkey including installation and VAT, without battery storage. Local electricity utilities generally charge more.
Reference values
Typical installation sizes in Switzerland
Different system sizes are recommended depending on household size and available roof space. Prices are shown before subsidies.
Small
6 kWp
Roof area
39 m²
Medium
10 kWp
Roof area
65 m²
Large
15 kWp
Roof area
97.5 m²
Indicative 2026 values. Actual costs may vary by installer, canton and system.Detailed cost overview →
Influencing factors
What influences your solar yield?
The calculator works with average values. In practice, six factors play a decisive role — understand these to correctly interpret the result.
Roof orientation
South, east or west are idealOrientation, pitch and shading all affect yield. A professional calculation accounts for the exact roof.
Roof condition
Plan renovation if necessaryTile, concrete and metal roofs are straightforward. Asbestos or bitumen roofs must be renovated beforehand — increasing the overall cost.
Shading
Have shading checkedTrees, chimneys or neighbouring buildings can reduce yield. Modern micro-inverters or optimisers can limit losses.
Self-consumption
Storage increases self-consumptionWithout storage, self-consumption is 25 to 35 %. With storage, it rises to 60 to 80 %.
Electricity price
27.7 ct/kWh Swiss medianThe Swiss median is 27.7 ct/kWh. Every self-produced kilowatt-hour is a direct saving.
Grid feed-in
4 to 15 ct/kWhFeed-in remuneration is 4 to 15 ct/kWh, depending on the operator.
Swiss reference values
The numbers behind the calculator
Our solar calculator is based on validated Swiss market data. These reference values help you interpret the result and understand the underlying assumptions.
Request concrete quotes nowIt's simple
From calculation to quote
The calculator is the first step. In three further simple steps, you receive firm quotes from vetted Swiss installers.
Enter roof area
Estimate your usable roof area in m² (length × width).
Enter electricity consumption
Your annual consumption is shown on your electricity bill.
Understand your potential
Immediately see: system size, annual yield, costs and estimated payback period.
Compare quotes
Request 3 free quotes from vetted installers — no commitment and quick.
Profitability
What does a solar installation concretely bring you?
Values depend on system size, electricity tariff and self-consumption.
Annual solar value
943 to 1'945 CHF/year
Self-consumption and feed-in value for 10 kWp on the Plateau
Feed-in tariff
4 to 15 ct/kWh
Depends on the grid operator
Indicative payback
9 to 13 years
Benchmark for the Plateau
Module lifespan
25 to 30 years
Indicative values, updated September 2026. Sources: Pronovo, ElCom, Swissolar.
Note: Indicative values, updated September 2026. Sources: Pronovo, ElCom, Swissolar. Actual results depend on the project and local tariff.
Ready for concrete quotes?
Our calculator gives a first indication. For binding offers, we connect you free of charge with vetted Swiss solar installers.
Request free quotesWhy use this solar calculator?
Instant calculation
Get a first estimate for your solar installation in seconds — no registration required.
Calculate yield
See how much electricity your roof can produce annually — based on your canton.
Understand costs
Realistic cost estimate with OTP subsidy based on current Swiss market prices.
Plan payback
Find out when your investment pays off.
Frequently asked questions
Questions about the calculator and profitability
How accurate is the solar calculator?+
Our solar calculator provides a first estimate. It uses 6.5 m² per kWp, 950 to 1'000 kWh per kWp and 1'800 to 3'000 CHF per kWp.
How much roof space do I need per kWp?+
Allow approximately 6.5 m² per kWp. A 10 kWp installation needs about 65 m² of usable roof space.
What is the one-time payment (OTP) subsidy?+
The federal one-time payment is calculated individually by Pronovo based on the installation and applicable conditions. Check pronovo.ch for current eligibility and amounts.
What is the typical payback period in Switzerland?+
On the Swiss Plateau, the indicative payback period is 9 to 13 years.
Is a solar installation worthwhile with a north-facing roof?+
A purely north-facing roof is not ideal. East and west-facing roofs can still be worthwhile. A professional calculation should account for orientation and shading.
Should I add a battery storage system?+
Without storage, self-consumption is 25 to 35 %; with storage it is 60 to 80 %. A 10 kWh battery costs 5'500 to 7'500 CHF.
How does an electric vehicle affect my solar calculation?+
Charging an electric vehicle during the day can increase direct use of solar electricity. Include the vehicle in the professional system sizing.