Photovoltaic panel camera inspection

Can imaging technologies be used to analyze faults in photovoltaic (PV) modules?

This paper presents a review of imaging technologies and methods for analysis and characterization of faults in photovoltaic (PV) modules. The paper provides a brief overview of PV system (PVS) reliability studies and monitoring approaches where fault related PVS power loss is evaluated.

How do you use electroluminescence imaging to inspect a solar panel?

To inspect a solar panel using electroluminescence imaging, the photovoltaic module must first be applied with an electric current and then be imaged with a camera that is sensitive to the light wavelength of the material being observed (commonly a type of crystalline silicone).

Which IR camera should be used for PV module inspection?

An IR camera suitable for PV module inspection should meet certain requirements, such as a resolution of at least 640 x 480 pixels. According to the IEA, lower class cameras have a resolution of 160 x 120 pixels. Gradients over 20 degrees Celsius can cause degradation of a panel’s output.

Do I need a 3 cm camera for a PV comprehensive inspection?

A 3 cm resolution camera is required for a typical PV comprehensive inspection to comply with the IEC thermography standard for detecting fine faults as well as their types. This is because of its ability to accurately measure the absolute temperature of the solar panels.

Why is electroluminescence imaging used in photovoltaic (PV) solar panels?

Electroluminescence (EL) imaging of photovoltaic (PV) solar panels provides high accuracy in detecting defects and faults, such as cracks, broken cells, interconnections, shunts, among many others; furthermore, the EL technique is used extensively due to a high level of detail and direct relationship to injected carrier density.

How accurate is PV panel monitoring?

However, under relatively relaxed environmental conditions, several researchers have successfully achieved accurate PV panels monitoring. For instance, in a diagnostic at PV cell level was suggested using IR scanning of a wide PV plant.