Size Your Solar System
Enter monthly units and sun hours the recommendation updates live.
How system sizing works
Divide your monthly units by 30 for daily consumption, then by the units each kW produces per day (~4-5 in Pakistan) to get the kW size. Panel count is kW × 1000 ÷ 550, rounded up; roof space runs about 100 sq ft per kW on an elevated lenter structure. Systems of 8kW and above generally need a 3-phase connection.
Solar System Size Calculator FAQs
Size to your summer peak (when AC runs and panels derate from heat); winter surplus earns net-billing credit. Sizing only for winter leaves summer bills intact.
About two 550W panels per kW so a 5kW system uses 9-10 panels needing ~500 sq ft of shade-free roof.
Generally for systems above ~7-8kW, or if your meter is already 3-phase. The calculator flags this from your size.
No under net billing, oversizing exports surplus at the lower notified rate, stretching payback. Right-size to your real consumption.
Get the exact size for your roof.
A free survey confirms the size, panel layout and structure for your specific roof and shading.