Rooftop Solar PV Capacity Calculator

Rooftop Solar PV Capacity Calculator

Monthly Electricity Consumption (kWh / Units):

Available Shade-Free Roof Area (Sq.Ft.):

Preferred Solar Panel Wattage (Watts):

Sizing & Feasibility Results

Recommended Solar Plant Size: 0.0 kW

Estimated Monthly Generation: 0.0 kWh

Required Setup Area: 0 Sq.Ft.

Required Number of Panels

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Solar Sizing Formulas & Rules of Thumb:

• Required Solar Capacity (kW) = Monthly Consumption (kWh) ÷ (Average Daily Solar Generation of 4 kWh/Units per kW × 30 Days).
• Maximum Roof Capacity (kW) = Available Shade-Free Roof Area (Sq.Ft.) ÷ 100 Sq.Ft. (It is standard practice to allocate ~100 Sq.Ft. of shadow-free space per 1 kW of solar installation).
• Final Recommended System Size is capped at the maximum roof capacity to ensure the panels physically fit on your roof.
• Number of Panels = (Recommended kW × 1000) ÷ Solar Panel Wattage (typically 400W to 550W in the commercial market).