Where is Mililani South Solar Farm?

In Honolulu County, Hawaii (HI). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

How big is Mililani South Solar Farm?

78 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.

Who owns Mililani South Solar Farm?

EIA-860M names Mililani I Solar LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Mililani South Solar Farm LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Mililani I Solar LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Mililani South Solar Farm LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Mililani South Solar Farm still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Mililani South Solar Farm

Mililani South Solar Farm is a 78 MW battery storage project in Honolulu County, Hawaii, operated by Mililani I Solar LLC. EIA-860M lists 2 generating units here. Its units entered service in 2022.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 78 MW; 78 MW net summer
Generating units: 2
In service: 2022
EIA plant ID: 57242

Where it is

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County: Honolulu County, Hawaii
Coordinates: 21.4279, -158.0199
Balancing authority: Not reported
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Mililani I Solar LLC
Primary energy source: Battery
Technologies: Batteries, Solar Photovoltaic
Status: Operating

This site runs on more than one energy source. EIA-860M capacity splits: Battery 39 MW, Solar 39 MW. It is filed here under Battery, the source with the most capacity.

Every plant Mililani I Solar LLC reports to EIA →

Mililani South Solar Farm: FAQ

Where is Mililani South Solar Farm?: In Honolulu County, Hawaii (HI). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Mililani South Solar Farm?: 78 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns Mililani South Solar Farm?: EIA-860M names Mililani I Solar LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Mililani South Solar Farm LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Mililani I Solar LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Mililani South Solar Farm LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Mililani South Solar Farm still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.