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Wholesale electricity market summary to 18 Sept

Wholesale electricity market summary for the week ending
18 September 2005

11-Sep 12-Sep 13-Sep 14-Sep 15-Sep 16-Sep 17-Sep 18-Sep

Daily Average Reference Price (c/kWh)

Otahuhu 6.63 6.57 7.41 7.10 7.54 7.50 5.42 5.81
Haywards 6.67 6.50 7.36 7.02 7.52 7.35 5.62 6.12
Benmore 6.48 6.26 7.13 6.78 7.32 7.13 5.64 6.11
Haywards 1 month ago 6.64 8.28 7.56 6.82 7.27 7.12 6.66 6.40
Haywards 1 year ago 2.71 2.76 2.22 2.11 2.02 2.13 2.42 2.68

M-co Electricity Price Index (c/kWh)

New Zealand 7.32 7.22 7.22 7.32 7.34 7.32 7.13 7.06
New Zealand 1 month ago 7.53 7.62 7.61 7.46 7.32 7.29 7.27 7.23
New Zealand 1 year ago 3.08 3.01 2.86 2.75 2.62 2.50 2.45 2.46

NZ Demand (GWh)

Total 98.6 109.3 109.4 109.4 107.6 105.8 96.2 98.9
7 days ago 97.4 109.9 111.3 109.5 113.4 110.9 100.7 98.6
7 day change 1.3% -0.48% -1.73% -0.08% -5.09% -4.62% -4.54% 0.30%
Total 1 month ago 101.0 109.5 112.7 110.7 110.3 108.2 98.2 98.2
Total 1 year ago 95.4 110.9 110.9 111.2 110.6 108.4 99.3 99.7

NZ Generation Output (GWh)

NI Hydro 10.6 14.6 14.2 14.0 13.8 13.3 15.5 19.5
NI Other 46.9 48.9 49.6 50.3 50.1 48.8 45.5 43.3
SI Hydro 43.0 48.3 48.2 47.8 46.2 46.0 37.2 38.2
Total 100.5 111.8 112.0 112.1 110.2 108.1 98.1 101.0
NI Hydro 1 month ago 14.7 20.1 18.7 18.1 17.4 19.1 13.7 13.5
NI Other 1 month ago 48.3 52.8 54.9 53.5 53.3 49.0 47.3 46.7
SI Hydro 1 month ago 40.0 48.0 45.9 44.0 47.6 47.5 40.0 40.4
NI Hydro 1 year ago 18.4 23.2 23.4 23.9 22.9 24.1 21.4 21.9
NI Other 1 year ago 32.9 37.5 37.1 36.3 36.5 33.0 28.6 28.7
SI Hydro 1 year ago 46.0 52.6 52.6 53.4 53.6 53.8 51.5 51.2

Inter-Island Transmission Transfers (GWh)

South to North 5.6 6.9 5.7 6.0 5.0 5.9 0.7 0.9
North to South 0.0 0.0 0.0 0.1 0.5 0.4 2.2 2.4
South to North 1 month ago 1.7 4.7 3.0 2.6 5.4 6.4 2.6 3.8
South to North 1 year ago 10.2 12.6 12.0 12.6 12.2 12.8 13.3 13.0

Hydrology (GWh)

Storage 2138 2128 2115 2104 2093 2087 2087 2115
% of average 95% 95% 94% 94% 93% 93% 93% 94%
Inflows (GWh/day) 62.7 55.9 53.4 52.9 53.9 53.7 59.4 75.3
% of average 95% 84% 80% 78% 79% 79% 87% 109%
Storage % of average 1 month ago 80% 80% 81% 82% 82% 82% 82% 82%
Storage % of average 1 year ago 107% 108% 107% 106% 107% 107% 107% 106%

About M-co

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

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.

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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