West Loch Solar One — Plant Summary
- EIA Plant ID
- 61987
- Capacity
- 20 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Operating
- Location
- Honolulu, HI
- Operating Since
- 2019
- Generators
- 1
- Operator
- Hawaiian Electric Co Inc
- Parent Company
- Hawaiian Electric Industries
- Annual Generation
- 36,464 MWh
- Capacity Factor
- 20.8%
- Balancing Authority
- Hawaiian Electric Co Inc
- ISO/RTO
- —
- NERC Region
- —
West Loch Solar One
OperatingSolar
Ranked #5 of 23 Solar plants in HI#1718 of 7447 nationally
20 MW Solar operating in Honolulu, HI — Hawaiian Electric Co Inc
EIAGEMWD
20 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2019
Operating Since
Location
Coordinates
21.3403, -158.0151
County
Honolulu, HI
Nearby Plants
- Kalaeloa Renewable Energy ParkSolar5 MW · 2.9 km
- Waipio PeninsulaSolar11 MW · 4.0 km
- AES West Oahu Solar HybridBESS25 MW · 6.0 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Hawaiian Electric Co Inc | Hawaiian Electric Company | — |
| Owner(s) | Hawaiian Electric Co Inc | Hawaiian Electric Industries | — |
| Status | Operating | operating | — |
Ownership Chain
About
West Loch Solar One is a 20 MW solar photovoltaic power plant located in Honolulu County, Hawaii. The plant, which began operating in 2019, has one generator and utilizes fixed-tilt solar tracking technology. It is owned by Hawaiian Electric Industries and operated by Hawaiian Electric Co Inc, which also serves as the balancing authority. The plant's primary fuel source is the sun.
In its most recent year of operation, West Loch Solar One generated 36,464 MWh of electricity, achieving a capacity factor of 20.8%. The plant is ranked as the 4th largest solar facility out of 19 in the state of Hawaii, and 1379th out of 7108 nationally. Financial data is available for the plant from LBNL Solar.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
—
Balancing Authority
Hawaiian Electric Co Inc
Grid Voltage
46 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
2.6K MWh
Latest Month
36.5K MWh
Annual Generation
20.8%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: LBNL Utility-Scale SolarHIGH
$68.0/MWh
LCOE (Levelized Cost)
$171.0/MWh
Energy Value
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (9)Beta
Hazards·flooding
Flash Flood Warning: Oahu in Honolulu, HI
Flash Flood Warning issued March 21 at 8:40AM HST until March 21 at 11:00AM HST by NWS Honolulu HI
Flash Flood Warning (hazard)
NWS Honolulu HI·5 days ago
Hazards·flooding
Flood Watch: Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; M
Flood Watch issued March 21 at 3:53AM HST until March 22 at 6:00PM HST by NWS Honolulu HI
Flood Watch (hazard)
NWS Honolulu HI·5 days ago
General
Navy to lease Pearl Harbor land to developer for proposed biofuel, solar plant
The site would include the biofuel-powered firm renewable generation plant, biodiesel storage tanks, biomethane storage and offloading terminals.
The Business Journals·1 years ago
General
Hey Oahu, Your Electric Bill Is About To Go Up
Hawaiian Electric says the upcoming switch from coal to oil will increase the cost to consumers as the state moves to renewable energy.
Honolulu Civil Beat·3 years ago
Last updated 2026-03-21
View all 9 articles