Fleet by fuel
Fleet interpretation
Mercury Energy is represented here as an asset portfolio, not just a company label. The visible fleet spans 1 country; the largest concentration is New Zealand (12).
The fuel mix by asset count is hydro (8), geothermal (4). The largest listed asset is Maraetai in New Zealand (360 MW), and the mean listed unit size is about 118 MW across units with capacity data.
CO₂ coverage is source-labelled: 0 plants have a reported or modelled CO₂ value in the dataset, including 0 measured records. Missing values remain blank rather than inferred as company totals.
Method: plant-level records are grouped by owner/operator label, then aggregated by country, fuel, capacity and CO₂ provenance.
All 12 plants
| Plant | Fuel | Country | MW | t CO₂/yr |
|---|---|---|---|---|
| Maraetai | Hydro | New Zealand | 360 | — |
| Arapuni | Hydro | New Zealand | 164 | — |
| Nga Awa Purua | Geothermal | New Zealand | 140 | — |
| mokai | Geothermal | New Zealand | 113 | — |
| Ohakuri | Hydro | New Zealand | 106 | — |
| Kawerau | Geothermal | New Zealand | 100 | — |
| Whakamaru | Hydro | New Zealand | 100 | — |
| Karapiro | Hydro | New Zealand | 96 | — |
| Aratiatia | Hydro | New Zealand | 78 | — |
| Atiamuri | Hydro | New Zealand | 74 | — |
| Waipapa | Hydro | New Zealand | 54 | — |
| Rotokawa | Geothermal | New Zealand | 35 | — |
Ownership & capacity: WRI Global Power Plant Database (CC BY 4.0). CO₂ is measured for EPA/EU ETS records and modelled for Climate TRACE records.
Frequently asked questions
How many power plants does Mercury Energy operate?
Mercury Energy operates 12 power plants across 1 country, with about 1,420 MW of total capacity.
What is Mercury Energy's largest power plant?
Maraetai in New Zealand is its largest at about 360 MW.
What types of power plants does Mercury Energy run?
Its fleet includes hydro (8), geothermal (4).