Solar panels contain photovoltaic cells that capture sunlight and convert into direct current which can be collected and channeled. Panels are grouped and wired together forming an array on rooftops of ground in large solar farms. Multiple cables from rows of connected panels terminate in an electrical box containing fuses.

In order to be utilized, the power must then go to an inverter. Since the power that is collected is direct current, it must be converted to alternating current to be used by consumers. This takes place in the inverter. Transformers are required to send the power back into the grid and the utilities.

The marking of electrical wires and terminal ends is critical to ensure the proper, safe and compliant flow of power and functioning of equipment. Arc flash labels and voltage markers provide the warnings about the dangers of high voltages in electrical boxes and transformer labels warn of the dangers in electrical transformers and of the safe clearances required around them.