New Zealand Electricity: Generation Mix, Demand and Emissions
New Zealand generated 44.0 TWh of electricity in 2025, according to Ember. Hydro was the largest source at 54.0%, followed by other renewables (22.2%) and wind (9.6%). Demand was 44.0 TWh and each kWh generated emitted 97 gCO2/kWh. These are annual statistics for 2025, with monthly figures through September 2026; they are compiled from national sources and are not real time.
Key Facts
- New Zealand generated 44.0 TWh of electricity in 2025.
- Hydro supplied 54.0% of New Zealand's electricity in 2025.
- Other renewables supplied 22.2% of New Zealand's electricity in 2025.
- Wind supplied 9.6% of New Zealand's electricity in 2025.
- Low carbon sources (nuclear and renewables) supplied 88.2% of New Zealand's generation in 2025.
- The carbon intensity of New Zealand's electricity was 97 gCO2/kWh in 2025.
- New Zealand's carbon intensity in 2025 was 48% lower than in 2000, when it was 185 gCO2/kWh.
- New Zealand had the 56th highest electricity demand among the 96 countries with Ember data for 2025.
Key Figures, 2025
| Measure | Value | As of / source |
|---|---|---|
| Total generation | 44.0 TWh | 2025 · Ember |
| Electricity demand | 44.0 TWh | 2025 · Ember |
| Demand per person | 8.25 MWh | 2025 · Ember |
| Net imports | 0 TWh | 2025 · Ember |
| Carbon intensity | 97 gCO2/kWh | 2025 · Ember |
| Power sector emissions | 4.25 MtCO2 | 2025 · Ember |
| Demand rank (countries with 2025 data) | 56 of 96 | 2025 · Ember |
Generation Mix, 2025
| Source | Generation | Share |
|---|---|---|
| Hydro | 23.8 TWh | 54.0% |
| Other renewables | 9.76 TWh | 22.2% |
| Wind | 4.20 TWh | 9.6% |
| Gas | 3.82 TWh | 8.7% |
| Coal | 750 GWh | 1.7% |
| Other fossil | 640 GWh | 1.5% |
| Bioenergy | 560 GWh | 1.3% |
| Solar | 490 GWh | 1.1% |
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Year by Year
Ember annual statistics, 2000 to 2025| Year | Hydro | Other renewables | Wind | Gas | Coal |
|---|---|---|---|---|---|
| 2000 | 24.2 TWh | 2.76 TWh | 120 GWh | 9.45 TWh | 1.00 TWh |
| 2001 | 21.5 TWh | 2.68 TWh | 140 GWh | 12.2 TWh | 1.53 TWh |
| 2002 | 24.6 TWh | 2.65 TWh | 150 GWh | 10.2 TWh | 1.50 TWh |
| 2003 | 23.4 TWh | 2.59 TWh | 150 GWh | 9.71 TWh | 3.29 TWh |
| 2004 | 27.0 TWh | 2.63 TWh | 360 GWh | 6.86 TWh | 4.13 TWh |
| 2005 | 23.1 TWh | 2.98 TWh | 610 GWh | 9.26 TWh | 5.25 TWh |
| 2006 | 23.3 TWh | 3.18 TWh | 620 GWh | 9.61 TWh | 4.89 TWh |
| 2007 | 23.4 TWh | 3.35 TWh | 920 GWh | 11.8 TWh | 2.55 TWh |
| 2008 | 22.1 TWh | 3.97 TWh | 1.05 TWh | 10.6 TWh | 4.24 TWh |
| 2009 | 24.0 TWh | 4.59 TWh | 1.46 TWh | 8.86 TWh | 2.73 TWh |
