Do your research
How much per KW buy back do you get
How long will the rebate last
http://www.energymatters.com.au/gove...f.php#victoria
people quoting maginificent refunds on 1.5kw systems IMO must have small homes, small families and are receiving the premium REB rates
a) be quite certain of how much it's going to cost you for a new meter
b) how much you will get per Kwh produced by your system
Other issues to consider if you do get a small system with a larger inverter is can be expensive to upgrade, additional solar panels retail for nearly a $1000, must be installed by a licensed electrician, may affect your REB rate if you upgrade, will in some cases depending on the original install require new heavier duty wiring.
IMHO if you are in WA, forget it, until the State Govt reintroduces a reasonable REBS scheme.