A solar module is made up of a group of photovoltaic cells. They consist of 2 layers of silicon wafers which become positively and negatively charged when sunlight hits them. The charge created flows through a circuit of small wires connected to the wafers.
The PV modules generate DC electricity and send it to the solar power inverter. The inverter transforms the DC power (Direct Current) from the modules into AC electricity (Alternating Power) and feeds it back to the power grid, ready to be used in the house or exported back into the grid/power poles.