Solar Panels & Modules
How many panels do I need for a 5 kW system?
Reviewed by SolvSolar · Last reviewed:
A 5 kW solar system needs about 10 panels of 540 Wp, or 13 panels of 400 Wp. The maths is simply 5,000 W divided by the module wattage, rounded up. Plan for 80-100 sq ft per kW of shade-free roof area, or more if the array is elevated on a structure with inter-row clearance.