The Federal Government solar rebate is still in effect and can be explained in this way. Depending on your location in Australia and the size of your system, it will be eligible for a number of credits called Small Technology Certificates or STC’s. For instance, the most common size system installed in homes now is a 5 kW inverter with 6.6kW of panels. The panels of 6.6kW are eligible in 2018 Sunshine Coast for 118 STCs. Each STC has a market value that fluctuates based on the demand for the purchase of STC’s that energy-intensive companies are required to purchase to offset their energy use. Currently, the market value of the STC is at $36 and so 36 x 118 = $4248 which is deducted from the Customers whole system price if the customer elects to sign the STCs over to the Solar Installer who will then claim them to offset the discounted solar price. A customer is entitled not to sign over the STCs and claim them personally, however, the customer will be required to pay the full system price. In 99.99% of transactions, the customer will assign the STCs to the installer and pay for the discounted price.
For an in depth explanation of the STCs see the official government page.
To see how to calculate the number of STCs your system is worth, use the calculator here.