Expert Guide

Babu

Land & Survey

Solar Panel Roof Area Calculator

Quality Inspector

Kaka

Estimate roof space for solar PV.

📐 Formula & Method

Panels = (Area × 0.8) / PanelArea. 20% area kept for spacing.

Panels = (UsableArea × 0.8) / PanelArea

📋 Worked Example

50 m² roof with 450W panels:
• Usable = 40 m²
• Panels ≈ 19 nos
• Capacity ≈ 8.5 kW

❓ Frequently Asked Questions

How much space does 1kW need?

Approximately 100 sq.ft (9-10 m²) is required per 1kW of solar installation.