Photovoltaics (PV) are a method of converting sunlight into direct current (DC) electricity. This DC power can be used directly or converted to AC power for standard applications.

The number of panels in the system determines the total DC watts capable of being generated by the solar array; however, the inverter ultimately governs the amount of AC watts that can be distributed for consumption.

When exposed to direct sunlight, properly operating solar panels should be uniform in temperature, with no pronounced hot spots. Thermal anomalies, or hot spots, are most often caused by defective cells, faulty wiring within panels, partially shaded panels, and/or dirt or debris on the panels.

Performed midday while the panels are exposed to direct sunlight, our Infrared Photovoltaic System Surveys are capable of quickly detecting and documenting defects that can compromise panel efficiency and lead to premature panel failure.

When deciding whether to perform an Infrared Photovoltaic System Survey from the ground, an elevated surface or by aircraft, many factors need to be considered.

Ground-based inspections allow for clearer imagery and ease of problem location.  Inspections may be mobilized quickly and do not require FAA clearance.  Inspections may be performed from above or below panels. 

Elevated vantage point surveys are performed from above panels and can provide a macro view of installed panels.  Inspections may be performed from a higher elevation on a building or from a manlift.

Aerial surveys may be conducted from a manned aircraft or a drone.  Aerial inspections are appropriate when large fields need to be inspected within limited amount of time. Prior to the flight, all FAA requirements must be met with regard to equipment installed on the aircraft, flight safety, security, and noise.  Cost is usually higher than ground-based or elevated vantage point inspections.

Jersey Infrared Consultants can provide Infrared Photovoltaic System Surveys from any of the above vantage points. Please contact us to discuss your specific project and which type of survey will best meet your needs.

To ensure the success of an Infrared Photovoltaic System Survey, subject panels should be clean and dry at the time of the inspection. Inspections are conducted on a clear day while the panels exposed to direct sunlight and solar irradiance is at least 650 Watts/square meter across the face of panels. Winds should be <15 mph during the inspection.

Safety requirements that apply to installed PV systems include:

• NFPA 70E
• Occupational Safety and Health Standards for General Industry 29 CFR, Part 1910
• Occupational Safety and Health Standards for Construction Industry 29 CFR, Part 1926

Jersey Infrared Consultants have a full-time Safety Coordinator, and comprehensive Safety Compliance Program. All field personnel are equipped with the proper PPE.

• Thermographers Comments will discuss the areas inspected, number of problems identified and special notation of any serious problems.

• Equipment name and location
• Ambient temperature
• Temperature rise over similar equipment
• Ammeter readings (where appropriate)
• Detailed comments concerning the problem