What type of current is generated by PV roof panels?

Photovoltaic (PV) roof panels generate Direct Current (DC). This is because the solar cells in the panels convert sunlight directly into electrical energy in the form of DC electricity. This DC output is produced as a steady flow of electrons in one direction, which is characteristic of direct current.

In many solar power systems, this DC electricity is then often converted to Alternating Current (AC) by an inverter for use in residential or commercial electrical systems, as most appliances and electrical grids run on AC. However, the key point is that the initial output from the PV panels is always DC.

Understanding this distinction is fundamental for fire service professionals, as it relates directly to safety and handling of electrical systems during firefighting and rescue operations, especially when dealing with solar installations.