| 2010 | 24.5 TWh | 5.53 TWh | 1.62 TWh | 9.84 TWh | 1.42 TWh |
| 2011 | 24.9 TWh | 5.77 TWh | 1.94 TWh | 8.35 TWh | 1.61 TWh |
| 2012 | 22.7 TWh | 5.85 TWh | 2.06 TWh | 8.81 TWh | 2.94 TWh |
| 2013 | 22.8 TWh | 6.07 TWh | 2.00 TWh | 8.63 TWh | 1.75 TWh |
| 2014 | 24.1 TWh | 6.87 TWh | 2.19 TWh | 7.00 TWh | 1.34 TWh |
| 2015 | 24.3 TWh | 7.41 TWh | 2.34 TWh | 6.80 TWh | 1.23 TWh |
| 2016 | 25.7 TWh | 7.54 TWh | 2.32 TWh | 5.71 TWh | 440 GWh |
| 2017 | 24.9 TWh | 7.58 TWh | 2.07 TWh | 6.98 TWh | 580 GWh |
| 2018 | 26.0 TWh | 7.52 TWh | 2.05 TWh | 5.66 TWh | 980 GWh |
| 2019 | 25.3 TWh | 7.59 TWh | 2.23 TWh | 5.42 TWh | 1.59 TWh |
| 2020 | 24.0 TWh | 7.83 TWh | 2.28 TWh | 5.94 TWh | 1.70 TWh |
| 2021 | 24.0 TWh | 7.97 TWh | 2.62 TWh | 4.65 TWh | 2.60 TWh |
| 2022 | 25.9 TWh | 7.82 TWh | 2.89 TWh | 4.31 TWh | 720 GWh |
| 2023 | 26.2 TWh | 7.73 TWh | 3.51 TWh | 3.36 TWh | 530 GWh |
| 2024 | 23.5 TWh | 8.93 TWh | 4.31 TWh | 4.31 TWh | 1.20 TWh |
| 2025 | 23.8 TWh | 9.76 TWh | 4.20 TWh | 3.82 TWh | 750 GWh |
| Year | Generation | Demand | Carbon intensity |
|---|---|---|---|
| 2025 | 44.0 TWh | 44.0 TWh | 97 gCO2/kWh |
| 2024 | 44.0 TWh | 44.0 TWh | 112 gCO2/kWh |
| 2023 | 42.9 TWh | 42.9 TWh | 87 gCO2/kWh |
| 2022 | 43.3 TWh | 43.3 TWh | 103 gCO2/kWh |
| 2021 | 43.6 TWh | 43.6 TWh | 145 gCO2/kWh |
| 2020 | 43.4 TWh | 43.4 TWh | 142 gCO2/kWh |
| 2019 | 43.8 TWh | 43.8 TWh | 133 gCO2/kWh |
| 2018 | 43.7 TWh | 43.7 TWh | 124 gCO2/kWh |
| 2017 | 43.7 TWh | 43.7 TWh | 132 gCO2/kWh |
| 2016 | 43.2 TWh | 43.2 TWh | 115 gCO2/kWh |
Full year by year history for New Zealand, 2000 to 2025
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025.
Month by Month
Ember monthly statistics through September 2026| Month | Demand | Generation |
|---|---|---|
| 2024-10 | 3.28 TWh | 3.28 TWh |
| 2024-11 | 3.18 TWh | 3.18 TWh |
| 2024-12 | 3.21 TWh | 3.21 TWh |
| 2025-01 | 3.15 TWh | 3.13 TWh |
| 2025-02 | 3.02 TWh | 3.03 TWh |
| 2025-03 | 3.25 TWh | 3.25 TWh |
| 2025-04 | 3.16 TWh | 3.17 TWh |
| 2025-05 | 3.51 TWh | 3.51 TWh |
| 2025-06 | 3.56 TWh | 3.58 TWh |
| 2025-07 | 3.84 TWh | 3.83 TWh |
| 2025-08 | 3.91 TWh | 3.91 TWh |
| 2025-09 | 3.53 TWh | 3.54 TWh |
| 2025-10 | 3.45 TWh | 3.45 TWh |
| 2025-11 | 3.30 TWh | 3.29 TWh |
| 2025-12 | 3.28 TWh | 3.29 TWh |
| 2026-01 | 3.20 TWh | 3.19 TWh |
| 2026-02 | 2.95 TWh | 2.95 TWh |
| 2026-03 | 3.36 TWh | 3.37 TWh |
| 2026-04 | 3.26 TWh | 3.26 TWh |
| 2026-05 | 3.56 TWh | 3.56 TWh |
| 2026-06 | 3.57 TWh | 3.57 TWh |
| 2026-07 | 3.96 TWh | 3.97 TWh |
| 2026-08 | 3.93 TWh | 3.94 TWh |
| 2026-09 | 3.50 TWh | 3.51 TWh |
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of September 2026.
