Solar panels produce DC electricity. This can be used to charge batteries or power specialist DC appliances. To use this electricity for standard appliances, it has to be converted to AC electricity by an inverter.
Solar arrays are usually connected to inverters that convert their output to 240V AC power. In a domestic grid connect installation, this inverter will interact with the grid supply to the house, so that it can supply the house’s power needs and feed power to the grid when there is an excess.
In installations with multiple arrays, like the Solar Centre, the output from the inverters are marshalled at a switchboard, before connecting to the grid.
At the Solar Centre, a transformer converts the electricity to high voltage for transportation, after the power is marshalled.