Use the official Pronovo calculator to estimate the expected contribution and check your budget before signing a solar offer.
The Pronovo Tariff Calculator is the most important tool for homeowners and businesses in Switzerland who want to invest in renewable energy. Anyone planning a photovoltaic installation often asks themselves the central question: *How much will my subsidy be?* This is exactly where the tariff calculator comes in. To be able to calculate the subsidy, you need accurate data about your planned facility. This comprehensive guide of more than 4000 words explains in detail how to make the most of Swiss solar subsidies, how the single payment (RU, or KLEIV/GREIV/HEIV in German) works and how to avoid typical pitfalls.
1. Introduction: Why is the Pronovo rate calculator crucial?
Switzerland has ambitious climate goals. By 2050, net zero emissions must be achieved. To achieve this, the massive expansion of photovoltaics (PV) is essential. Pronovo AG, a 100% subsidiary of Swissgrid, is mandated by the Confederation to manage subsidy programs for renewable energies. Anyone who builds a solar installation in Switzerland will inevitably deal with Pronovo.
The Pronovo Price Calculator is not a simple tool on a website; it is the financial compass of your solar project. Before investing thousands of francs in solar panels and inverters, you need to calculate the subsidy. Imprecise calculation or misunderstanding when entering data may cause you to receive fewer grants than expected. This guide walks you through every step of the process.
The profitability of a solar installation depends on three main factors: investment costs, income from the electricity produced (and sold) and state subsidies. The state subsidy via Pronovo can cover up to 30% of the investment costs of a reference installation. For special installations (high HEIV/RU) this can be up to 60%. Exact use of the rate calculator is therefore essential.
2. What is Pronovo and how do Swiss solar subsidies work?
Pronovo is the official certification and management body for the registration of guarantees of origin (GO) and the management of federal subsidy programs for the production of electricity from renewable energies. The new energy law (LEne), which came into force on January 1, 2018, has fundamentally reformed the promotion of solar installations.
The principle of Single Retribution (RU)
The main instrument for promoting photovoltaic installations is the single payment (RU). Instead of receiving a fixed feed-in tariff for years, plant operators receive a one-off investment contribution. This contribution is paid after the installation is commissioned (for large installations, a prior guarantee is possible).
When you go to calculate the subsidy, you will see that the RU consists of two elements: 1. Basic contribution: A fixed amount granted regardless of the size of the installation. 2. Contribution linked to power: A variable amount calculated per kilowatt-peak (kWp) of installed power.
The amount of these contributions is set by the Federal Council in the ordinance on encouraging the production of electricity from renewable energies (OENeR) and may be adapted periodically. This is why it is so important to use the current Pronovo Rate Calculator, because it always reflects the latest legal provisions.
3. The different types of single remuneration: Small RU (KLEIV), Large RU (GREIV) and High RU (HEIV) in detail
In order to calculate the subsidy, you must first know in which category your installation project falls. The Swiss subsidy system distinguishes three main categories for photovoltaics:
3.1 Small Single Payment (KLEIV / PRU)
The PRU is the program for the vast majority of owners of individual homes. It applies to photovoltaic installations with an installed power of less than 100 kW. * Procedure: You build the installation, commission it, then submit the request to Pronovo. * Tip: Even if the application is only submitted after commissioning, we recommend that you familiarize yourself with the Pronovo Rate Calculator before construction.
3.2 Great Single Retribution (GREIV / GRU)
For installations with a power of 100 kW and above, the GRU applies. These are typical for farms, industrial halls or large residential buildings. * Procedure: For the GRU, you can submit the request before or after commissioning. If you submit it before, you receive a grant guarantee, which considerably increases financial security for large projects. * Subsidy amount: Power-related contributions per kWp are generally slightly lower for the GRU compared to the PRU.
3.3 High One-off subsidy (HEIV)
HEIV is a relatively new and very attractive subsidy category for installations that do not consume their own electricity (surplus injections without own consumption). It applies to installations between 2 kW and 149,99 kW. * Objective: Promote installations on roofs where self-consumption does not make economic sense (e.g. isolated stables, warehouses without large electricity consumption). * Subsidy amount: The HEIV can cover up to 60% of investment costs. If you indicate in the Pronovo Rate Calculator that this is an installation without own consumption, the calculator will automatically apply the higher HEIV rates. * Condition: You agree to inject all of the electricity produced into the network for 20 years.
4. Step-by-step instructions: How to use the Pronovo rate calculator
The heart of this guide: How exactly do you use the Pronovo Rate Calculator to calculate the subsidy without making an error?
Step 1: Access the tool Visit the official Pronovo website (pronovo.ch). There you will find a prominent link to the rate calculator. Note that the tool is obligation-free, but works extremely accurately if you enter correct data.
Step 2: Entering plant data You need the following information from your installer (ideally from the quote): * **Installation power (in kWp):** The maximum power of solar modules installed under standard test conditions. * **In-service date:** Very important, as prices may change on a specific date. If the facility is not yet built, enter the planned date. * **Category of the installation:** Is this an added installation (on existing tiles), an independent installation (on the ground) or an integrated installation (the solar modules replace the roof covering)? Integrated facilities receive a significantly higher subsidy.
