Amortization of a solar installation


Is a solar installation worthwile? 


In addition to the environmental benefits associated with a solar installation, there are also an array of economic reasons to purchase one. 40 % of Helion solar panel owners named economic efficiency as the main reason for their purchase decision.

Economic arguments in favour of a solar installation

You will be less affected by electricity price increases
You will benefit from government subsidies

You can reduce your electricity bill  

You can enjoy tax savings

You will increase the value of your property

You can sell the surplus electricity


About the costs

How long does it take for a solar installation to pay for itself?

The time it takes for a solar installation to pay for itself depends on a variety of factors. Solar installations generally pay for themselves after 9 to 15 years.


With a lifespan of 30 years, your system can even earn you money. If energy prices rise, which will inevitably happen in the future, the system will pay for itself much faster. You will also be less affected by future price increases.

You can find the amortisation calculation for your solar installation here. You can use this to calculate the approximate payback period of your solar panels.


To calculate the payback period of your photovoltaic system in years, the purchase and installation costs are divided by the sum of income and depreciation.

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Example of amortisation calculation

3-person household, approx. 4 kWp = approx. 25 m2 


  • Costs approx. CHF 17,000
  • less one-off payment CHF 2,760
  • less CHF 3,500 in tax savings at 25 % progression
  • less local subsidies, which vary depending on municipality


→ Investment: CHF 10,740.-
Annual electricity output: approx. 4000 kWh



Mit 45 % Eigenverbrauch

(Tagsüber wird der selbstproduzierte Strom selbst verbraucht)


  • 55 % des Ertrags wird zu 10 Rp pro kWh ins Netz eingespiesen = 220.- p.a.
  • 45 % wird selbst verbraucht → Reduktion der Stromrechnung
    um 470.- (Annahme Energiebezugspreis ist CHF 0.26 pro kWh)


→ Payback 14 Jahre

Achieving returns with photovoltaics

Die Preise für Solaranlagen sind in den letzten Jahren signifikant gesunken. Aktuell sind die Bedingungen für eine hohe Rentabilität der Solaranlage äusserst vorteilhaft.


Self-produced solar power is significantly cheaper than electricity from the grid:


  • Electricity from the power station costs 23 centimes
  • Solar power including operating expenses costs 12 centimes



Je mehr Sie Ihren selbstproduzierten Strom nutzen, desto rentabler wird Ihre Solaranlage - und desto günstiger fällt Ihre Stromrechnung aus.

Consuming and selling solar power yourself

If you do not have an energy storage system, the solar energy can only be self-consumed at the time the electricity is generated. As a result, a considerable amount of the generated energy is not available for self-consumption. This means that instead of using the cheap electricity from your own solar installation, you are forced to purchase expensive electricity from the grid.


How to maximise your own consumption

To avoid this, all you need is a storage solution and a corresponding control system. With the help of an energy storage system, you can increase self-consumption by up to 80 %. Our intelligent smart energy control system increases self-consumption by selectively controlling and switching your appliances off and on. This reduces the need to buy in external electricity.


All information about electricity storage

In many cases, the self-generated electricity cannot be fully used for the home, despite storage solutions and control systems. In this case, the electricity that is not consumed is fed into the grid and sold to the local power station in return for remuneration. This is generally between 4.3 and 15 centimes, depending on the municipality. To find out how much remuneration you can currently receive for solar electricity where you live, please contact the Verband unabhängiger Energieerzeuger (Association of Independent Power Producers) or consult the website of your electricity supplier.


Feeding surplus solar power into the grid


Investing in a photovoltaic system is a worthwhile investment strategy. Let your roof work for you.

More topics about the solar plant

Funding for solar installations

How are solar installations funded?


How much does a photovoltaic system cost?

Maintenance, monitoring and servicing

Service at the highest level

Financing a solar installation

Rent or buy a solar installation?

Profitability of the ZEV

Why is ZEV worthwhile?

Union for self-consumption (ZEV)

How does a ZEV work?

Feeding solar power into the grid

Why feed solar power into the grid?


How can you increase your level of self-consumption?

Solar calculator

How does the solar calculator work?

Photovoltaic system

What is a photovoltaic system?


What components does a photovoltaic system need?


When is a photovoltaic system worthwhile?