Solar Panel Sizing Calculator
PROCalculate the optimal solar panel system size based on your daily energy consumption and location. Supports 50+ global locations with accurate solar irradiance data.
Solar Design Workflow
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1System Requirements
Average household: 10-30 kWh/day
Annual average hours of peak sunlight per day
0%25%50%
10% (ideal)20% (typical)30% (high)
Ready to Calculate
Enter your energy requirements and location to get your optimal solar panel system size.
Quick Reference
1
PSH (Peak Sun Hours): Equivalent hours of 1000 W/m² solar radiation per day
2
System Losses: Includes wiring, inverter, soiling, shading (~14-20% typical)
3
Safety Margin: Extra capacity for cloudy days and future consumption growth
Panel Technology Comparison
| Technology | Efficiency | Area per kW | Degradation/year | Warranty | Best For |
|---|---|---|---|---|---|
| monocrystalline | 21% | 5 m² | 0.4% | 25 years | Limited space, maximum efficiency |
| polycrystalline | 17% | 6.5 m² | 0.5% | 25 years | Budget-friendly, good efficiency |
| thin-film | 13% | 8.5 m² | 0.8% | 20 years | Large areas, hot climates |