A Grid-Connected building generates electricity for use on site. When electricity generation exceeds the amount required, the system supplies the excess power to the utility grid. Conversely, when the electricity demands of the building exceed the amount supplied on site, electricity can be drawn from the power grid. Optimally, a grid-connected building can be net-zero (or net-positive), meaning that the amount of electricity supplied to the grid is equal to (or greater than) the amount drawn from the grid. With the Ontario microFIT Program all generated electricity is supplied to the grid, and all required electricity is drawn from the grid.