Solar calculator · free
Solar calculator Riehen: What can your roof do?
Enter your address in Riehen, check the roof faces, answer a few short questions. The calculator uses the electricity price of IWB Industrielle Werke Basel and shows size, yield, cost, subsidies and payback for your building.
- Federal roof dataArea, pitch and solar irradiation of every roof face (sonnendach.ch).
- Electricity price of your municipalityElCom tariff 2026 instead of the Swiss average.
- Checked by a project managerOn request a free site visit and a binding quote within 72 hours.
Prefer to call? 044 980 08 80
718 kWp built. From single-family homes to a 150 kWp commercial roof.
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smart-me Partner 2025
Next step
Have the figures checked on site, free of charge.
Zarko Mitrovic will call you within one working day. During the visit we check the roof, electrical system and consumption. Afterwards you receive a binding quote within 72 hours.
Zarko MitrovicSolar project manager
Prefer to talk straight away?
044 980 08 80
Solar calculator Riehen
What a solar system brings in Riehen
Worked out with the 2026 household tariff of IWB Industrielle Werke Basel: 35.9 ct./kWh incl. VAT, the same as the median in the Canton of Basel-City.
| Household | Consumption per year | System | Price after subsidy and tax deduction | Saving in year 1 | Payback |
|---|---|---|---|---|---|
| 4 persons | 4,500 kWh | 6.8 kWp | CHF 11,400–15,500 | CHF 850–880 | 13–19 years |
| 4 persons with heat pump | 9,500 kWh | 14.3 kWp | CHF 19,900–26,300 | CHF 1,960–2,000 | 10–14 years |
| 4 persons with heat pump and electric car | 12,000 kWh | 15.8 kWp | CHF 21,400–28,500 | CHF 2,480–2,530 | 9–12 years |
Assumptions: roof with room for about 16 kWp, 1,000 kWh per kWp and year, feed-in at 8 ct./kWh, one-off payment from Pronovo (CHF 360/kWp), tax deduction at a marginal rate of 25 %. Prices including installation and VAT. Heat pump +5,000 kWh, electric car +2,500 kWh a year.
Solar power in Riehen in figures
- Electricity price 202635.9 ct./kWhHousehold (H4) incl. VAT, IWB Industrielle Werke Basel
- Median in the Canton of Basel-City35.9 ct./kWhHousehold (H4) incl. VAT, 3 municipalities
- Solar potential of the roofs81.8 GWha year on the suitable roofs (SFOE)
- Used today11.2 %9.9 MWp of solar installed
Sources: ElCom, tariffs 2026; Swiss Federal Office of Energy SFOE, solar potential of Swiss municipalities; Energie Reporter (SwissEnergy, CC BY 4.0).
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Frequently asked questions
Questions about the solar calculator
Is the site visit really free?
Yes. The visit and the quote cost you nothing and commit you to nothing. You only decide once you hold the binding quote in your hands.
What does a solar system cost in Riehen?
For a single-family house of 4 persons the calculator proposes about 6.8 kWp. That costs CHF 17,700–23,200 including installation and VAT. After the one-off payment and the tax deduction, CHF 11,400–15,500 remain. For your roof, the solar calculator above works it out with your address.
Is a solar system worth it in Riehen?
With the electricity price of IWB Industrielle Werke Basel (35.9 ct./kWh incl. VAT) this system saves CHF 850–880 in the first year and has paid for itself after 13–19 years. With a heat pump and an electric car it is CHF 2,480–2,530 and 9–12 years, because you use more of the solar power yourself.
Does the Canton of Basel-City subsidise photovoltaics?
The canton does not subsidise photovoltaic systems on their own, as the federal government supports them. If you renovate the roof or facade for energy efficiency and fit modules at the same time, you can receive a contribution through the Aktion Solarkraftwerk Basel.
Can I deduct a solar system from my taxes in Basel-City?
For existing buildings in private ownership, measures for using renewable energy are deductible, but not for new builds. If in doubt, have the deduction confirmed by the tax office or your tax adviser.
How accurate is the solar calculator?
It gives guide values, not a quote. It uses the federal roof data (sonnendach.ch), the electricity price of your municipality (ElCom 2026) and the one-off payment from Pronovo. What it cannot see: roof condition, shade from trees, electrical system, access. That is why we check these during a free site visit and send you a binding quote within 72 hours.
Where does the roof data come from?
From the Swiss Federal Office of Energy (sonnendach.ch). It records area, pitch, orientation and solar irradiation of every roof face of every building in Switzerland. The aerial image is from swisstopo. We count about 70 % of the area as panel area; the rest is needed for edges, gaps and roof windows.
Which subsidies are included?
The federal one-off payment (Pronovo): CHF 360 per kWp for systems below 30 kWp, proportionally less above. Plus the tax deduction for existing private buildings, calculated with a marginal tax rate of 25 %. Cantonal and municipal grants are not included; we check them during the site visit.
Is a battery worth it?
A battery raises self-consumption but costs more. Whether it pays depends on the feed-in tariff and your consumption. That is why the calculator shows both options side by side.
Why do you need my contact details?
We send you the results by e-mail, and a project manager looks at the figures. We do not pass on your details. We are not a referral portal; we plan and build the systems ourselves.
Which regions do you cover?
All of German-speaking Switzerland. We build most often in the cantons of Zurich, St. Gallen, Schwyz and Aargau. Our locations are in Zumikon ZH and Lachen SZ.