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 31 May 2026
Energy Totals GWh Previous Week
| Generation GWh |
Supply GWh |
Max Daily Energy GWh |
|
|---|---|---|---|
| North Island | 466.00 | 519.20 | 77.20 Tue 26/05/26 |
| South Island | 371.50 | 316.20 | 47.10 Thu 28/05/26 |
| New Zealand | 837.50 | 835.40 | 124.30 Tue 26/05/26 |
| Net HVDC Transfer | 55.3 North |
Energy Totals GWh Year to Date
| Generation GWh |
Supply GWh |
Max Daily Energy GWh |
|
|---|---|---|---|
| North Island | 9428.40 | 10253.40 | 78.00 Fri 24/04/26 |
| South Island | 7269.00 | 6404.60 | 48.30 Wed 20/05/26 |
| New Zealand | 16697.40 | 16658.00 | 125.40 Wed 20/05/26 |
| Net HVDC Transfer | 864.4 North |
Peak Half Hour Supply (Average MW)
| Previous Week MW |
Year to Date MW |
|
|---|---|---|
| North Island | 4076.70 Tue 26/05/26 18:00 | 4100.40 Mon 18/05/26 18:00 |
| South Island | 2409.00 Fri 29/05/26 08:00 | 2435.20 Wed 04/03/26 03:30 |
| New Zealand | 6417.60 Wed 27/05/26 08:00 | 6498.50 Wed 20/05/26 07:30 |