What we do
Everything your roof needs, from one team
From the first kilowatt to the twentieth year of operation.
Solar installation
Planning, subsidies, mounting and grid connection. Most homes are done in two days.
from CHF 14’900 / 8 kWp
Battery storage
Use your own power in the evening. Retrofit for any existing system.
from CHF 6’400 / 10 kWh
Panel cleaning
Pure-water cleaning without chemicals. Dirty panels lose up to 15% of their output.
from CHF 290 / visit
Inspection & repair
Thermal imaging, inverter checks and repairs, including systems we didn’t install.
from CHF 190 / check
Why Sonnwerk
No subcontractors. No surprises on the invoice.
Our own electricians and roofers do every job. The price in your quote is the price you pay, subsidies included.
We handle the Pronovo subsidy and the building permit
Live monitoring app included with every system
10-year workmanship guarantee on top of the panel warranty
One fixed contact person from first visit to handover
How it works
From roof check to first kilowatt in 6 weeks
1
Free roof check
We visit, measure your roof and look at your power bills. 45 minutes, no obligation.
2
Fixed quote in 48 h
System size, yield, payback time and subsidy amount, all on two pages.
3
Installation
Scaffolding, panels and inverter in one to three days. We clean up every evening.
4
Grid connection
We register the system with your utility and show you the monitoring app.
Recent projects
Roofs that now earn money
Bakery Hofer, Thun
48 kWp
CHF 9’600 saved / yr
Family home, Worb
9.6 kWp
+ battery
Farmhouse, Belp
22 kWp
2 days
Cleaning plans
Keep every panel at full power
What our customers say
“The quote was exactly what we paid, subsidy included. Our bill dropped from CHF 190 to CHF 35 a month.”
Martin S., Worb
“Two days on the roof, and they left the garden cleaner than before. The monitoring app is great.”
Andrea K., Münsingen
“After the first clean our yield went up 11%. The yearly plan pays for itself.”
Bakery Hofer, Thun
Questions before you start
Is my roof suitable for solar?
How much subsidy can I get?
How long does installation take?
How often should panels be cleaned?
Do you clean systems installed by others?
Book your free roof check
Tell us where you live. We’ll call within one working day to find a time.