A grid-connected solar PV system is an array of photovoltaic modules connected via an inverter to provide power for your home, with excess production feeding into the grid.

At night, when the solar modules are not producing electricity, the electricity comes to you from the grid. If you export enough energy during the day, it will balance or exceed the amount you draw from the grid at night.

1. Solar PV modules supplying DC power.
2. An inverter changing the solar DC power into 240V alternating current (AC) suitable for your household appliances and feeding into the grid.
3. Your home uses electricity firstly from the solar PV modules with additional demand supplied from the grid.
4. A meter measuring your electricity production and consumption.
5. Any excess is 'exported' to the electricity grid.