System Sizing Calculator
Estimate the solar system size you need based on your energy consumption and location.
Your Inputs
Check your power bill for your daily kWh average.
Map: most of the US gets 4-6. Reset to 5 as a default.
Results
System Size Needed
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kW (DC)
Number of Panels
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panels
About These Numbers
- System size is the DC array size before inverter losses.
- Roof area: approximate 1 panel footprint is 1.7m×1.1m (~2 m²).
- Add 20% buffer if you plan to grow your usage or add EVs later.
Approx. Roof Space
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With 20% Buffer
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