Portugal
Lisbon 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
6.5 kW
Rendement annuel
9,300 kWh per year
Remboursement
5.7 years
Coût d’installation moyen
€9,500
Économies annuelles
€2,200 per year
Valeur sur la durée
€33,500
Pourquoi cette ville brille
A Lisbon duplex sized 6.5 kW to cover cooling loads, locking in 9.3 MWh per year and shrinking the bill by EUR 2,200.
Rooftop solar in Lisbon works with a 6.5 kW array that delivers about 9,300 kWh yearly. Install costs near €9,500 translate to roughly €2,200 annual savings and a 5.7-year payback under typical tariffs.
Offsets roughly 3.8 tonnes of CO2 annually.