howmuchsun

Off-grid solar sizing in Portugal

What a year-round off-grid system costs you in 3 cities, sized against the worst month rather than the annual average.

CityAnnual per kWWorst monthArray for 3 kWh/daySeasonal swing
Lisbon 1,579 kWh December 1.41 kW 1.9×
Porto 1,508 kWh December 1.49 kW 1.9×
Braga 1,403 kWh December 1.62 kW 2.0×

How these figures are calculated