New Zealand Energy Quarterly
The New Zealand Energy Quarterly provides quarterly data and analysis on energy supply, demand, prices and associated greenhouse gas emissions. This page has the current edition.
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Current Energy Quarterly publication
The current edition of Energy Quarterly is for the July to September quarter (Q3) 2025. It was released on 11 December 2025. The next Energy Quarterly will be released on 12 March 2026.
Main highlights for this quarter
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89.4% of electricity generation came from renewable sources, up from 81.2% in the September 2024 quarter.
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Driving this was a 22.6% increase in hydro generation due to more favourable hydro conditions and continued increases in generation from solar (up 64.2%) and geothermal (up 6.5%).
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In contrast, wind generation was down 9.4% with lower-than-average wind speeds during July and August in the lower North Island (where the largest wind farms in the country are located).
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With more electricity generation from renewables, less generation was needed from non-renewable sources to meet demand. Generation from coal was down 67.4% (596 GWh) and generation from gas was down 22.5% (284 GWh).
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Electricity consumption increased 3.8%, with residential electricity consumption reaching a new quarterly record at 4,511 GWh.
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Industrial electricity consumption increased 10.8% to 3,119 GWh, a similar level to the September 2023 quarter. The September 2024 quarter saw New Zealand Aluminium Smelters’ demand response agreement being called on, which reduced their electricity use. An agreement was in place for demand response to be provided over winter 2025, however this was at a lower level.
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Gas use in the chemicals sector (both for energy purposes and as a feedstock) increased. The previous September quarter saw Methanex idling their production facilities from mid-August to the end of October 2024. Methanex paused operations again in 2025 to free up gas for the generation market, although this was from mid-May to early July and had minimal impact on the September 2025 quarter.
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Petrol prices decreased 4.43% from 264.1 cents per litre to 252.4 cents per litre, and diesel prices decreased 5.90% from 192.3 cents per litre to 180.9 cents per litre. In April 2025, eight members of the OPEC+ started gradually increasing their production which has led to reductions in the cost of crude oil and importer costs over the last two quarters.
Read the summary for this quarter
New Zealand Energy Quarterly September 2025 summary
Read the media release for this quarter
Favourable conditions see hydro increase overall renewable electricity generation
Access the data
For more detailed data, see the relevant page:
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Previous Energy Quarterly editions
You can view previous years' editions of the New Zealand Energy Quarterly here.
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