howmuchsun

Off-grid solar sizing in Jersey

What a year-round off-grid system costs you in 1 city, sized against the worst month rather than the annual average.

CityAnnual per kWWorst monthArray for 3 kWh/daySeasonal swing
Saint Helier 1,197 kWh December 3.05 kW 3.6×

How these figures are calculated