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NABCEP Solar: Irradiance vs Insolation - Power vs Energy
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Avg score: 83% • Most missed: “PVWatts uses historical:”

• Irradiance = instantaneous solar power per area (W/m²).
• Insolation = total solar energy received over time (kWh/m²/day).

NABCEP Solar: Irradiance vs Insolation - Power vs Energy
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8 Questions

1. A 1000 W/m² reading means:
2. Irradiance is measured in:
3. Insolation represents:
4. Peak sun hours relate to:
5. Cloud cover primarily reduces:
6. PVWatts uses historical:
7. A high irradiance reading at noon means:
8. Daily production estimates use:

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