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Wholesale electricity market summary -26 September

26 September 2004

Wholesale electricity market summary for the week ending

Spot Market Daily Average Reference Point Prices
0.00
2.00
4.00
6.00
8.00
10.00
29 Jun 14 Jul 29 Jul 13 Aug 28 Aug 12 Sep
Price (c/kWh)

Otahuhu Haywards Benmore

19-Sep 20-Sep 21-Sep 22-Sep 23-Sep 24-Sep 25-Sep 26-Sep

Sun Mon Tue Wed Thu Fri Sat Sun

Daily Average Reference Price (c/kWh)
Otahuhu 2.93 2.87 2.81 2.68 3.74 3.51 4.02 4.02
Haywards 2.68 2.57 2.67 2.37 3.31 3.04 3.54 3.54
Benmore 2.49 2.36 2.44 2.13 2.97 2.58 3.07 3.07
Haywards 1 month ago 1.71 2.20 4.74 5.17 7.55 4.43 3.91 4.05
Haywards 1 year ago 4.13 4.37 4.04 3.68 3.54 3.23 3.26 3.82

M-co Electricity Price Index (c/kWh)

New Zealand 2.46 2.42 2.47 2.50 2.70 2.84 2.99 3.04
New Zealand 1 month ago 4.05 3.90 3.47 3.71 4.38 4.62 4.31 4.60
New Zealand 1 year ago 4.52 4.43 4.28 4.11 3.96 3.85 3.74 3.74

19-Sep 20-Sep 21-Sep 22-Sep 23-Sep 24-Sep 25-Sep 26-Sep
Sun Mon Tue Wed Thu Fri Sat Sun

NZ Demand (GWh)
Total 99.7 110.5 110.3 110.5 114.0 109.5 101.1 97.0
7 days ago 95.4 110.9 110.9 111.2 110.6 108.4 99.3 99.7
7 day change 4.4% -0.4% -0.6% -0.7% 3.0% 1.0% 1.8% -2.7%
Total 1 month ago 102.2 117.8 123.7 124.0 124.4 123.9 113.4 110.4
Total 1 year ago 90.3 101.8 103.3 102.2 101.1 100.1 90.9 93.4

NZ Generation Output (GWh)

NI Hydro 21.9 23.4 22.0 22.4 21.9 18.4 17.7 18.3
NI Other 28.7 33.7 35.6 33.6 35.0 34.3 31.3 28.9
SI Hydro 51.2 56.1 55.3 57.4 60.1 60.2 54.7 52.1
Total 101.8 113.2 112.9 113.3 117.0 112.9 103.8 99.2
NI Hydro 1 month ago 29.9 31.0 31.9 31.9 30.5 27.5 24.6 24.6
NI Other 1 month ago 28.5 35.3 37.8 38.6 40.1 41.5 37.6 36.0
SI Hydro 1 month ago 45.8 54.1 57.0 56.6 56.8 57.7 53.6 52.1
NI Hydro 1 year ago 19.0 21.4 21.2 18.8 18.2 18.0 18.2 20.3
NI Other 1 year ago 33.3 38.5 39.3 38.9 38.5 34.6 27.9 27.1
SI Hydro 1 year ago 39.4 43.7 44.7 46.2 46.3 49.7 46.5 47.6

Inter-Island Transmission Transfers (GWh)
South to North 13.0 15.4 15.6 16.8 18.3 19.8 18.2 16.6
North to South 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
South to North 1 month ago 7.1 9.9 11.2 11.3 10.9 11.7 10.6 10.9
South to North 1 year ago 5.2 5.9 6.4 8.7 9.6 13.6 12.6 10.8
Hydrology (GWh)

Storage 2326 2297 2274 2238 2213 2199 2189 2183
% of average 106% 104% 103% 101% 100% 100% 99% 99%
Inflows (GWh/day) 61 53 52 51 52 67 63 57
% of average 89% 77% 75% 73% 74% 95% 89% 80%
Storage % of average 1 month ago 104% 103% 102% 100% 99% 98% 98% 97%
Storage % of average 1 year ago 89% 88% 87% 85% 84% 83% 83% 82%

The M-co Electricity Price Index is a demand weighted seven-day rolling average that smoothes out price
volatility distortions. The wholesale electricity price differs from the retail electricity price, which is the price
domestic consumers see on their electricity bill. The wholesale price is only one of the factors that influence
retail prices.
For more information
Visit www.comitfree.co.nz or contact:

M-co is a contracted provider of administration, pricing, clearing and information system services
to the Electricity Commission.

The above information has been prepared for the purposes of media release only. All due care has been taken in the production of this
information; however, M-co accepts no responsibility or liability for the accuracy of the information contained in this media release.

ENDS

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