In WA you are not allowed to keep your existing electro mechanically meter after you have a PV system installed even though it will run quite happily and not interfere with existing power supply system.
In the US
Net Metering— In more than 35 states, customers who own PV systems can benefit from laws and regulations that require “net” electric meter reading. The customer is billed for the net electricity purchased from the utility over the entire billing period—that is, the difference between the electricity coming from the power grid and the electricity generated by the PV system. Through net metering, the customer obtains the full retail electricity rate—rather than the much lower wholesale rate—for kilowatt-hours of PV-produced electricity sent to the utility power grid.
This same generousity is not available in Australia at least in WA nor other states as far as I am aware. When the REBS schemes where offerred you weren't given this option. You are made to have a smart meter installed at your cost so that the Electricity Utility could monitor production and consumption.
With the cancelling of the rebate schemes in WA they now only have to pay you the lesser wholesale rate of 7c kwh yet force you to instal a smart meter if you decide to have a PV system.
Now in my opinion that is illegal and blantant theivery- how are they being fair and and reasonable as required under the Federal Renewable Energy agreements.
At least in WA we now have a Labour shadow minister that has a good chance of winning the next State election and hopefully may change things, who knows.