Other power plant in Hawaii, United States of America. Approximate location 21.9965, -159.3758.
OtherHawaiiUnited States of AmericaCO₂ modelled
Kapaia Power Station is a 39 MW other power plant in Hawaii, United States of America. It is operated by Kauai Island Utility Cooperative. Based on reported annual generation of 174 GWh, it can supply roughly 50k homes. It ranks #4034 of 10,938 United States of America power plants by installed capacity. Commissioned in 2002, it is around 24 years old — relatively modern. Its modelled annual emissions are 25,680 t CO₂/yr (Climate TRACE), equivalent to about 6.0k cars driven for a year. In context, the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0056258.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and/or fuel fields on this page include a source-backed provenance label from GEM, an official registry, Wikidata, OSM, or a cross-source match.
capacity: Wikidata P2109 nameplate capacity; fuel: WRI source-record fuel
At 39 MW, Kapaia Power Station is well above the median other plant in United States of America (22 MW). This facility converts its energy source into electricity for the grid; its capacity, fuel type and location determine its role in the national power mix.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Operated by Kauai Island Utility Cooperative.
This other plant generates electricity for the grid. It sits in a tropical savanna climate (Köppen As) — Northern Hemisphere, latitude 22.0°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
This site has effectively no heating season (tropical/equatorial climate), so winter heat loss is not the driver here. The thermal concern shifts to year-round process heat and humidity/heat-driven corrosion of hot equipment.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
For a plant’s outdoor hardware — heat-recovery steam generators (HRSG), expansion joints, valves, flanges and their insulation — the local climate sets how fast unprotected steel and coatings degrade. This site sits in an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion the leading environmental stress.
Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
The #7 largest other power plant of 19 in United States of America by capacity.
United States of America has 19 other power plants in this dataset, together about 681 MW of capacity.
Coordinates 21.9965, -159.3758 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Kapaia Power Station is a 39 MW source-record other power plant in Hawaii, United States of America, commissioned in 2002.
Kapaia Power Station generates about 174 GWh of electricity per year.
Its output is enough to supply roughly 49,800 homes.
Kapaia Power Station is operated by Kauai Island Utility Cooperative.
Kapaia Power Station has modelled emissions of about 25,680 tonnes of CO₂ per year (Climate TRACE).
