St. Gallen encompasses the Rheintal, Toggenburg, Sarganserland, and the city of St. Gallen. Agricultural businesses in the Rheintal and commercial enterprises in the Toggenburg often have large roof areas with good potential. This page outlines which subsidies apply to photovoltaics in the canton of St. Gallen in 2026 – from federal level through canton and municipalities to tax deduction – and what you should consider when planning.
Key points at a glance
For the subsidy in this canton, three levels are particularly important: federal subsidy, local additional programs, and tax treatment:
- Pronovo is the national subsidy basis – also in the canton of St. Gallen.
- Cantonal and municipal programs differ significantly and are regularly adjusted; they should be checked on a location-specific basis.
- The tax deduction is an important lever for existing buildings; cantonal practice may differ in details.
- Feed-in tariffs paid by the grid operator are not uniform across cantons and depend on the local grid operator.
- A good quote takes into account subsidies, self-consumption, storage, and the specific building situation.
This makes the direction clear: The specific subsidy always depends on address, system size, building type and grid operator.
- As of 11.07.2026
Federal subsidy 2026 at a glance
New photovoltaic systems are subsidised nationwide through the one-off payment from Pronovo:
- KLEIV – One-off payment for systems with less than 100 kW output (typical for single-family homes).
- GREIV – One-off payment for systems of 100 kW or more.
- HEIV – High one-off payment for systems without self-consumption from 2 kW to 149.99 kW.
- PV auctions / sliding market premium – check separately for larger systems without self-consumption.
- Winter electricity bonus (new from 1.1.2026): Supplements the one-off payment for systems of 100 kW or more with a winter yield of more than 500 kWh per kW of installed capacity. Replaces the previous altitude bonus.
Details on the programmes: Pronovo subsidy and Photovoltaic subsidies in Switzerland.
Cantonal subsidies in the canton of St. Gallen
In the canton of St. Gallen, the main subsidy for photovoltaic systems is usually provided through Pronovo. Additionally, local programmes may be relevant depending on the municipality or city. In the city of St. Gallen, for example, photovoltaic systems are listed in the energy fund under electricity. Therefore, before requesting a quote, Pronovo, Energiefranken, and any municipal subsidy programmes should be checked.
Municipal and energy supplier subsidies
In addition to the federal government and the canton, municipalities, cities, or energy suppliers may also offer their own subsidy programmes. Therefore, subsidies should always be checked based on the specific address. In the canton of St. Gallen, SAK, St. Galler Stadtwerke, and local utilities are the most relevant grid operators; feed-in tariffs paid by the grid operator and any additional programmes vary depending on the network area.
Tax notes in the canton of St. Gallen
For tax purposes, a distinction must be made between existing buildings and new builds in St. Gallen. For existing buildings, investments in a photovoltaic system on one’s own roof can generally be deductible as an energy-saving or environmental protection measure.
For new buildings or systems within two years of new construction, different rules apply. Battery storage can also be tax-relevant. The current practice of the cantonal tax office is decisive.
Feed-in remuneration and feed-in tariffs in the canton of St. Gallen
Feed-in tariffs paid by the grid operator are not uniform across cantons; the grid operator is decisive. From 2026 onwards, if there is no agreement between the grid operator and the system operator, the quarterly calculated reference market price of the Federal Council serves as the basis. Minimum remuneration applies to photovoltaic systems under 150 kW; for systems up to 30 kW, this amount is 6 Rp./kWh. Guarantees of origin and local green electricity models should be checked separately. Details on the page Feed-in Remuneration Switzerland.
Economically, self-consumption is the decisive lever. Whether a storage system is worthwhile is clarified on the page PV system with storage; for apartment buildings and areas, association for self-consumption (ZEV), vZEV and from 2026 also local electricity communities (LEG) should be considered.
Who benefits most from photovoltaics in the canton of St. Gallen?
Typical situations can be categorised for this canton as follows:
| Situation | Assessment |
|---|---|
| Single-family home with a good roof | Often worth checking, EIV + tax deduction have a strong effect |
| Heat pump present or planned | Self-consumption particularly valuable |
| E-car present or planned | Charging times matter, EMS is worthwhile |
| Apartment building / condominium ownership | Check ZEV, vZEV and LEG from 2026 onwards |
| Commercial / Agriculture | Daily consumption often matches well with solar production |
| Small or shaded roof | Get an exact calculation |
What remains decisive is how well roof area, self-consumption, subsidies, and feed-in tariff paid by the grid operator work together.
Checklist before the quote
Before requesting a quote, this information should be available so that the subsidy and cost-effectiveness can be checked properly:
- Address and municipality
- Roof area, orientation, slope, shading
- System size in kWp
- Current electricity consumption and future outlook (heat pump, electric car)
- Storage yes/no
- Solar thermal additionally?
- Tax deduction: Is it sensible to spread it over several years?
- Grid operator and feed-in tariff paid by the grid operator
- Cantonal programmes and municipality contributions (Energiefranken)
- Check the subsidy process early: KLEIV is generally paid after commissioning; for GREIV, HEIV, as well as cantonal or municipal programmes, different deadlines may apply.
With this information, the specialist installer can assess subsidy, self-consumption and technical design significantly more robustly.
solar-guide.ch recommends: For businesses in the Rhine Valley, the combination of PV + heat pump + self-consumption is particularly attractive. Cantonal and municipal programmes should be checked early, as some deadlines are time-limited.
Conclusion
In the canton of St. Gallen, several levels interact in 2026: one-off payment from the federal government, cantonal or municipal contributions, feed-in tariff paid by the grid operator, self-consumption and tax deduction. Check specific amounts and deadlines based on your location; depending on the programme, the application is made either before construction begins or only after commissioning.
Would you like to know which subsidy is available for your solar system in the canton of St. Gallen? You can submit your request free of charge and without obligation via solar-guide.ch. Your request will be forwarded to a maximum of three suitable specialist installers in your region.
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Frequently asked questions and answers
What subsidies for solar systems are available in the canton of St. Gallen in 2026?
Nationally, the one-off payment via Pronovo (KLEIV/GREIV/HEIV) and from 2026 the winter electricity bonus for larger systems. Cantonal programmes focus on building renovation, heating replacement and consulting – specific contributions should be checked based on location.
Are there cantonal contributions in addition to the Pronovo subsidy?
This depends on the current programme. The main contribution for standard PV usually comes via the one-off payment; cantonal and municipal additional contributions are possible in specific cases. Overview: Energiefranken.
Is battery storage subsidised in the canton of St. Gallen?
There is no comprehensive federal or cantonal subsidy for battery storage in 2026. Individual municipalities or energy suppliers may provide contributions – check via Energiefranken.
Are there municipal contributions for photovoltaics?
In some municipalities yes, with very different rates. Amounts and deadlines change; overview on Energiefranken.
Can I deduct a solar system for tax purposes?
For existing buildings, generally yes, as property maintenance. Subsidies received are deducted from the deductible amount. The cantonal tax office provides binding information.
Who helps with the subsidy application?
Your specialist installer usually handles the application to Pronovo on your behalf. Cantonal and municipal applications should be submitted by you or your installer in good time – before construction begins.
