Fire hazard is a concern with solar home systems just as with any electrical system. The threat is not spontaneous combustion of the panels, or panel overheating, but faulty wiring or damage to the electrical components of the system. That is why a certified, experienced contractor is usually your best bet when having a solar electric system installed.

Whether installing the system yourself or not, it is important to know the basics of solar PV safety. For instance, a fuse or breaker might pop. It is vital that you understand exactly what happened before replacing or resetting the fuse or breaker. Correct wire size and grounding are also important to efficient and safe operation of your solar electric system. The power capacity of a wire is related to how hot the wire can get. A thicker, more insulated wire can carry more power and thus withstand more heat. If too much power is pumped through inadequate wire, the insulation can melt away and expose the wire, which can cause a fire.

Grounding is also important. If your system is grid-tied then your system should already be grounded through the utility’s system. If your system is off-grid, then you will be required to install a ground for protection against lightning strikes and other hazards. A trained solar contractor will be fully aware of all safety requirements for wiring your solar PV system, but never hesitate to ask questions if you feel the need. Provided everything is put together right (solar electricians go through years of apprenticeship just to make sure it is, always) then you can assuage your fears of fire. However, always keep an eye on your system, and routinely check your charge controller, just to make sure everything is functioning properly.