Required Site Conditions for Infrared Photovoltaic System SurveysFollowing the requirements outlined below will help to ensure optimal conditions and best results. They are based upon industry best practices and currently published standards.
Clear Day: Infrared inspections should be performed on a sunny day with few or no clouds.
Clean, Dry Solar Panels: The surface of solar panels shall be free of dew, condensation, ponded water, snow, ice, dirt, and debris.
Solar Irradiance: Infrared inspections should be conducted on a sunny day while panels are exposed to direct sunlight. Solar panels should be inspected when solar irradiance is at least 650 Watts per square meter across the face of inspected panels. A pyranometer should be used to confirm the solar irradiance at the time of the survey.
Correct Viewing Angle: The infrared imaging system shall be maneuvered in an organized manner to ensure the complete inspection of all panels and equipment, at a viewing angle greater than 45° from the surface of inspected panels.
Winds of less than 15 mph: During the time of the Survey, winds should be less than 15 mph. Stronger winds can result in a cooling effect that may cause defects to go undetected.