How do you determine whether a structure has a PV system? Perhaps the most obvious indication is an array of solar panels, but not all arrays are visible from the ground. Check for switchgear and/or an inverter near the electric meter, on an external wall or in a utility room. Safety signage can also alert you to the presence of a PV system.

During your size-up, consider the following questions about any PV system you encounter:

• How will it affect crew safety and operations?
• Does it include battery storage?
• How might it be affected by the incident (either now or later)?
• How can it be electrically isolated?