The number of solar panels required depends on your home’s electricity usage, your location, and panel wattage.
1. Determine Your Monthly Electricity Use
Typical home: 800–1,200 kWh/month
2. Solar Panel Output
Most residential panels produce:
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350–450 watts
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~ 1.5–2 kWh/day per panel
3. Example Calculation
If your home uses 1,000 kWh per month (~33 kWh/day):
A 400W panel produces ~ 1.8 kWh/day.
Panels needed:
33 ÷ 1.8 ≈ 18–20 panels
4. Factors That Change the Number
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Sunlight hours in your region
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Roof orientation
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Panel age and efficiency
Conclusion
Most homes require 15–25 solar panels for full coverage depending on usage and panel wattage.