Which of the following components is NOT part of a PV roof panel?

A photovoltaic (PV) roof panel primarily consists of cells, which are the fundamental units that convert sunlight into electricity. These cells are grouped together to form modules, which are then arranged in an array to cover a larger surface area and optimize solar energy capture.

Transformers, on the other hand, are not integral components of the PV roof panel itself. They may be used in the solar energy system to regulate voltage and convert the generated electricity for use in the electrical grid or in buildings but are not physically part of the PV roof panels. Therefore, identifying transformers as not being part of a PV roof panel is accurate. This understanding is essential, especially for those in the fire service, as they may encounter such systems during emergency situations and should know the basic components and their functions.