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Commercial time of use power tariffs

Gazetted Power Tariff (including GST)

See Also:

• Commercial TOU Application form

Avoid the Power Peak and Save Money

• Commercial T.O.U. Tariffs
• Application Form

Some commercial and government customers use most of their power outside the high demand period of 6am to 6pm, Monday to Friday. The Time-of-Use Tariff rewards customers who are able to shift their power usage to the non-peak period.

This distributes the timing of demand on Power and Water's generating and transmission equipment, saving Power and Water and its customers millions of dollars in future investment. It also reduces greenhouse gas emissions as it allows Power and Water to operate a highly efficient plant, 24 hours a day, rather than having many plants which only operate during peak hours.

You will save on your electricity bill where more than 50% of your total power consumption is used during the off-peak period.

Commercial time-of-use tariffs

effective from 1 July 2008
Charge	Cents	Time
Off-Peak	13.01 per kWh	1800 hours to 0600 hours, 7 days a week
Peak	23.11 per kWh	0600 hours to 1800 hours, 7 days a week
Access	47.78 per day	Fixed daily charge
Power Service Charges Some electricity services attract extra charges. These include:		Charges
Connection		$56
Reconnection after non-payment		$61
Reconnection after non-payment after hours		$78
Special meter reading fees (at the customers request)		$45

Once electing to be charged at a General Purpose Time of Use Tariff, you will be charged for a period of not less than 12 months.

Full details of these charges and detailed tariff options are available at any Customer Service Centre.

Calculate your total business power consumption

The Time of Use (TOU) tariff is designed to encourage large consumers of electricity to use more during the off-peak period than the peak period. The off-peak period is during the night, when our generating system has capacity that is not being used. Therefore, the unit cost of electricity during this period is cheaper.

The TOU charge consists of two time periods, peak and off-peak. The peak period is between 0600 hours and 1800 hours, and the off-peak period is between 1800 hours and 0600 hours.

Refer to the figure below.

Off -Peak							Peak Period												Off - Peak
0.00		1.00		3.00		5.00		7.00		9.00		11.00		13.00		15.00		17.00		19.00		21.00		23.00
Time of day

The details of the Time of Use tariff are shown in the table below.

Charge	Cents	Time
Off-Peak	13.01 per kWh	1800 hours to 0600 hours, 7 days a week
Peak	23.11 per kWh	0600 hours to 1800 hours
Access	47.78 per day	Fixed daily charge.

Once electing to be charged at a General Purpose Time of Use Tariff, the applicant shall be charged for a period of not less than 12 months.

A customer will save on their electricity bill where more than 50% of the total consumption is used during the off-peak period.

Commercial Time Of Use Tariff

The following is a guide to enable a consumer to determine if they use more than 50% of their total daily consumption during the off-peak period.

1.	To determine your total consumption for 24 hours: The meters should be read at the same time each day. i.e. start read at 0600 hours and end read at 0600 hours. For a consumer with 3 meters:
			Meter 1	Meter 2	Meter 3
	Start at 0600		6218	7286	7651
	Finish at 0600		6369	7457	7811
	Total consumption		151	171	160
	Total of the 3 meters = 482
2.	Determine the consumption for the Off Peak period:
	e.g. Off-peak time:	1800 ON
		0600 OFF
			Meter 1	Meter 2	Meter 3
	Start at 1800		6218	7286	7651
	Finish at 0600		6319	7400	7759
	Total consumption		101	114	108
	Total Off Peak Consumption = 323
3.	Determine the off-peak percentage of the total consumption:
	Off-peak Units used x 100	= % off-peak	323 x 100 = 67.0%
	Total Unit used	=	482
	It would be to the consumer’s advantage to be using the Time of Use Tariff.
4.	Calculating the savings using the TOU Tariff. Cost (TOU Tariff) = (Unit used during peak period) x 0.2311 + (Units used during the off-peak period) x 0.1301+ 0.4778 = (482 - 323) x 0.2311 + 323 x 0.1301+ 0.4778 = $79.24 Cost (Standard Commercial Tariff) = (Unit used during total period) x 0.1805 + 0.4778 = 482 x 0.1805 + 0.4778 = $87.48 The example is provided as an approximate guide only. To obtain a more accurate indication, this process should be repeated over a week, including the weekend, so that the average can be obtained.

Time of use calculation sheet

Total Consumption
		Meter 1	Meter 2	Meter 3
Start Day 1, 0600 (A)
Finish Day 2, 0600 (B)
Units Used (B – A)		(C)	(D)	(E)
Total of the 3 meters (C + D + E)		(F)
Off Peak Consumption
		Meter 1	Meter 2	Meter 3
Start of Off Peak (G)
Finish of Off Peak (H)
Units used during off peak (G – H)		(I)	(J)	(K)
Total of the 3 meters (I + J + K)		(L)
Percentage Of Total Consumption
(L)	x 100 =	%
(F)
Charge Calculation
Time of use Tariff
Charge		Cents Per Unit Price	Units Used	Total Cost (Per Unit Price x Units Used)
Off-Peak		.1301	(L)
Peak		.2311	(F – L)
Access		.4778	1	$0.4778
			Total (TOU)	(M)
Standard Commercial Tariff
Charge		Cents Per Unit Price	Units Used	Total Cost (Per Unit Price x Units Used)
Off-Peak		.1805	(F)
Access		.4778	1	$0.4778
			Total (Standard)	(N)
Percentage Savings
(N - M)	x 100 =	%
(N)

See Also:

• Commercial TOU Application form