Portugal
Porto rooftop solar case study
Portugal's coastal irradiation plus streamlined permitting delivers sub-six-year paybacks for most rooftops.
Remboursement / Taille du système
Taille du système
6.0 kW
Rendement annuel
8,700 kWh per year
Remboursement
5.9 years
Coût d’installation moyen
€9,200
Économies annuelles
€1,950 per year
Valeur sur la durée
€31,500
Pourquoi cette ville brille
Porto rowhouses lean on 6 kW arrays delivering 8.7 MWh, covering daytime appliances and feeding the Liberalized Market credit.
Rooftop solar in Porto works with a 6.0 kW array that delivers about 8,700 kWh yearly. Install costs near €9,200 translate to roughly €1,950 annual savings and a 5.9-year payback under typical tariffs.
Offsets roughly 3.5 tonnes of CO2 annually.