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  • When does GoodGrid CPD happen? 
    Each summer, between 01 December and 31 March the following year, AusNet Services nominates five critical peak demand (CPD) days that coincide with extreme temperatures or consecutive days of hot weather. If your business can reduce its demand for electricity from the grid during the CPD window (3 pm - 7 pm AEDT) on a nominated CPD day, you can minimise your CPD charge. 
  • How does GoodGrid CPD work? 
    In this example, the hypothetical CPD charge is $5 per kVA per month. Business customers ‘A’ and ‘B’ each have an average maximum demand of 500 kVA between 3 pm and 7 pm in summer. 

    Customer A signs up to the GoodGrid CPD program. Customer A is notified about upcoming CPD days and decides to switch part of her load to a generator during each CPD window.  By using a generator, Customer A reduces her peak demand from the grid during each CPD window from 500 kVA to 300 kVA. 

    Customer B does not change his consumption behaviour.  Customer B’s peak demand during each CPD window remains 500 kVA. 

    After the GoodGrid CPD Program ends, AusNet Services recalculates Customer A’s average peak energy demand. For the next 12 months, Customer A’s CPD charge is now calculated using an average peak demand of 300 kVA. Her CPD cCase harge will be $5 x 300 kVA = $1,500. This CPD charge will be one component of her total network charge.

    The network component of Customer A’s electricity bill is now $1,000 lower than it would have been if she had not actively reduced her peak demand during the CPD windows.
    However, because Customer B’s average peak demand remains the same, his CPD charge remains unchanged.  His charge will be $5 x 500 kVA = $2,500. 
  • What is a CPD charge?

    The CPD charge is a monthly charge included on your electricity bill.  The CPD charge is calculated by multiplying a fixed price (the CPD price) by the average of your peak electricity demand during the CPD window on each of the five nominated CPD days. Your average peak electricity demand is measured in kilovolt-ampere (kVA).  The example below shows how we calculate your CPD charge.

    We recalculate the average peak electricity demand component of your CPD charge annually.  By lowering your peak demand during each CPD window, you are likely to reduce your average peak electricity demand, and therefore reduce the amount of CPD charge you must pay each month for the next 12 months. 
  • Will I see the reduction on my bill? 
    The CPD charge forms a part of the total network charge shown on the bill issued by your retailer. If your business participates in the GoodGrid CPD Program, you will not see an explicit reference to the reduction in your CPD charge. However, your CPD charge will be lower than it otherwise would have been if you do not participate. 
  • How can my business reduce its electricity demand?
    Your business can lower its demand for electricity in several different ways.  For example, you could:

    • switch to an alternate electricity supply such as a generator or battery storage
    • shift your consumption pattern so that you consume more electricity outside the CPD window
    • scale back or shut down production during the CPD window.
  • Who can participate?

    If your business uses more than 160 MWh of electricity per year and you are assigned to a CPD tariff, you are already part of the program.

    The annual CPD tariffs are:

    NSP56, NSP75, NSP76, NSP77, NSP78, NSP81, NSP82, NSP83, NSP91, NSP94, NSP95

    Almost all our large business customers are already on a CPD tariff, but to confirm, please contact us on 1300 451 331.