Frequently asked questions about the 2027 feed-in rules
Short answers with sources. Where a figure comes from this site's own calculation, it says so.
Last reviewed: 15 October 2026
What changes on 1 January 2027?
Until the end of 2026, the payment for solar power sent to the grid follows a quarterly average price, unless the grid company and the producer agreed otherwise. From 1 January 2027 it follows the market price of the hour, later the quarter-hour, in which you send the power. Small systems keep a minimum payment through a premium. Parliament changed the Energy Act in 2025 to do this.
Sources: UVEK: Erläuterungen zur Änderung vom November 2026 der EnFV · Swissolar: Neues Vergütungsmodell schafft Marktanreize (27.05.2026)
Will I lose money?
Usually a little. For a typical house with 8 kWp, the 2027 rules replayed on the years 2021 to 2025 would have paid about 15 to 50 francs less per year. That is 1 to 4 percent of everything the panels earn, including the power you use yourself. These figures come from this site's own calculation. Your result depends on your roof, your use and your grid company.
Sources: Method
What are the minimum payment and the premium?
Systems under 30 kW get at least 6 Rappen per kilowatt-hour on average. Each quarter, the Federal Office of Energy calculates the reference market price. If it is below 6 Rappen, the grid company pays the difference as a premium on every kilowatt-hour sent to the grid in that quarter. If it is higher, there is no premium.
Sources: UVEK: Erläuterungen zur Änderung vom November 2026 der EnFV · BFE: Referenz-Marktpreise
What is the reference market price?
The average market price solar power earned in a quarter, weighted by when solar systems actually send power. The Federal Office of Energy publishes it after each quarter.
Sources: BFE: Referenz-Marktpreise · BFE: Berechnung der Referenz-Marktpreise gemäss Art. 15 EnFV
What happens at negative prices, should I switch off?
That depends on your grid company. Several, for example EKZ, Romande Energie and Primeo, charge the negative price but still pay the premium. Then it pays to keep sending power as long as the premium is bigger than the negative price, and to switch off only below that. Others simply pay nothing at negative prices; then switching off does not change your payment. Many have not published their rule yet.
Sources: EKZ: Rückliefertarife 2027 · Romande Energie: Prix de reprise · Primeo Energie: Rückliefertarife
When does this apply to me?
In principle from 1 January 2027, with a transition period of one year. Many grid companies switch only systems with a smart meter in 2027. Some keep their current model for 2027, for example Groupe E, or switch existing systems only in 2028, like BKW. Some pay a fixed price, such as SIG and the Services Industriels de Lausanne. The result on this site shows what your grid company has published.
Sources: Swissolar: Neues Vergütungsmodell schafft Marktanreize (27.05.2026) · BKW: Dynamische Abnahmevergütung · Groupe E: Offre de reprise · SIG: Rétribution de l'énergie électrique
Can my grid company pay more?
Yes. The market-price rule applies when the grid company and the producer do not agree on a payment. Grid companies may pay more, and some do, with a fixed price or extra payments for guarantees of origin.
Sources: Swissolar: Neues Vergütungsmodell schafft Marktanreize (27.05.2026) · UVEK: Erläuterungen zur Änderung vom November 2026 der EnFV
Does a battery pay off because of the new rules?
Rarely. A 10 kWh battery costs about 7,000 francs today, installed (2025 price study of SwissEnergy). At a typical electricity price of 27 Rp/kWh it saves about 300 to 400 francs a year, so it needs more than 15 years to pay for itself — longer than it lasts. It is most likely to pay with a heat pump and an electric car, with high electricity prices, or if battery prices keep falling. The calculator tells you, for your house, the battery price at which it becomes worth it, and the electricity price at which it pays at today's battery price. Moving consumption into the midday hours usually brings more and costs little.
Sources: Method
Where do the numbers on this site come from?
Measured weather from MeteoSwiss, from the station nearest your postcode. Swiss day-ahead market prices from energy-charts (Fraunhofer ISE). Euro exchange rates from the European Central Bank. Household electricity prices from ElCom. The 2027 rules of the grid companies, researched from their own documents. Everything is calculated in your browser.
Sources: MeteoSwiss Open Data · energy-charts.info (Fraunhofer ISE) · European Central Bank: euro reference exchange rates · ElCom: Tarifdaten