Solar PV Module Thermography Survey

It covers the inspection scope, ambient conditions, module surface and cell condition, string and combiner thermography, electrical safety controls, and final corrective actions. The template is built for photovoltaic arrays under load, so it helps you document hot spots, cracked cells, bypass diode behavior, failed strings, and overheated terminations. It is meant to produce a clear defect record with image references and repair follow-up.

Use it when the array is operating under normal load and you need to compare temperatures across modules, strings, and connections. It is especially useful after production complaints, inverter alarms, storm events, maintenance work, or when you are building a preventive maintenance program. It is not the right template for a de-energized visual-only inspection, because thermal anomalies require energized operating conditions.

The inspector should be qualified to perform infrared thermography and understand PV electrical hazards. In practice, that usually means a trained maintenance technician, electrical contractor, or thermography specialist working under site access controls. If energized terminations are being observed, the person performing the survey should also follow the site's electrical safety procedures and PPE requirements.

Yes, it is structured to support safe work practices around energized electrical equipment and controlled access. It aligns with the general expectations of OSHA electrical safety rules, lockout-tagout practices when equipment is de-energized, and common industry electrical safety programs. It also helps create the documentation trail many sites need for internal audits, contractor oversight, and corrective action tracking.

The biggest mistake is scanning when the array is not under stable load, which can hide or distort thermal differences. Another common issue is failing to record the module or string identifier, making the finding hard to repair later. Teams also miss connection defects when they focus only on module surfaces and ignore combiner boxes, fuse holders, disconnects, and exposed terminations.

Yes, the scope section can be narrowed or expanded to match rooftop, carport, ground-mount, or utility-scale systems. You can add site-specific equipment such as inverters, trackers, combiner layouts, or access restrictions. The core structure stays the same, but the identifiers, locations, and corrective action fields should match how your site labels strings and equipment.

Frequency depends on site risk, equipment age, and maintenance strategy. Many operators schedule it as part of preventive maintenance, after major weather events, or when performance drops suggest a hidden defect. High-value or problem-prone arrays may need more frequent surveys than newer systems with stable operating history.

A general maintenance checklist usually covers cleaning, physical condition, and basic operational checks, while this template is focused on thermal anomalies and electrical defect detection. That makes it better for finding issues that are not obvious from a walk-through, such as a failing connector or a string running hotter than its neighbors. It is a better fit when the goal is diagnosis and documented corrective action rather than routine housekeeping.