Why Canton Matters as Much as Your Roof
Switzerland's federalist structure means solar support goes well beyond the Pronovo Einmalvergütung. Each of the 26 cantons runs its own energy policy, and many municipalities add a third layer on top. For a 10 kWp residential system, the combined federal plus cantonal package can range from CHF 7,000 to CHF 19,000 depending on where you install — a difference that can shorten payback by two to three years.
With average grid electricity prices sitting at around CHF 0.27/kWh in 2025/2026, the financial case for solar is already strong everywhere in Switzerland. Cantonal bonuses simply make it stronger.
Snapshot of Key Cantonal Programmes in 2026
| Canton | Programme | Typical additional grant | Notes |
|---|---|---|---|
| Bern | Kanton Bern Energieförderung | CHF 800–2,000 per installation | Applies to systems ≥2 kWp; funding via cantonal Energiefachstelle |
| Geneva (GE) | SIG / État de Genève subsidy | CHF 600–1,500 flat rate | Coordinated through SIG utility; strong push for BIPV |
| Zurich (ZH) | Kanton Zürich — no cantonal bonus | Communal grants only | Several Zurich communes (e.g., Dietikon, Uster) offer CHF 300–800 |
| Basel-Stadt | Amt für Umwelt und Energie | CHF 1,000–3,000 | Among the most generous; BIPV premium available |
| Vaud | Canton de Vaud EnerGo | CHF 500–1,200 | Accessible via online portal |
| Aargau | Aargau Energieförderprogramm | CHF 400–900 | Requires certified installer |
| St. Gallen | Energie Förderprogramm SG | CHF 500–1,100 | Higher amounts for heat-pump combo installs |
| Ticino | Cantone Ticino — DAEC | CHF 600–1,400 | Italian-language portal; combine with national EIV |
Note: Grant amounts are approximate and updated annually. Always verify current figures directly with your cantonal Energiefachstelle or via EnergieSchweiz before budgeting.
How to Find and Apply for Cantonal Bonuses
Step 1: Use the EnergieSchweiz subsidy finder
The federal EnergieSchweiz portal at energieschweiz.ch maintains a national subsidy database. Enter your postcode to see both cantonal and communal programmes relevant to your address.
→ Curious what solar would actually put back in your pocket? Run a free 60-second estimate.
Step 2: Contact your cantonal Energiefachstelle
Each canton has an energy advisory office. They can confirm current funding levels, application deadlines, and any minimum technical requirements specific to your canton.
Step 3: Check your commune
Beyond cantonal grants, some municipalities offer additional bonuses. Cities like Biel/Bienne, Winterthur, and several Geneva communes have their own programmes worth CHF 300–1,000.
Step 4: Apply before or immediately after installation
Most cantonal programmes require an application before commissioning or within a defined window post-installation. Unlike the Pronovo EIV (which you register after commissioning), some cantonal grants need pre-approval.
Stacking Multiple Incentives
A typical Swiss homeowner in Bern installing a 10 kWp system in 2026 could combine:
- Federal EIV (KLEIV): ~CHF 7,000
- Cantonal Bern bonus: ~CHF 1,200
- Communal bonus (if applicable): ~CHF 500
- Total: ~CHF 8,700 — covering roughly 30–35% of total installation cost
In Basel-Stadt, the same system could attract CHF 10,000–12,000 in combined grants.
Cantons Moving Toward Higher Targets
Following Switzerland's revised Energy Strategy and the net-zero 2050 goal, several cantons are increasing solar incentives for 2026:
- Geneva is prioritising BIPV (building-integrated PV) with premium grants for facades and roof-integrated panels
- Bern has extended its programme funding through 2028 and added a storage bonus
- Zurich has encouraged communes to increase communal grants to offset the lack of a cantonal top-up
Comparing Installer Quotes with Incentives Factored In
When using Comparisun to request quotes, always input your postcode — this allows the platform to calculate net costs after all applicable federal and cantonal grants are subtracted, giving you a true apples-to-apples comparison across installer quotes.
→ Before you read on — see what payback looks like for your roof in under a minute.