Wholesale electricity market summary - 11 July

media fact sheet

Wholesale electricity market summary for the week ending

11 July 2004

Spot Market Daily Average Reference Point Prices 0.00 2.00 4.00 6.00 8.00 10.00 13 Apr 28 Apr 13 May 28 May 12 Jun 27 Jun

Price (c/kWh) Otahuhu Hayw ards Benmore 4-Jul 5-Jul 6-Jul 7-Jul 8-Jul 9-Jul 10-Jul 11-Jul Sun Mon Tue Wed Thu Fri Sat Sun

Daily Average Reference Price (c/kWh) Otahuhu 0.90 2.34 1.46 1.38 1.43 3.23 5.32 2.47 Haywards 0.82 2.12 1.33 1.27 1.33 2.95 4.81 2.24 Benmore 0.22 1.47 1.13 0.90 0.90 1.06 1.54 1.85

M-co Electricity Price Index (c/kWh) New Zealand 2.78 2.93 2.05 1.88 1.85 1.55 2.01 2.21 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 Marketplace Company Limited Level 2, Wool House, 10 Brandon Street, PO Box 5422 Wellington, New Zealand Telephone +64-4-473 5240 Facsimile +64-4-473 5247 Home Page http://www.m-co.co.nz Email info@m-co.co.nz page 1 of 2

4-Jul 5-Jul 6-Jul 7-Jul 8-Jul 9-Jul 10-Jul 11-Jul Sun Mon Tue Wed Thu Fri Sat Sun

NZ Demand (GWh) Total 103.0 118.4 115.2 115.6 117.2 118.7 106.8 103.3 7 days ago 100.6 110.5 115.8 116.3 114.9 115.2 104.5 103.0 14 days ago 96.7 110.6 115.6 117.8 117.7 112.6 99.8 100.6 7 Day Change 2.3% 7.1% -0.6% -0.6% 2.0% 3.1% 2.2% 0.3% 14 Day Change 6.5% 7.0% -0.4% -1.8% -0.4% 5.5% 7.0% 2.6%

NZ Generation Output (GWh) NI Hydro 29.0 32.0 31.0 30.5 31.1 31.9 29.2 25 NI Other 23.5 31.5 31.0 31.2 30.8 32.3 25.6 25 SI Hydro 53.0 57.6 55.9 56.6 57.8 57.6 54.7 54 Total 105.5 121.1 117.8 118.3 119.8 121.8 109.5 105.9

Inter-Island Transmission Transfers (GWh) South to North 14.2 13.4 12.5 13.4 14.1 14.5 14.7 14 North to South 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Hydrology (GWh) Storage 3779 3746 3742 3725 3692 3656 3625 3589 % of average 146% 145% 145% 145% 144% 143% 143% 142% Inflows (GWh/day) 58 56 71 83 68 56 54 59 % of average 102% 98% 126% 147% 121% 100% 96% 106% .9 .8 .1 .6

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