For solar panel inspection, the minimum irradiance required is closest to:

For solar panel inspection, the minimum irradiance required is closest to:

• A. 600 W/m^2
• B. 900 W/m^2
• C. 1200 W/m^2
• D. 150 W/m^2

Answer: (A)

Irradiance sets how much light energy is driving the solar cells during inspection, which directly affects both electrical output and the thermal patterns you can see with infrared testing. For a reliable inspection, you need enough sunlight to produce a measurable electrical signal and to create sufficient surface heating contrasts for the infrared camera. Full sun is about 1000 W/m^2, so using a level around 600 W/m^2 gives a practical lower bound—it's bright enough to yield meaningful data without requiring peak sun. A lot of inspections would struggle at much lower light (like 150 W/m^2) because signals become too weak and thermal differences too subtle to detect reliably. Higher irradiance values, such as 900 or 1200 W/m^2, would work fine but aren’t the minimum; 600 W/m^2 is the closest, sensible threshold for performing the inspection.

Irradiance sets how much light energy is driving the solar cells during inspection, which directly affects both electrical output and the thermal patterns you can see with infrared testing. For a reliable inspection, you need enough sunlight to produce a measurable electrical signal and to create sufficient surface heating contrasts for the infrared camera. Full sun is about 1000 W/m^2, so using a level around 600 W/m^2 gives a practical lower bound—it's bright enough to yield meaningful data without requiring peak sun. A lot of inspections would struggle at much lower light (like 150 W/m^2) because signals become too weak and thermal differences too subtle to detect reliably. Higher irradiance values, such as 900 or 1200 W/m^2, would work fine but aren’t the minimum; 600 W/m^2 is the closest, sensible threshold for performing the inspection.