Upper South Island Loads

Power system loads in the South Island north of Waitaki Valley (Zone 3) are displayed on this page to give power companies loading information across the zone.

This information is updated every five minutes. Due to the location of recording equipment at some sites, the load split between retailers for these zones is indicative only.

The historical Zone Load Peaks are winter and summer seasonal values and are reset at the change of seasons on 20 October and 10 May.

The graph of the previous week’s USI load, VSAT load limit and USI Generation, has been removed. If this information is still required please contact system.operator@transpower.co.nz

Upper South Island Load Data
Zone 3 Real Time VSAT Limit1296.2 MW
Zone 3 Load914.51 MW
Zone 3 Margin381.69 MW
Zone 3 AUVLS enabledNo
Electricity Ashburton106 MW
Marlborough Lines48.7 MW
Buller Electricity8.3 MW
Network Tasman115.37 MW
Alpine Energy Ltd87.6 MW
Mainpower84.5 MW
Orion452.2 MW
Westpower25.24 MW
Top South Island Load Data
GZ 9 Real Time VSAT Limit341.3 MW
GZ 9 Load189.37 MW
GZ 9 Margin151.93 MW
GZ 9 AUVLS enabledNo
Marlborough Lines48.7 MW
Buller Electricity8.3 MW
Network Tasman115.37 MW

Latest Zone Load Graphs

Zone 3 Load (Upper South Island)


GZ 9 Load (Nelson)


Historical Zone Load Peaks

Top 10 now reflects Summer daily peaks.
Zone 3 LoadDate
1027.9820/10/2022 08:25
GZ9 LoadDate
212.5320/10/2022 08:20