United Kingdom
London rooftop solar case study
Smart import/export tariffs and high daytime prices keep UK rooftops competitive.
Payback / System Size
System Size
7.0 kW
Annual Yield
6,400 kWh per year
Payback
6.0 years
Avg install cost
€12,000
Annual savings
€2,000 per year
Lifetime value
€32,000
Why this city shines
A Southwark retrofit installed 7 kW, feeding agile tariff exports while covering induction cooking and EV charging.
Rooftop solar in London works with a 7.0 kW array that delivers about 6,400 kWh yearly. Install costs near €12,000 translate to roughly €2,000 annual savings and a 6.0-year payback under typical tariffs.
Offsets roughly 2.6 tonnes of CO2 annually.