To put it simply, when sunlight hits a photovoltaic (PV) cell (today generally made of silicon) its energy knocks loose electrons, causing an electron flow that creates an electrical current. That current then travels along tiny metallic strips, on the PV cell, to a junction box which is typically located on the back of a solar module. Several solar modules can then be wired together to create an array. Array wiring is then run to an inverter where the DC power, which was created by the solar cells, is converted to AC power. Once the electricity has been converted to AC, it can be interconnected into most electrical distribution panels (breaker box) and thus feed the building with power or backfeed to the utility for a credit.