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 Limit1260.8 MW
Zone 3 Load692.8 MW
Zone 3 Margin568 MW
Zone 3 AUVLS enabledNo
Electricity Ashburton74.4 MW
Marlborough Lines35.5 MW
Buller Electricity5.9 MW
Network Tasman84.7 MW
Alpine Energy Ltd80.3 MW
Mainpower70.6 MW
Orion341.48 MW
Westpower11.22 MW
Top South Island Load Data
GZ 9 Real Time VSAT Limit389 MW
GZ 9 Load140.8 MW
GZ 9 Margin248.2 MW
GZ 9 AUVLS enabledNo
Marlborough Lines35.5 MW
Buller Electricity5.9 MW
Network Tasman84.7 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
970.4220/10/2021 08:15
969.7321/10/2021 07:55
910.1422/10/2021 08:00
771.8823/10/2021 09:20
735.9124/10/2021 09:30
731.8825/10/2021 09:50
GZ9 LoadDate
202.3821/10/2021 08:20
193.8720/10/2021 08:10
192.4222/10/2021 08:10
163.9123/10/2021 08:20
155.5824/10/2021 09:25
152.6525/10/2021 09:40