In regards to how Centrelink deal with this in regards to solar...

In regards to how Centrelink deal with this in regards to solar PV...

http://www.centrelink.gov.au/internet/internet.nsf/payments/feed_in_tariffs.htm.

If you are paid in credit its not treated as income. If you are producing excess to your requirements and get cash back then its treated as income.

I haven't found any details from the ATO yet.