Storage power plant in Hawaii, United States of America. Approximate location 21.9082, -159.492.
StorageHawaiiUnited States of America
AES LAWAI SOLAR Hybrid is a 40 MW storage power plant in Hawaii, United States of America. It is operated by AES LAWAI SOLAR LLC. Based on reported annual generation of 38 GWh, it can supply roughly 11k homes. It ranks #3987 of 10,938 United States of America power plants by installed capacity. Commissioned in 2019, it is around 7 years old — recently built. As a non-combustion source, it has no direct CO₂ emissions from generation. 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 USA0061068.
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 40 MW, AES LAWAI SOLAR Hybrid is well above the median storage plant in United States of America (4 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.
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Operated by AES LAWAI SOLAR LLC.
This storage plant stores and releases electricity (pumped-hydro or batteries) to balance the grid. It sits in a tropical savanna climate (Köppen As) — Northern Hemisphere, latitude 21.9°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 #1 largest storage power plant of 104 in United States of America by capacity.
United States of America has 104 storage power plants in this dataset, together about 815 MW of capacity.
Coordinates 21.9082, -159.492 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
AES LAWAI SOLAR Hybrid is a 40 MW source-record storage power plant in Hawaii, United States of America, commissioned in 2019.
AES LAWAI SOLAR Hybrid generates about 38 GWh of electricity per year.
Its output is enough to supply roughly 10,714 homes.
AES LAWAI SOLAR Hybrid is operated by AES LAWAI SOLAR LLC.
