Put simply, whatever energy doesn’t get used by the household is “exported” to the electricity Grid at a rate determined by the energy retailer. This rate is referred to as a feed in tariff (FIT) and is measured in cents per kilo watt hour (c/kWh). Some electricity retailers offer a higher feed in tariff for excess solar, but it is important to understand what your usage rate is in exchange for a higher FIT. Sometimes, it is not worth sending anything back to the grid because it simply isn’t worth that much.
Another effective way to utilize excess energy generated by solar is to install a Battery. This allows you to store and use solar energy during peak demand periods (4pm-9pm) where charges are higher than off peak periods (daytime).