Hi Marc, AFAIK, off peak electricity is only for people with electric hotwater systems. My mate just changed his energy guzzler (heating his pool, in Melbourne
) HWS to a gas one, so he is no longer eligible for off peak rates. Two things you might want to look into:
1. Install a small solar electricity system. I know the buy back is the same rate as the buy in rate, but it does allow you to access the off peak rates (at least in Vic. Off peak in Vic is all weekend and after 11pm- 7am weekdays). The other "plus" is that you can get a 1.5kw system for less than $2 grand now (you will have to calculate the payback time of course).
2. Install a small electric HWS for the ensuite/bathroom/kitche. MAYBE this will allow you to access off peak rates. I dont know how much a small HWS would cost, plus the fee for installation, but if its around the $1500 mark, then the solar system might be more worthwhile.
HTH,
Bo