Power (assuming no solar, AUD $0.432c/kW):

Estimated CostHourskWW (estimate)
$0.721051.6kW15.87
$0.791171.8kW15.62
$0.971442.2kW15.59
$1.181762.7kW15.51
$1.271892.9kW15.55
$1.522263.5kW15.56
$1.682483.9kW15.68
$1.782644.1kW15.60
$1.91283*4.4kW15.62
$2.073074.8kW15.60
$2.233345.2kW15.45
$2.553825.9kW15.45
$2.734106.3kW15.41
$2.874316.6kW15.41
$3.064577.1kW15.49
$3.365037.8kW15.46
$3.555318.2kW15.47
$3.705548.6kW15.45
$3.83574[~9m]8.9kW15.44
$4.03612[~30m]9.5kW15.24
$4.17627h+43m9.6kW15.37
$4.33648h+27m10.0kW15.45
$4.56682h+36m10.6kW15.46
$4.70702h+36m10.9kW15.49
$4.88729h+18m11.3kW15.48
$5.08756h+09m11.8kW15.55
$5.54827h+09m12.9kW15.50
$5.82871h+09m13.5kW15.46
$6.01902h+12m13.9kW15.42
$6.26941h+46m14.5kW15.38
$6.38961h+11m14.8kW15.36
$6.721015h+50m15.6kW15.31
$6.821031h+22m15.8kW15.30
$7.131076h+40m16.5kW15.32
$7.311104h+0m17.0kW15.32

* Perfect to the minute, because I waited 1 min, numbers didn't change between that minute either. Note that minutes are ignored, and kilowatts may be rounded down by the meter.
~ is approximate, while + minutes are used in calculations. Note that solar power is available sometimes, almost halving the true cost.