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Maalaea

Other power plant · Maui County, Hawaii

Nameplate capacity

230 MW

Rank in Hawaii

of 76 plants

In service since

1971

December 1971

Details

Primary fuel: Other
Technology: Petroleum Liquids
Operator: Maui Electric Co Ltd
County: Maui County
Generating units: 21
Share of state capacity: 6.23%
Rank among other plants in Hawaii: #4 of 25
EIA plant code: 6504

Generating units

Individual generating units at Maalaea
Unit	Technology	Nameplate	Summer	Online	Status
17	Petroleum Liquids	25 MW	18 MW	1998	Operating
19	Petroleum Liquids	25 MW	18 MW	2000	Operating
14	Petroleum Liquids	24 MW	21 MW	1992	Operating
16	Petroleum Liquids	24 MW	21 MW	1993	Operating
15	Petroleum Liquids	18 MW	12 MW	1993	Operating
18	Petroleum Liquids	18 MW	14 MW	2006	Operating
10	Petroleum Liquids	13 MW	12 MW	1979	Operating
11	Petroleum Liquids	13 MW	12 MW	1980	Out of service but expected to return to service in next calendar year
12	Petroleum Liquids	13 MW	12 MW	1988	Operating
13	Petroleum Liquids	13 MW	12 MW	1989	Operating
4	Petroleum Liquids	5.6 MW	5.5 MW	1973	Operating
5	Petroleum Liquids	5.6 MW	5.5 MW	1973	Operating
6	Petroleum Liquids	5.6 MW	5.5 MW	1975	Operating
7	Petroleum Liquids	5.6 MW	5.5 MW	1975	Operating
8	Petroleum Liquids	5.6 MW	5.5 MW	1977	Operating
9	Petroleum Liquids	5.6 MW	5.5 MW	1978	Operating
1	Petroleum Liquids	2.6 MW	2.5 MW	1971	Operating
2	Petroleum Liquids	2.6 MW	2.5 MW	1972	Operating
3	Petroleum Liquids	2.6 MW	2.5 MW	1972	Operating
X1	Petroleum Liquids	2.6 MW	2.5 MW	1987	Operating
X2	Petroleum Liquids	2.6 MW	2.5 MW	1987	Operating

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

Waiau	Other	375 MW
Kalaeloa Cogen Plant	Other	299 MW
Kapolei Energy Storage	Battery storage	185 MW
AES Maui Kuihelani Solar Hybrid	Battery storage	120 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 230 MW solar plant and a 230 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