Grid-connected or a grid-tier solar system is a great option! Your home can draw electricity from the grid if there isn’t enough power being generated by the solar panels or stored in the solar batteries (if applicable).
A grid-connected or grid-tied solar system is connected to the electrical power grid (mains power). Any electricity produced by a grid-connected system but not needed by your house (or solar batteries) is simply exported back to the grid, and purchased by your electricity retailer by the kWh (kilowatt-hour) at a set price (buyback rate). The buyback rate differs across retailers but is generally between 7c and 12.5c per kWh. Check with your retailer to confirm your rate.