We are currently on the default fixed rate in Victoria (which, for now, I’m happy with). We are attempting to self-consume as much as we can.
To understand how successful we are and whether we would be better off under a different scheme, I need to understand our usage patterns. That is all I’m aiming for at this stage.
Once we have optimised our arrangements (and consumption habits) I plan go into the sort of financial analysis you are suggesting, to fully asses the effectiveness of our panels. (Although I can’t really tell the installers to come and collect them and give us our money back, if I don’t like what I find).