United States
New York rooftop solar case study
US homeowners combine PVWatts modeling with time-of-use tariffs, tax credits, and strong sun to keep payback compelling coast to coast.
Payback / System Size
System Size
10.5 kW
Annual Yield
12,500 kWh per year
Payback
9.1 years
Avg install cost
€21,000
Annual savings
€2,300 per year
Lifetime value
€43,000
Why this city shines
A Brooklyn brownstone models 10.5 kW across two roof planes; PVWatts shows 12.5 MWh yearly under ConEd TOU rates.
Rooftop solar in New York works with a 10.5 kW array that delivers about 12,500 kWh yearly. Install costs near €21,000 translate to roughly €2,300 annual savings and a 9.1-year payback under typical tariffs.
Offsets roughly 5.2 tonnes of CO2 annually.