This is called a feed-in-tariff and is handled by your electrical company, which monitors the amount of energy you consume and provide. A net feed-in-tariff is the most common type in Australia and appears as a credit in your electrical bill. Note that for most people, who are still connected to the grid despite installing solar, there will be a monthly bill for basic connection and service fees. Many homeowners pay for these fees out of the net feed-in-tariff when applicable.