gm, I forgot to put in response to you, lets come back here in a...

gm, I forgot to put in response to you, lets come back here in a couple of years when a new generation of high efficiency solar panels are available dirt cheap, plus bigger rebates to instal them and discuss the financial side then, and who may or may not be a dill.
According to Green Frog, a 2kW installation such as I believe you have, installed in Canberra, will generate about 2750kWhrs over an average year. At current prices that is about about $123. At 5 times the current price that is about $600, still not a lot, and that is depending on the panels not being damaged for any reason.