I’ve posted this to justify paying an expensive rate for peak electricity with my retailer TRU Energy.
The other advantage I have is; I have my Electricity and Gas with the same retailer so I can ring up and request that my electricity credit be put onto my gas bill. (Plus I get a discount on my Gas bill by having both accounts with the same retailer).
Now I am on a Time of use tariff (TOU):
1 week = 7 days of 24 hours = 168 hours. With my standard time of use tariffs the times are peak at 7am – 11pm week days and all other times are off peak.
So to break it down into long numbers:
PEAK TIME =
Mon: 7am – 11pm = 16 hours
Tue: 7am – 11pm = 16 hours
Wed = 7am – 11pm = 16 hours
Thu = 7am – 11pm = 16 hours
Fri = 7am – 11pm = 16 hours
5 days X 16 hours = 80 hours (need to find another 88 hours for a week)
OFF PEAK TIME =
Mon: 11pm – Tue 7am = 8hours
Tue: 11pm – Wed 7am = 8 hours
Wed: 11pm – Thu 7am = 8 hours
Thu: 11pm – Fri 7am = 8 hours
Fri: 11pm – Mon 7am = 56 hours
OFF PEAK = (4 X 8 ) = 32 + (1 X 56) = 88 hours
PEAK: 80 hours + OFF PEAK 88 hours = 168 hours = 1 week
As long as I keep my consumption below 333kWh / month, I pay the lower Peak rate. >333kWh / month is normal for me.
I pay a massive 29.7110c/kWh peak
I pay a massive 10.8400c/kWh off peak
If I were to consume 1kWh every hour for a week it would work out to be:
PEAK: 1kWh X 80 hours X 29.7110c/kWh = $23.7688
OFF PEAK: 1kWh X 88 hours X 10.8400c/kWh = $9.5392
Total for the week = $33.308
So the $33.308 / 168 hours will give me my average cost per kWh.
$0.198262 / kWh (or 19.8262c / kWh)
During Summer time, my solar system will offset a lot of the 7am – 7pm consumption and leave me to pay for the 7pm – 11pm period, sort of makes me glad I don’t have to pay for a more expensive shoulder period that would be hard for me to minimise or offset.