Finland
Helsinki rooftop solar case study
Finnish prosumers leverage battery-ready tariffs and winter reflection to boost annual yield.
Payback / System Size
System Size
6.0 kW
Annual Yield
5,200 kWh per year
Payback
6.5 years
Avg install cost
€10,500
Annual savings
€1,450 per year
Lifetime value
€23,500
Why this city shines
A Helsinki townhouse sized 6 kW and uses snow-reflection boosts plus smart-meter tariffs to cut bills by EUR 1,450.
Rooftop solar in Helsinki works with a 6.0 kW array that delivers about 5,200 kWh yearly. Install costs near €10,500 translate to roughly €1,450 annual savings and a 6.5-year payback under typical tariffs.
Offsets roughly 2.1 tonnes of CO2 annually.