Solar Panel Maintenance in Switzerland — Costs and Process
A solar panel system requires little maintenance — but not none. Those who regularly check and maintain their system ensure full output over the entire lifespan of 25–30 years. This page explains what maintenance involves, what it costs and how often the system should be checked.
CHF 150–300
typical maintenance costs per year
incl. inspection and minor cleaning
1x per year
recommended inspection
professional by certified specialist
25–30 years
lifespan with good maintenance
with manufacturer performance warranty
Why it pays off
Why is maintenance important?
A neglected system produces less electricity — often without the owner noticing. Dirty modules, loose connections or an ageing inverter can reduce production by 10–20%.
Regular maintenance protects your investment and ensures the system always runs at the optimal level — over the entire lifespan of 25–30 years.
Unmaintained system
−10–20% output
Maintained system
100% performance
Warranty protection
25–30 years
Maintenance costs
from CHF 150/year
Services overview
What does solar panel maintenance include?
Visual inspection of modules
Once a year, the modules should be checked for dirt, cracks, discolouration or damage. Bird droppings, leaves and moss can noticeably reduce production.
Module cleaning
In Switzerland, rain is usually sufficient to keep the modules clean. In dusty regions or with heavy bird activity, manual cleaning may be useful.
Inverter inspection
The inverter is the heart of the system. It should be checked annually for errors, overheating and correct functioning.
Electrical connection checks
Cable connections, connectors and terminals can loosen over time. Regular checks prevent failures and fire risks.
Production monitoring
Modern systems have digital monitoring. Anyone who regularly monitors production data will immediately detect deviations.
Roof inspection
During the annual inspection, the roof around the mounting should also be checked — for watertightness and stability of the substructure.
Cost overview
How much does maintenance cost in Switzerland?
Over the entire lifespan of 25 years, this amounts to maintenance costs of approximately CHF 4,000–7,500 — a small amount compared to the total investment.
| Service | Cost |
|---|---|
| Annual inspection (without cleaning) | CHF 100–200 |
| Module cleaning | CHF 100–300 depending on size |
| Inverter replacement (after 10–15 years) | CHF 1,500–3,000 |
| Minor damage repair | CHF 200–500 |
| Annual total costs (average) | CHF 150–300/year |
Maintenance intervals
How often should a solar system be maintained?
For a complete all-in-one solution with battery and heat pump, the same intervals apply — the installer handles the coordination.
| Measure | Frequency |
|---|---|
| Visual inspection | 2x per year (recommended) |
| Professional inspection | 1x per year |
| Module cleaning | As needed, min. 1x per year |
| Inverter check | 1x per year |
| Electrical check | Every 2–3 years |
| Inverter replacement | After 10–15 years |
DIY work
Can I do the maintenance myself?
The visual inspection and basic cleaning can be carried out by the homeowner. For everything electrical — connections, inverter, terminals — a certified specialist must be engaged.
Important: Roof work should always be carried out by professionals for safety reasons.
Warranties
What warranties exist on a solar system?
Modules
25–30 years performance warranty (min. 80% of rated output)
Inverter
5–12 years manufacturer warranty, extendable
Installation
Depends on installer, typically 5–10 years
A good provider explains all warranties transparently before purchase.
Submit a maintenance request now
Do you have an existing system that needs maintenance? Or are you planning a new system and would like to take out a maintenance contract straight away? We connect you with the right partner.
Get free quoteFirst compare quotes? Or all providers at a glance?
Frequently asked questions
Frequently Asked Questions
Do I need to clean my solar panels regularly?+
In Switzerland, rain is sufficient in most cases. In areas with heavy bird activity or in dusty regions, manual cleaning once a year is recommended.
How much does a maintenance contract for a solar system cost?+
Many installers offer maintenance contracts for CHF 150–300 per year, which include an annual inspection and minor repairs.
How long does an inverter last?+
Inverters typically last 10 to 15 years. A replacement costs between CHF 1,500 and 3,000 depending on the model.
Do I lose the warranty if I do the maintenance myself?+
The visual inspection and cleaning of the modules can be done without voiding the warranty. However, electrical work must be carried out by a certified specialist.
How do I know if my system is not producing optimally?+
Via the digital monitoring of the inverter, you can track daily production. If production deviates significantly from the previous year without an obvious reason, you should request an inspection.
Who can carry out maintenance on my solar system?+
Certified Swiss installers offer maintenance services. PVPro.ch also connects you with service partners for existing systems on request.