France
Lyon rooftop solar case study
Case studies from France highlight steady net-metering credits and compact roofs that still close ROI in about eight years.
Payback / System Size
System Size
6.4 kW
Annual Yield
7,500 kWh per year
Payback
6.9 years
Avg install cost
€10,400
Annual savings
€1,850 per year
Lifetime value
€29,500
Why this city shines
Lyon homeowners tilt 6.4 kW toward the Rhone valley sun, netting 7.5 MWh annually and recovering EUR 10,400 installs in under seven years.
Rooftop solar in Lyon works with a 6.4 kW array that delivers about 7,500 kWh yearly. Install costs near €10,400 translate to roughly €1,850 annual savings and a 6.9-year payback under typical tariffs.
Offsets roughly 2.7 tonnes of CO2 annually.