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Roof Area Required

Physical + gross roof area with maintenance corridors.

Design

Core inputs only — quick sizing with engineering defaults.

Inputs (SI units)

Module lengthmm

Module widthmm

Module quantity-

Maintenance gap%

Results

Occupied area

51.67 m²

Gross roof area

67.16 m²

Module area (each)

2.583 m²

Save & Load Project

Designs are stored privately in this browser — nothing is uploaded.

Engineering Formula

A_mod = (L × W) / 10⁶ [m²]
A_occupied = N × A_mod
A_gross = A_occupied × (1 + gap%)

Occupied area is the sum of laminate footprints. Gross roof area adds walkways, inverter pads and inter-row spacing typical of Indian rooftop practice (25–40%).

Step-by-step Calculation

1.Module areaA=L×W/10⁶2.583 m²
2.OccupiedN×A51.67 m²
3.With gap×(1+gap)67.16 m²

Design Assumptions

• Portrait mounting; single tilt.
• Gap accounts for O&M walkways and edge setbacks.

Engineering Tips

◆Leave 900 mm perimeter for fire access.
◆Add 20% extra for east-west split roofs.

Warnings

▲Setbacks per NBC 2016 Part-4 (Fire) and local AHJ must be met.

Standards & References

NBC 2016 (India)NFPA 1 §11.12 (US)IEC 62548

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