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Wholesale electricity market summary

The Marketplace Company Limited


Wholesale electricity market summary for the week ending
28 August 2005

21-Aug Sun / 22-Aug Mon / 23-Aug Tue / 24-Aug Wed / 25-Aug Thu / 26-Aug Fri / 27-Aug Sat / 28-Aug Sun

Daily Average Reference Price (c/kWh)

Otahuhu 6.43 7.18 7.01 6.91 6.79 6.78 7.55 6.67
Haywards 6.40 7.07 6.98 6.83 6.77 6.77 7.55 6.82
Benmore 6.27 6.87 6.84 6.61 6.60 6.60 7.34 6.68
Haywards 1 month ago 7.03 7.74 8.18 7.49 7.86 7.88 7.91 7.58
Haywards 1 year ago 1.71 2.20 4.74 5.17 7.55 4.43 3.91 4.05

M-co Electricity Price Index (c/kWh)

New Zealand 7.23 7.02 6.92 6.92 6.84 6.77 6.89 6.93
New Zealand 1 month ago 7.89 7.87 7.91 7.83 7.78 7.69 7.72 7.79
New Zealand 1 year ago 4.05 3.90 3.47 3.71 4.38 4.62 4.31 4.60

NZ Demand (GWh)

Total 98.8 111.9 113.4 114.2 114.3 112.1 104.4 101.0
7 days ago 101.0 118.1 116.7 112.9 115.6 113.2 99.1 98.8
7 day change -2.1% -5.29% -2.86% 1.11% -1.13% -0.98% 5.38% 2.25%
Total 1 month ago 98.3 109.5 112.7 110.7 110.3 108.2 98.2 98.2
Total 1 year ago 102.2 117.8 123.7 124.0 124.4 123.9 113.4 110.4

NZ Generation Output (GWh)

NI Hydro 13.5 17.0 18.3 17.4 18.4 18.2 14.9 12.8
NI Other 46.7 51.2 52.1 51.6 51.6 50.7 47.1 48.0
SI Hydro 40.4 46.0 45.4 47.5 46.7 45.4 44.3 42.1
Total 100.6 114.2 115.7 116.6 116.7 114.3 106.3 102.9
NI Hydro 1 month ago 15.7 21.8 21.2 19.3 21.0 20.4 16.6 17.1
NI Other 1 month ago 50.1 52.6 53.9 52.7 53.5 52.9 51.9 50.6
SI Hydro 1 month ago 35.6 42.7 42.7 42.1 44.4 43.9 39.6 37.8
NI Hydro 1 year ago 29.9 31.0 31.9 31.9 30.5 27.5 24.6 24.6
NI Other 1 year ago 28.5 35.3 37.8 38.6 40.1 41.5 37.6 36.0
SI Hydro 1 year ago 45.8 54.1 57.0 56.6 56.8 57.7 53.6 52.1

Inter-Island Transmission Transfers (GWh)

South to North 3.8 5.3 4.3 6.6 4.3 4.5 4.9 3.3
North to South 0.5 0.4 0.5 0.0 0.0 0.5 0.0 0.2
South to North 1 month ago 0.4 2.2 2.8 1.2 2.3 2.1 0.9 0.9
South to North 1 year ago 7.1 9.9 11.2 11.3 10.9 11.7 10.6 10.9

Hydrology (GWh)

Storage 1927 1926 1936 1949 1943 1932 1919 1906
% of average 82% 83% 83% 84% 84% 84% 84% 83%
Inflows (GWh/day) 65.0 62.0 73.4 91.7 73.0 55.3 47.4 45.9
% of average 113% 108% 128% 160% 127% 97% 83% 80%
Storage % of average 1 month
ago 81% 82% 82% 85% 85% 85% 85% 84%
Storage % of average 1 year ago 122% 122% 121% 120% 118% 117% 115% 114%

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.

About M-co

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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