Photovoltaic (PV) fires are very rare but when they do occur the consequences can be serious for facilities and first responders, especially in the event of a fire on a ship or a yacht. The causes of fires mainly relate to the electrical installation (e.g., poorly designed systems, incorrectly installed equipment, faulty connections, defective products, overvoltage, and voltage surges) but also to defects and damage of the panels themselves (such as scratches, microcracks, etc.). Thermography is a useful method for quickly detecting local temperature increases, which may indicate incorrect operation of the electrical installation and panel, resulting from their incorrect configuration, faults, or damage. Local increases in temperature (hot spots) may increase the risk of fire. The laboratory tests carried out on the photovoltaic system allowed for the illustration of the temperature distribution of the PV panel, electricity receiver, and electrical connections in real conditions.