years as a master workshop
FEATURED · MERZHAUSEN
The Hartmann family. 78 % independent.
SYSTEM
9.8 kWp + 10 kWh battery
INSTALLED
June 2025, in two days
BILL
€164 → €22 a month
SAVED EVERY YEAR
€ 1,920
MORE PROJECTS
Every roof is different.
Six of 2,400 – chosen because they look like the houses we are asked about most.
KIRCHZARTEN
Terraced house, family of four
7.2 kWp + 8 kWh · 81 % independent
BREISACH
Heat pump replaces a 1994 oil boiler
12 kW · 64 % subsidy · €2,300 saved a year
FREIBURG-WIEHRE
Solar carport + wallbox
11 kW · 9,000 km a year from the roof
WALDKIRCH
Farmhouse roof, 40 m wide
24.6 kWp · feeds 18,000 kWh into the grid
EMMENDINGEN
Battery added to a 2012 system
10 kWh · self-sufficiency 34 → 72 %
LÖRRACH
New build, all electric
Solar + heat pump + wallbox · no gas connection
IN NUMBERS
What 26 years add up to.
0
0
reviews, average 4.9 ★
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% would recommend us
0
people in our team
4.9 ★ FROM 640 REVIEWS
In their words.
We were sceptical at our age. The house has never been this warm – or this quiet.
Helga & Rolf S., Breisach
Heat pump
Other companies sold us modules. Solvia planned our whole house – and still answers the phone.
Bernd & Kerstin L., Offenburg
Solar + battery + heat pump
I charge the car from the roof. My son thinks the sun is our petrol station.
Tobias M., Freiburg
Solar carport + wallbox
Our old system finally makes sense. We use our own power until midnight now.
Ingrid W., Emmendingen
Battery added
One company for roof, heating and paperwork. The subsidy came before the invoice.
Sabine K., Waldkirch
Solar + heat pump
FREE ROOF CHECK · NO OBLIGATION
Your roof could be next.
Ready for
solar.
heat.
independence.
We look at your roof, your heating and your bills – and tell you honestly what pays off.
or call 0761 555 40 90