Mililani South Solar Farm
94-830 Lanikuhana Ave, Mililani, HI 96789Plant Summary Information
Mililani South Solar Farm is ranked #22 out of 67 power plants in Hawaii in terms of total annual net electricity generation.
Mililani South Solar Farm generated 19.1 GWh during the 3-month period between June 2025 to September 2025.
| Plant Name | Mililani South Solar Farm |
|---|---|
| Utility Name | Mililani I Solar LLC |
| Location | Honolulu County, HI |
| Initial Operation Date | July 2022 |
| Last Update | Sep 2025 |
| Annual Generation | 64.6 GWh |
| Annual Consumption | 265.4 k MMBtu |
| Ranked #3,814 out of 12,539 Power Plants Nationwide | |
| Ranked #894 out of 6,400 Solar Power Plants Nationwide | |
| Ranked #22 out of 67 Hawaii Power Plants | |
| Ranked #4 out of 31 Hawaii Solar Power Plants | |
| Fuel Types | Solar |
| Previous Operator |
Lanai Sustainability Research LLC (2013 to 2018) Mililani I Solar LLC (2019 to 2024) |
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Monthly Net Generation for Mililani South Solar Farm
Mililani South Solar Farm Details
| Summary Information | |
|---|---|
| Plant Name | Mililani South Solar Farm (57242) |
| Plant Address | 94-830 Lanikuhana Ave, Mililani, HI 96789 |
| Utility | Mililani I Solar LLC (62893) |
| Latitude, Longitude | 21.42792, -158.01985 |
| Generation Dates on File | Aug 2022 to Sep 2025 |
| Initial Operation Date | July 2022 |
| Annual Generation | 64.6 GWh |
| Fuel Types | Solar |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | No |
| FERC Exempt Wholesale Generator Status | Yes |
| FERC Exempt Wholesale Generator Docket Number | EG21-259 |
| Regulatory Information | |
|---|---|
| Regulatory Status | Non-Regulated |
| NERC Region | |
| Balancing Authority | () |
| NAICS Code | Utilities (22) |
| Sector | IPP Non-CHP (2) |
| Water Source | |
| Ash Impoundment | |
| Transmission / Distribution Owner | Hawaiian Electric Co Inc (19547) HI |
| Grid Voltage | 138.00 kV |
| Energy Storage | Yes |
Generator 1 Details Operating July 2022
| Technology | Solar Photovoltaic |
|---|---|
| Prime Mover | Photovoltaic |
| Ownership | Single Owner |
| Nameplate Capacity | 39 MW |
| Summer Capacity | 39 MW |
| Winter Capacity | 39 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | July 2022 |
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Solar |
| Time From Cold Shutdown To Full Load | 10M |
| Solar Details | |
| Single Axis Tracking | Yes |
|---|---|
| Azimuth Angle | 180 |
| Tilt Angle | 50 |
| DC Net Capacity | 50.1 MW |
| Crystalline Silicon | Yes |
| Net Metering Agreement | No |
| Virtual Net Metering Agreement | No |
Generator 2 Details Operating July 2022
| Technology | Batteries |
|---|---|
| Prime Mover | Battery |
| Ownership | Single Owner |
| Nameplate Capacity | 39 MW |
| Summer Capacity | 39 MW |
| Winter Capacity | 39 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | July 2022 |
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Electricity used for energy storage |
| Time From Cold Shutdown To Full Load | 10M |
| Energy Storage Details | |
| Nameplate Energy Capacity MWH | 156 |
|---|---|
| Maximum Charge Rate | 39 MW |
| Maximum Discharge Rate | 39 MW |
| Storage Technology | LIB |
| Nameplate Reactive Power Rating | 156 |
| Storage Enclosure Type | CS |
| Excess Wind And Solar Generation | P |
| Ac Coupled | Yes |
| Direct Support Of Another Unit | Yes |
| Direct Support Plant Id | 57242 |
| Direct Support Gen Id | 1 |
| Support T D Asset | Yes |
Mililani South Solar Farm Plant Owners
| Owner Name | Address | Generator | Ownership | We couldn't locate any owners for this plant |
|---|
Power Plants with Similar Net Generation
Power plants with a similar annual net generation from Solar.
