How long does a solar panel installation take?
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For a single-family home, the installation typically takes 2 to 4 days. The roof remains functional throughout the work and the home's electrical supply is only cut for a few hours during the final grid connection.
What is the lifespan of solar panels?
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The panels we install (Jinko, AIKO, LONGi, Arres Solar) are guaranteed for 25 years at 80 % of their initial output. Their effective lifespan generally exceeds 30 years with annual degradation below 0.5 %.
What is the return on investment for a solar installation in Western Switzerland?
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The payback period averages 7 to 10 years for a well-sized residential installation, taking into account cantonal grants and the federal one-time payment. Beyond that, production remains essentially free until end of panel life.
What grants can I receive?
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You can combine the federal one-time payment (approximately 350 to 450 CHF/kWp depending on size), variable cantonal grants (Vaud, Geneva, Fribourg, Neuchâtel) and tax deductions on the investment. I.ON handles all administrative steps.
Do I need a battery storage system?
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A battery increases your self-consumption from 30 % to 80 % depending on sizing. The return on investment for a battery is longer (12 to 15 years) but it provides partial independence in the event of a grid outage. We assess each case individually.
What happens in the event of a fault?
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Any drop in production is detected by our 24/7 monitoring and addressed by our in-house team within 48 hours. Fronius, SMA and SolarEdge inverters benefit from manufacturer warranties of 10 to 25 years.