Seasonal Patterns in New Zealand
Ember monthly statistics, complete years only, through September 2026Electricity demand by month
Look for the brightest columns. Averaged over 2016 to 2025, demand is highest in July and lowest in December, and the busiest month uses 18% more electricity per day than the quietest.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 3.15 | 3.02 | 3.25 | 3.16 | 3.51 | 3.56 | 3.84 | 3.91 | 3.53 | 3.45 | 3.30 | 3.28 |
| 2024 | 3.31 | 3.17 | 3.33 | 3.28 | 3.78 | 3.54 | 3.89 | 3.72 | 3.31 | 3.28 | 3.18 | 3.21 |
| 2023 | 3.21 | 2.92 | 3.16 | 3.12 | 3.50 | 3.61 | 3.77 | 3.92 | 3.38 | 3.36 | 3.20 | 3.24 |
| 2022 | 3.13 | 2.83 | 3.13 | 3.17 | 3.45 | 3.55 | 3.78 | 3.74 | 3.49 | 3.44 | 3.17 | 3.18 |
| 2021 | 3.11 | 2.94 | 3.24 | 3.14 | 3.47 | 3.44 | 3.72 | 3.56 | 3.32 | 3.25 | 3.11 | 3.08 |
| 2020 | 3.34 | 3.17 | 3.25 | 2.77 | 3.45 | 3.52 | 3.81 | 3.65 | 3.44 | 3.41 | 3.18 | 3.19 |
| 2019 | 3.30 | 3.09 | 3.33 | 3.26 | 3.49 | 3.63 | 3.73 | 3.80 | 3.47 | 3.41 | 3.22 | 3.27 |
| 2018 | 3.29 | 2.95 | 3.21 | 3.23 | 3.55 | 3.69 | 3.78 | 3.75 | 3.46 | 3.40 | 3.19 | 3.14 |
| 2017 | 3.20 | 3.05 | 3.30 | 3.17 | 3.57 | 3.57 | 3.80 | 3.68 | 3.41 | 3.33 | 3.30 | 3.32 |
| 2016 | 3.21 | 3.13 | 3.34 | 3.18 | 3.41 | 3.49 | 3.70 | 3.79 | 3.40 | 3.27 | 3.16 | 3.22 |
- Lower demand per day
- Higher demand per day
- No data
- Each cell shows the month's total demand in TWh, and colour compares demand per day so short months are not shaded as quiet. Lowest cell 2.77 TWh, highest 3.92 TWh. Colours are relative to New Zealand alone.
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of September 2026. Complete calendar years only.
Countries With a Similar Electricity Mix
Ember annual, 2025New Zealand's closest match is Costa Rica, 76.7% the same.
- Costa Rica 76.7% the same Costa Rica generates 20.9 points more hydro than New Zealand
- Iceland 76.3% the same Iceland generates 17.2 points more hydro than New Zealand
- Brazil 74.8% the same Brazil generates 22.2 points less other renewables than New Zealand
- Canada 74.7% the same Canada generates 22.2 points less other renewables than New Zealand
- Austria 74.0% the same Austria generates 22.2 points less other renewables than New Zealand
How close: the share of generation that would have to change fuel for one mix to match the other (half the sum of the fuel share differences); 100% minus that is "the same". Grids under 1 TWh are skipped. Grid twins: the 25 closest pairs and every country's nearest match
New Zealand Electricity FAQ
What is the main source of electricity in New Zealand?
Hydro was the largest source of electricity in New Zealand in 2025, supplying 54.0% of generation, followed by other renewables (22.2%) and wind (9.6%). Figures are Ember annual statistics.
How much electricity does New Zealand use?
New Zealand used 44.0 TWh of electricity in 2025, about 8.25 MWh per person.
How clean is New Zealand's electricity?
Generating a kilowatt hour of electricity in New Zealand emitted 97 gCO2/kWh in 2025, and low carbon sources supplied 88.2% of generation. That is 79% below the world average of 460 gCO2/kWh.
When does New Zealand use the most electricity?
Averaged over 2016 to 2025, New Zealand's electricity demand is highest in July and lowest in December. The busiest month uses 18% more electricity per day than the quietest (Ember monthly data).
Related
Cite this page
World Power Monitor. (2026). New Zealand Electricity: Generation Mix, Demand and Emissions. https://worldpowermonitor.com/countries/new-zealand/
World Power Monitor. New Zealand Electricity: Generation Mix, Demand and Emissions. Data as of 2026-09. Data from Ember. https://worldpowermonitor.com/countries/new-zealand/
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note = {Data as of 2026-09. Data from Ember.},
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