Austria
Vienna rooftop solar case study
Austria's klimaaktiv program plus cooperative utilities create predictable funding for rooftops.
Payback / System Size
System Size
6.7 kW
Annual Yield
7,300 kWh per year
Payback
6.1 years
Avg install cost
€10,800
Annual savings
€1,950 per year
Lifetime value
€30,500
Why this city shines
Vienna townhomes approved 6.7 kW installs that power heat pumps and regional rail commuters' EVs.
Rooftop solar in Vienna works with a 6.7 kW array that delivers about 7,300 kWh yearly. Install costs near €10,800 translate to roughly €1,950 annual savings and a 6.1-year payback under typical tariffs.
Offsets roughly 3.0 tonnes of CO2 annually.