📐 System Size Calculator
Determine the right solar panel system size for your energy needs
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Your Energy Consumption
Recommended System
System Size
0 kW
Number of Panels
0
Annual Production
0 kWh
Roof Space Needed
0 sq ft
Est. System Cost
$0
📏 Roof Space: Each 400W panel requires about 18 sq ft. South-facing roofs with minimal shading produce best results.
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Sizing Your Solar System
The right solar system size depends on your energy consumption and goals. Most homes need 5-10 kW systems, but the ideal size varies based on usage patterns and available roof space.
How to Determine System Size
- Review your electricity bills for annual kWh usage
- Decide how much of your usage to offset (80-100%)
- Factor in your roof's sun exposure hours
- Consider future needs (EV, heat pump, etc.)