| Rank | Plant Name | Plant Location | Annual Generation |
|---|---|---|---|
| #884 | Fillmore County Solar Project | Spring Valley, MN | 75.6 GWh |
| #885 | Fayette Solar | Greenfield, OH | 75.4 GWh |
| #886 | Earp Solar, LLC | Monmouth, IL | 75.0 GWh |
| #887 | Whitehorn Solar | Gretna, VA | 74.8 GWh |
| #888 | Coffeen Solar BESS | Coffeen, IL | 73.9 GWh |
| #889 | Kawailoa Solar | Haleiwa, HI | 74.0 GWh |
| #890 | Elm City Solar Facility | Elm City, NC | 73.6 GWh |
| #891 | Peony Solar | Springfield, SC | 73.5 GWh |
| #892 | Hoot Lake Solar | Fergus Falls, MN | 72.8 GWh |
| #893 | Little Bear Solar 1, LLC | Mendota, CA | 71.6 GWh |
| #895 | San Isabel Solar, LLC | Trinidad, CO | 71.0 GWh |
| #896 | Central 40 | Newman, CA | 70.8 GWh |
| #897 | Chaves County Solar II | Roswell, NM | 70.8 GWh |
| #898 | New Market Solar | Sardinia, OH | 70.5 GWh |
| #899 | SR Bell Buckle | Shelbyville, TN | 69.9 GWh |
| #900 | Robin Hollow Solar | West Greenwich, RI | 69.7 GWh |
| #901 | FL Solar 4, LLC | Tallahassee, FL | 69.6 GWh |
| #902 | Shallow Basket | Dulce, NM | 68.2 GWh |
| #903 | Crescent Dunes Solar Energy | Tonopah, NV | 69.1 GWh |
| #904 | Dry Bridge Solar (Brown University) | North Kingstown, RI | 68.7 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Mililani South Solar Farm.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| AES West Oahu Solar Hybrid | Waipahu, HI | 22.6 GWh | 4.7 mi |
| Aloha Solar Energy Fund 1 PK1 | Waianae, HI | 6.6 GWh | 8.6 mi |
| HNL Emergency Power Facility | Honolulu, HI | 5.8 GWh | 9 mi |
| Ho'Ohana Solar 1 | Waipahu, HI | 20.2 GWh | 1 mi |
| Kahe | Kapolei, HI | 2.9 TWh | 8.6 mi |
| Kalaeloa Cogen Plant | Kapolei, HI | 1.4 TWh | 10 mi |
| Kalaeloa Renewable Energy Park | Ewa Beach, HI | 4.3 GWh | 7 mi |
| Kalaeloa Solar Two | Honolulu, HI | 7.7 GWh | 8.6 mi |
| Kapolei Solar Energy Park | Kapolei, HI | 1.4 GWh | 9.7 mi |
| Lanikuhana Solar LLC | Mililani, HI | 32.3 GWh | 0.2 mi |
| Pearl City Peninsula Solar Park | Honolulu, HI | 1.2 GWh | 4.9 mi |
| Schofield Generating Station | Schofield Barracks, HI | 7.3 GWh | 4.3 mi |
| Tesoro Hawaii | Kapolei, HI | 157.5 GWh | 9.8 mi |
| Waiau | Pearl City, HI | 858.9 GWh | 4.6 mi |
| Waiawa Solar Power Hybrid | Waipahu, HI | 61.7 GWh | 3.2 mi |
| Waihonu North Solar | Mililani, HI | 4.5 GWh | 3 mi |
| Waihonu South Solar | Mililani, HI | 1.3 GWh | 2.8 mi |
| Waipio Peninsula | Waipio, HI | 17.5 GWh | 5 mi |
| Waipio Solar | Waipio, HI | 100.0 GWh | 3.1 mi |
| West Loch Solar One | Ewa Beach, HI | 36.5 GWh | 6.1 mi |