This is a summary of energy for the previous week, ending Sunday at midnight.
The data is uploaded every Monday at 9.15am.
Week Ending Sunday 04 Jan 2026
Energy Totals GWh Previous Week
| Generation GWh |
Supply GWh |
Max Daily Energy GWh |
|
|---|---|---|---|
| North Island | 358.30 | 395.70 | 61.10 Tue 30/12/25 |
| South Island | 315.40 | 276.60 | 43.60 Sun 04/01/26 |
| New Zealand | 673.70 | 672.30 | 102.20 Tue 30/12/25 |
| Net HVDC Transfer | 38.8 North |
Energy Totals GWh Year to Date
| Generation GWh |
Supply GWh |
Max Daily Energy GWh |
|
|---|---|---|---|
| North Island | 199.80 | 214.50 | 61.10 Tue 30/12/25 |
| South Island | 171.20 | 155.90 | 43.60 Sun 04/01/26 |
| New Zealand | 371.00 | 370.40 | 102.20 Tue 30/12/25 |
| Net HVDC Transfer | 15.3 North |
Peak Half Hour Supply (Average MW)
| Previous Week MW |
Year to Date MW |
|
|---|---|---|
| North Island | 2966.90 Mon 29/12/25 17:30 | 4890.20 Tue 19/08/25 18:00 |
| South Island | 2201.10 Sun 04/01/26 21:00 | 2438.00 Wed 13/08/25 07:30 |
| New Zealand | 4804.30 Tue 30/12/25 17:30 | 7303.00 Fri 25/07/25 08:00 |