PV systems can be roof-mounted or ground-mounted. Most systems are grid-tied, while some are off-grid or a hybrid of the two.

PV systems generally consist of:

  • Arrays
  • Inverters
  • Conduit
  • Combiner boxes
  • Batteries
  • Meters
  • Disconnect switches

Potential risks of PV systems include:

  • Access limitations
  • Structural failure
  • Trip or slip hazards
  • Enhanced flame spread
  • Shock hazards
  • Toxins and carcinogens
  • Surges and arcing
  • Battery hazards

Always assume components are energized, even if the sun is not shining or if PV panels are damaged. After the system is shut off, inverters still pose a shock hazard until they have completely discharged their stored energy.