The Balance-Of-System includes:
Cables/wires – to transport the electricity from the solar modules to the grid.
Protective conduit – to protect the electrical cables
Switches/isolators- to provide ways of stopping the current and voltage to the equipment, allowing servicing, or in the event of an emergency
Enclosures – protecting the switches and isolators
Earthing lugs- to connect the solar modules to the earthing system of the house
Labels- giving clear indication of what the system includes and instruction on how to turn the system off
Australian and New Zealand electrical standards strictly govern what and how solar components can be used to ensure maximum safety.