Solar Carport Sizing Calculator

Size a solar carport structure based on parking spaces, panel specs, and local sun hours.

Total parking spaces the carport covers. Each space provides roof area for solar panels.
spaces
Standard parking space width is typically 8.5-9 ft. Compact spaces may be 7.5 ft.
ft
Standard length is 18-20 ft. The canopy extends the full length.
ft
Wattage per panel. Standard 370-425W residential, 500W+ commercial. A 400W panel is ~21.5 sq ft.
W
Average daily peak sun hours. US range: 3-7 hrs/day. Check NREL PVWatts for your area.
hrs/day

Results

Total Roof Area-sq ft
Panels That Fit-panels
System Size-kW
Daily Production-kWh
Annual Production-kWh
EV Charging Equivalent-cars/day
References: Standard parking dimensions per ADA/local zoning. Panel area ~21.5 sq ft for 400W. 85% packing factor for structural gaps. 14% system losses. EV estimate based on 30 kWh per full charge (~100 mi range).