1–3: Qualifications, certifications and experience
Always ask for proof of a recognised qualification. The installer must be registered in the relevant electrical register and have proven experience with systems of your size.
- Electrician with official register entry
- Pronovo registration for EIV processing
- At least 20 reference installations
- Experience with local grid operators
Only registered installers can apply for the EIV subsidy – always check this.
4–5: Quote, planning and guarantees
A good quote always includes: detailed system plan, yield forecast, component list with manufacturers, separate installation and material guarantees.
Require a 10-year workmanship guarantee and check manufacturer guarantees for modules (usually 25 years) and inverter (5–10 years).
- Yield forecast with and without battery
- Module manufacturer guarantee: 25 years
- Inverter guarantee: 5–10 years
- Installation guarantee: at least 5–10 years
6–7: Local presence and after-sales service
Prefer local installers based in your region who can respond quickly to service requests. A company 200 km away will be slow to respond when problems arise.
Ask explicitly about after-sales service: who comes for annual maintenance? How long is the contact person reachable?
- Company in your region
- Annual maintenance offered
- Reachable contact person after installation
- Reference customers in your municipality
Compare up to 3 vetted quotes now
PVPro vets every installer against these 7 criteria. You only receive quotes from qualified, local companies.
Request a free quoteFAQ
What certifications are required for solar installers in Switzerland?+
The installer must be registered in the relevant electrical register under NIV. For the EIV application, an additional Pronovo registration is needed.
How many quotes should I obtain?+
At least 3 quotes from different companies. Price differences of 20–35% for equivalent quality are common. PVPro delivers up to 3 vetted quotes within a few days.
What to do if the installer is unreachable after installation?+
Document everything in writing and choose an established company with references. PVPro partners all have at least 3 years of trading history and local presence.
Are there bad actors in the solar industry?+
Unfortunately yes. Common warning signs: no local company, no written quote, pressure for immediate signature, missing certification proof. Via PVPro you only receive vetted companies.