Houzy Solar Calculator
with self-consumption

Houzy Solar CalculatorCalculate the production, costs and feasibililty of a solar power system

Planning to install solar panels on your roof? What about roof suitability and the price of solar installations? Or maybe you're just curious and want to learn more about energy self-sufficiency. The Solar Calculator is here to help! Customized results.

free & non-binding

neutral estimate

quick online result

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Solar Calculator – Roof compatibility with solar panels

Basierend auf Ihrem Standort kann unser Solarrechner bereits einschätzen, ob sich eine oder mehrere Dachflächen Ihrer Immobilie für eine Solaranlage eignen. Compatibility with a photovoltaic system is primarily determined by solar radiation, roof orientation, inclination, shading, and roof size.

Solar radiation
Roof orientation
Roof pitch
Roof size
Solar Calculator - suitability of the roof

Houzy Solar Calculator – How it works


Describe house and energy needs

Enter the relevant key data about your property and energy consumption in just a few steps.


Analyze solar potential and costs

The annual solar potential of your selected roof and the associated cost are calculated based on your selection.


Get your online results

After the analysis, you will receive online access to your free solar evaluation by mail.

Economic efficiency of a photovoltaic system

Calculate the profitability of a photovoltaic system with our Solar Calculator – Are solar panels worth it?

Solar systems combined with high self-consumption often pay for themselves after 15 to 20 years. Our Solar Calculator analyzes the profitability of a PV system for you. If the roof is suitable for a photovoltaic system, the question often arises: Is the investment worth it? From a purely ecological point of view, this question can always be answered with a yes. From an economic point of view, the costs (acquisition costs, operating costs), the subsidy contributions, the local electricity prices, the local feed-in tariffs, self-consumption etc., are decisive. Our Solar Calculator calculates the amortization period and shows you neutrally whether the investment is worthwhile.

Advantages of your own photovoltaic system – Sustainable, cost-effective, self-sufficient

Green, sustainable energy

They produce climate-friendly electricity and contribute to a better environment.

Lower electricity costs

Solar power from your own roof is cheaper than power from the public grid. You can permanently reduce your electricity costs by 30%.

Become a power entrepreneur

They generate income by feeding solar power into the grid. In most cases, the initial investment for a solar system pays for itself over its entire lifetime.

Advantages of a photovoltaic system in Switzerland

Subsidies & deductible costs

The federal government supports the purchase of solar systems with approximately 20 % subsidies. The investment costs can also be deducted from taxes in most cantons.

Autonomous power production

With your own solar system, you become self-sufficient and are less affected when electricity price increases.

Increased property value

The value of your home is significantly increased by a solar installation on the roof.

This is what we stand for


We are an independent, young Swiss company and are financed by partners and investors. We develop all our tools ourselves - the results are based on Open Data.


Data security

Data security is our top priority. Your data will never be passed on to third parties without your permission. You always decide for yourself when you want to share what information with whom.

Certified experts

We exclusively work with selected and certified regional Swiss real estate experts and craftsmen in order to meet your quality requirements.

What our users say about Houzy

Solar Calculator

How big is the solar potential of your house?

Calculate now for free your solar potential.

More smart tools and services

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FAQs – Answers on Houzy

What happens to the data entered?

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Data protection and security are our top priority. That's why we leave nothing to chance. To ensure the protection of your personal data and secure data transmission, we work with the latest security technologies. Your data is stored in encrypted form in a computer centre that is certified with all current industry standards. Data is therefore only passed on to third parties if you request service offers via Houzy that require this. An example of this is when you actively contact one of our broker partners. You can find further information in our T&Cs under "Our privacy policy".

How much does a solar system cost in Switzerland?

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An average single-family home consumes 4,000 to 5,000 kilowatt hours of electricity per year. A photovoltaic system would have to generate 8 to 10 kilowatt peak for this electricity consumption. Such systems cost around CHF 20,000 for modules, controls, inverters and installation. In return, you receive a one-off subsidy of 4,000 to 5,000 francs and save taxes thanks to the investment. These are only approximate values. You can use the Houzy solar calculator to calculate the solar potential, costs and subsidies.

Is a solar system worthwhile?

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From an ecological point of view, the answer to this question is always "yes". From an economic point of view, the answer depends on the acquisition and operating costs, subsidies, local electricity prices, the local feed-in tariff and self-consumption. Photovoltaic systems combined with a high level of self-consumption often pay for themselves after 15 to 20 years. The solar calculator from Houzy calculates the amortization period and shows you neutrally whether the investment is worthwhile.

Is my roof suitable for a solar system?

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Solar radiation, roof orientation, roof pitch, shading and roof size determine how suitable your roof is for a photovoltaic system. With the solar calculator from Houzy, you can find out in two minutes whether a solar system is worthwhile. You can also calculate all the costs, subsidies and tax savings and find out how quickly the investment will pay for itself.

What are the advantages of the Houzy Solar Calculator?

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The digital solar calculator from Houzy analyses the solar potential as well as the costs of a photovoltaic system with just a few entries - completely free of charge and without obligation. The analysis is based on all relevant criteria of a solar analysis and shows you the investment costs, operating costs, subsidies, tax savings, feed-in tariffs, etc. in detail. In just 2 minutes and after a few clicks, the solar calculator is ready and you can see all the relevant information about the photovoltaic system in an overview. The results are completely neutral - Houzy is an independent platform and does not pursue any third-party interests. 

What information does Houzy need for the Solar Calculator?

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To find out whether your house is suitable for a photovoltaic system, we need the address. This allows us to obtain relevant information from publicly accessible databases and directories, such as the geographical location, roof area or roof orientation. Some key data about the house and your energy requirements help us to fine-tune the calculations. Afterwards, you will immediately receive online access to your digital solar analysis on Houzy by email.

Why is the Solar Calculator free of charge?

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Houzy is a start-up and finances itself by brokering third-party services and through advertising partnerships with national and regional partners. However, you as a user always decide for yourself when you want to share which data with whom, and thus always retain data sovereignty. The use of our solar calculator and the entire homeowner platform is permanently free of charge for you. However, if required, you can request free quotes for the installation of a photovoltaic system from one of our recommended tradesmen in your region.

What is Houzy?

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Houzy is a young Swiss PropTech company with one goal: Making homeownership simple. The platform integrates user-friendly online tools such as the property valuation, the renovation calculator or the property gains tax calculator, which help to optimally manage private property and save effort and costs in the process. The scope of Houzy is constantly being expanded. You can find out more under About us.

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