Solar System Sizing Calculator

Size the system to the load and roof

Solar System Sizing Calculator
Size the system to the load and roof
ℹ️ About this tool

Sizes a solar PV system to a consumer load and available space — recommended capacity in kW, estimated annual generation, roof area needed and the percentage of the bill it offsets — with the assumptions used. Use this to turn a feasibility into a concrete size. To present it to the customer with pricing use the Rooftop Solar Proposal Builder.

📄 Free guide — what this is, how to use it & cautions

Fill in each detail below as completely and accurately as you can — the more you provide, the more precise and ready-to-use your output will be. * marks required fields.

Units (kWh) per month, or the average monthly bill.
Shadow-free area available for panels.
How much of the bill the customer wants to cover.
Single or three phase, and sanctioned load.
City / state, for sunshine hours.

Delivery & Payment Details

Used for your receipt. Your result appears on-screen and is downloadable as Word & PDF.

Order Summary

Solar System Sizing Calculator₹83.90
GST 18%₹15.10
Total₹99.00

🔒 Secured by Razorpay · All outputs are AI-generated guidance — verify with qualified professionals for binding decisions.