Wholesale electricity market: week ending 21 Aug

The Marketplace Company Limited

Wholesale electricity market summary for the week ending 21 August 2005

14-Aug Sun / 15-Aug Mon / 16-Aug Tue / 17-Aug Wed / 18-Aug Thu / 19-Aug Fri / 20-Aug Sat / 21-Aug Sun

Daily Average Reference Price (c/kWh)

Otahuhu 6.63 8.40 7.68 6.83 7.39 7.35 6.72 6.43
Haywards 6.64 8.28 7.56 6.82 7.27 7.12 6.66 6.40
Benmore 6.57 8.08 7.40 6.69 6.99 6.87 6.55 6.27
Haywards 1 month ago 7.56 7.94 7.90 7.96 8.22 8.31 7.60 7.03
Haywards 1 year ago 1.06 3.05 6.63 3.49 2.92 2.84 29.31 1.71

M-co Electricity Price Index
(c/kWh)

New Zealand 7.53 7.62 7.61 7.46 7.32 7.29 7.27 7.23
New Zealand 1 month ago 7.66 7.54 7.58 7.69 7.78 7.94 7.96 7.89
New Zealand 1 year ago 1.75 1.97 2.76 2.96 3.11 3.33 3.98 4.05

NZ Demand (GWh)

Total 101.0 118.1 116.7 112.9 115.6 113.2 99.1 98.8
7 days ago 105.2 116.6 116.3 116.5 116.8 110.6 101.6 101.0
7 day change -4.0% 1.29% 0.35% -3.09% -1.08% 2.29% -2.44% -2.13%
Total 1 month ago 101.2 109.5 112.7 110.7 110.3 108.2 98.2 98.2
Total 1 year ago 102.8 122.0 126.6 125.0 120.1 117.4 106.3 102.2

NZ Generation Output (GWh)

NI Hydro 14.7 20.1 18.7 18.1 17.4 19.1 13.7 13.5
NI Other 48.3 52.8 54.9 53.5 53.3 49.0 47.3 46.7
SI Hydro 40.0 48.0 45.9 44.0 47.6 47.5 40.0 40.4
Total 103.0 121.0 119.5 115.6 118.3 115.6 100.9 100.6
NI Hydro 1 month ago 19.2 21.8 21.4 21.1 21.2 20.8 17.5 15.7
NI Other 1 month ago 47.6 52.2 53.3 53.3 53.8 54.1 51.3 50.1
SI Hydro 1 month ago 37.6 45.0 46.2 46.0 46.5 45.2 38.0 35.6
NI Hydro 1 year ago 30.8 34.2 34.0 33.8 32.8 32.2 32.0 29.9
NI Other 1 year ago 27.6 35.0 38.2 37.9 36.4 34.1 31.5 28.5
SI Hydro 1 year ago 46.3 55.8 57.5 56.4 53.5 53.6 45.0 45.8

Inter-Island Transmission
Transfers (GWh)

South to North 1.7 4.7 3.0 2.6 5.4 6.4 2.6 3.8
North to South 1.0 0.4 0.2 1.1 0.0 0.0 0.2 0.5
South to North 1 month ago 0.3 2.1 3.1 3.4 3.6 3.0 0.6 0.4
South to North 1 year ago 6.0 10.6 11.6 11.3 9.8 10.1 5.6 7.1

Hydrology (GWh)

Storage 1911 1892 1919 1937 1929 1918 1917 1926
% of average 80% 80% 81% 82% 82% 82% 82% 82%
Inflows (GWh/day) 67.7 50.7 64.9 96.4 63.3 54.4 51.7 56.3
% of average 114% 86% 110% 165% 108% 93% 89% 98%
Storage % of average 1 month
ago 84% 84% 84% 83% 82% 81% 81% 81%
Storage % of average 1 year ago 124% 123% 123% 122% 121% 120% 121% 122%

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.

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About M-co

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

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