Solar Panel Calculator

Calculate how many solar panels you need based on your daily energy consumption. This calculator helps you determine the right size for your solar power system.

Your average daily electricity consumption
Average peak sun hours in your location (typically 4-6 hours)
Power rating of each solar panel (common sizes: 300W-500W)
Total system losses including inverter, wiring, dust, etc. (typically 20-25%)

How to Use This Calculator

  1. Daily Energy Usage: Enter your average daily electricity consumption in kilowatt-hours (kWh). You can find this on your electricity bill or by dividing your monthly usage by 30.
  2. Peak Sun Hours: Enter the average number of peak sun hours in your location. This varies by geography and season.
  3. Panel Wattage: Enter the power rating of the solar panels you plan to use. Modern panels typically range from 300W to 500W.
  4. System Losses: Account for various system losses including inverter efficiency, wire losses, dust, and temperature effects.

Understanding the Results

  • Required System Size: The total solar power system capacity needed in kilowatts (kW).
  • Number of Panels: The estimated number of solar panels needed to meet your energy requirements.
  • Roof Area: Approximate roof space needed for the solar panel installation (assumes 2m² per panel).

Note: This calculator provides estimates based on typical conditions. Actual requirements may vary based on specific local factors such as:

  • Local climate and weather patterns
  • Roof orientation and tilt
  • Shading from nearby objects
  • Local installation regulations

For precise calculations, consult with a local solar installation professional.