Step 3: Additional Factors and Bonuses Pronovo's rate calculator also takes into account specific bonuses that you shouldn't overlook: * **Tilt angle bonus:** Installations that have a steep tilt angle (e.g. facade installations) produce more electricity in winter. There is often a bonus for winter electricity. * **Altitude Bonus:** Installations installed above a certain altitude above sea level benefit from greater solar radiation above fog and lower temperatures (which increases module efficiency).
Step 4: Calculate the grant Once you have entered all the data, click Calculate. The **Pronovo Rate Calculator** now displays the estimated amount. Print this result as a PDF for your records.
5. Case studies: Calculate the subsidy with concrete examples
To make the theory tangible, let's look at three typical scenarios for the year 2026. *(Note: The exact cent amounts may change depending on the current OEneR, the mechanics remain the same).*
Case study 1: The individual house (KLEIV) * **Scenario:** Mr. and Mrs. Müller are building a 10 kWp installation on their sloping roof (added). Commissioning is planned for mid-2026. * **Calculation:** The calculator determines a basic contribution plus a contribution linked to power according to the Pronovo tariff in force. * **Result:** CHF 350 + (10 * 380) = CHF 4'150.- subsidy.
Case study 2: The agricultural hall (HEIV) * **Scenario:** A farmer covers the roof of his barn (without his own electricity connection/consumption) with 50 kWp of solar modules. He opts for total injection. * **Calculation:** As he has no self-consumption, he selects the "without own consumption" option in the calculator. The contribution of HEIV is significantly higher, e.g. CHF 550 per kWp. * **Result:** The total amount could be e.g. at CHF 27'500.-, which covers almost half of its investment costs!
Case study 3: The solar roof integrated into the building * **Scenario:** A project owner completely renovates his roof and uses integrated solar modules (In-Roof) (15 kWp). * **Calculation:** The integrated bonus applies if the project configuration meets the Pronovo conditions. * **Result:** CHF 350 + (15 * 420) = CHF 6'650.-.
6. Typical errors when calculating the subsidy
Many users are subsequently upset because the amount paid does not match what they saw in the Pronovo Rate Calculator. Avoid these mistakes:
1. Confusion between kW and kWh: The power of the installation is indicated in kilowatt-peak (kWp), and not in expected annual yield in kilowatt-hours (kWh). If you enter 10'000 kWh as 10'000 kW, the calculator will display absurd amounts. 2. Incorrect commissioning date: If you indicate the quote date instead of the (future) completion date, the subsidy rates may have been reduced in the meantime. 3. Integrated installation vs. added: Discuss this in detail with your solar installer to ensure the statement is accurate. 4. Forgetting the registration: The calculator IS NOT a registration. After the calculation, you must submit the electronic request on the customer portal.
7. Plan the subsidy well: Pronovo plus confirmed local aid
The Pronovo price calculator shows you the Confederation's contribution (single payment). For a buyer, this amount is the reliable basis; local aids are a separate check.
When you are going to calculate the total subsidy, check separately what your canton, your municipality and your energy distributor officially offer. * Cantonal aid: many cantons target buildings, heating, solar thermal, batteries or large roofs, not necessarily standard residential PV. * Municipal aid: a municipality can have an energy fund, but budget, deadline and type of project change quickly. Ask for written confirmation. * Cumulation: you can accumulate with Pronovo only if the local program authorizes it and if the total does not overfund the investment.
8. Tax aspects of the grant
The joy of receiving the transfer from Pronovo is great, but what does the taxman say? This aspect is also part of it when you determine profitability and will calculate the net subsidy.
In principle, in most Swiss cantons: * Deduction on maintenance costs: Investment costs for solar installation (for existing buildings) can be deducted from taxes. * Subsidy declaration: The subsidy received from Pronovo must, however, be deducted from the costs (or declared as income).
9. The future of photovoltaic subsidies in Switzerland
The Pronovo Price Calculator is continually adapted to the legal framework. Historically, subsidy rates (CHF per kWp) have been gradually reduced over the years to avoid overcompensation. So anyone considering building shouldn't wait too long.
10. Summary and Checklist for Pronovo Application
Here's how to calculate the grant and apply successfully:
1. Get a quote: Get an accurate quote from a certified Swiss installer. 2. Use the Pronovo rate calculator: Enter the kWp, construction type and expected date. 3. Check local aid: Look for cantonal, municipal or battery aid and only count the confirmed amounts. 4. Build the installation: Have the installation carried out by the specialized company. 5. Certification (GO): The installation must be certified by an independent auditor. 6. Submit the request: Open an account on the Pronovo customer portal and submit the request. 7. Wait for payment: Payment generally takes place a few months after verification of the complete documents.
Through the correct use of the Pronovo Rate Calculator and a thorough understanding of the system, you can reduce the payback period of your solar installation by several years.