Solar Photovoltaic Planning Engine

Solar Capacity & Generation Sizing Estimator

Estimate indicative system kW capacity, roof area requirements, and estimated monthly kWh generation based on local Pakistani peak solar irradiation figures.

System Sizing Parameters

Installation City / Region *

Property Classification *

Monthly Electricity Consumption (kWh / Units) *

kWh

Check your electricity bill for average units consumed per month.

Monthly Electricity Bill (PKR)Optional reference

PKR

Usable Shadow-Free Roof Area (m²)Optional constraint

m²

1 square meter ≈ 10.76 square feet. Leave blank if roof area is unmeasured.

Estimated Daytime Consumption (%)Optional

20% (Evening heavy)60% Daytime100% (Daylight plant)

Indicative Solar Output

Estimated System Capacity

22 kW

Est. Monthly Generation

2,504 kWh/mo

~30,048 kWh annually

Indicative Roof Footprint

150 m²

~1614 sq ft shadow-free

Consumption Offset

~100%

Based on 2500 kWh bill

Regional Peak Sun Hours

4.8 hrs/day

Benchmark for Lahore

Explicit Planning Assumptions Applied:

Benchmark daily irradiation: 4.8 Peak Sun Hours (Lahore)
System Performance Ratio: 78% (accounting for cabling, temperature coefficient, and inverter efficiency)
Mounting area factor: 6.8 m² per installed kW
Formula: System Capacity (kW) × Peak Sun Hours × 30.4 Days × 0.78 PR

Mandatory Disclaimer: These estimates are illustrative planning figures, not a technical site assessment or financial quotation. Actual system sizing and generation depend on location, roof conditions, shading, equipment, consumption patterns, and applicable regulations.

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