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Wainiha Hydro

Hydro power plant · Kauai County, Hawaii

Nameplate capacity
3.6 MW
Rank in Hawaii
#60
of 76 plants
In service since
2006
January 2006

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
BBCP Kauai Operating LLC
County
Kauai County
Generating units
2
Share of state capacity
0.10%
Rank among hydro plants in Hawaii
#4 of 8
EIA plant code
10413

Generating units

Individual generating units at Wainiha Hydro
UnitTechnologyNameplateSummerOnlineStatus
WAIAConventional Hydroelectric1.8 MW1.7 MW2006Operating
WAIBConventional Hydroelectric1.8 MW1.7 MW2010Operating

Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.

Similarly sized plants in Hawaii

Waihonu North SolarSolar5.0 MW
Kaheka HydroHydro4.5 MW
Mauka FIT OneSolar3.5 MW
PuueoHydro3.1 MW

About this data

From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 3.6 MW solar plant and a 3.6 MW nuclear plant have the same entry here and produce very different amounts of electricity.

“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Hawaii power plants · What Hawaii actually generates