PROPOSED ENERGY PROJECTS

In 2015, Hawai‘i enacted a law that requires electric utility companies to sell only renewable energy to their customers by 2045 (Act 97) — the first such mandate in the United States.

the first steps in implementing a utility-scale renewable energy project

Although each utility is different, typically the process begins with issuing a request for proposals (RFP) asking developers to submit bids to build a project and sell the energy to the utility. Developers scope out locations, materials, and develop cost estimates that conform to the utility’s requirements. The process is reviewed by the Public Utilities Commission through a quasi-judicial public forum and selected bidders must sign a Power Purchase Agreement (PPA) that is reviewed in another public process prior to approval.

The Hawai‘i State Energy Office encourages developers, communities, and affected residents to begin working with each other when projects are in the early scoping phase rather than after a PPA has been executed. This allows communities and residents to contribute meaningfully to all aspects of the project’s development and gives developers the information they need to submit a successful bid and keep their project on schedule. This website provides communities and residents with the information they need to engage in the process and opportunities for public input.

TWO ELECTRIC UTILITIES DELIVER POWER TO Hawai‘i RESIDENTS

Hawaiian Electric and Kaua‘i Island Utility Cooperative (KIUC). Hawaiian Electric is a shareholder-owned public utility serving Hawai‘i Island, Lāna‘i, Maui, Moloka‘i, and O‘ahu. KIUC is a member-owned utility cooperative. Each island operates as an independent electric grid. Both utility companies are regulated by the Hawai‘i Public Utilities Commission (PUC). The public can access PUC filings related to individual projects and proceedings through the PUC’s online Document Management System provided users have the Docket Number of interest. Individual docket numbers can be found through the PUC homepage or through PUC’s Annual Reports to the Hawai‘i State Legislature.

Hawai‘i’s fossil fuel power plants have provided electricity to Hawai‘i residents for decades, but they are old, inefficient, and rely on internationally-sourced imported fuels subject to volatile energy markets. Hawaiian Electric and KIUC need a variety of renewable energy projects to replace these plants.

Each new utility-scale renewable energy project must be submitted to the PUC for review and decision. Some of these projects have been approved by the PUC, others are currently under review. An individual PUC docket has been created for each utility-scale renewable energy project listed on this website.

HAWAIIAN ELECTRIC COMPANY

Hawaiian Electric is seeking new renewable energy solutions to displace the aging fossil fuel power plants that currently serve its customers. The 180-megawatt coal plant at Campbell Industrial Park on O‘ahu, owned and operated by AES, will close by September 1, 2022. It is the state’s only coal-powered power plant and provides approximately 16% of Oahu’s electrical energy during peak demand. By the end of 2024, the 38-MW oil-fired Kahului Power Plant, owned and operated by Hawaiian Electric, is scheduled to close. It provides approximately 15% of Maui Island’s 24/7 power generation capacity. In addition, Hawaiian Electric plans to retire its Wai‘au 3 and 4 generators on O‘ahu, totaling 93 MW, by 2024.

Hawaiian Electric is required by the PUC to competitively bid for the new renewable energy power production it intends to buy and sell to its customers. In February 2018 and August 2019, Hawaiian Electric issued Stage 1 and Stage 2 competitive solicitations for new renewable energy generation projects on O‘ahu, Maui, and Hawai‘i Island. Stage 1 produced eight utility-scale solar photovoltaic (PV) plus storage projects. In August 2019, Hawaiian Electric issued Stage 2 of its competitive solicitation for new renewable energy generation and stand-alone energy storage projects on O‘ahu, Maui, and Hawai‘i Island. Stage 2 produced to date nine utility-scale solar PV plus storage projects and three utility-scale stand-alone storage projects.

On January 21, 2021, the Commission provided the Companies guidance to develop a Stage 3 RFP specifically for Hawai‘i Island. The Commission intends that this will be an “all-source” procurement, based upon an updated assessment of grid needs for the island. In compliance with that guidance, the Companies are proceeding with work on a Stage 3 RFP draft for Hawai‘i Island. More information on the Stage 3 RFP can be found on Hawaiian Electric’s webpage.

Hawaii Ocean

KAUAI ISLAND UTILITY COOPERATIVE

KIUC is in the planning stages for a solar + pumped-storage hydropower project planned in the Waimea District of Kauai. As proposed, the project would provide 18%-24% of Kauai’s electric utility needs including long duration storage. The long duration storage capacity (approximately 12 hours) will allow the island to run on 100 percent renewable energy for prolonged periods without sunlight and provide additional grid stability.

Hawai‘i State Energy Office’s Comment on the Draft Environmental Assessment published in August 2021 for the West Kauai Energy Project.

KIUC projects are not subject to competitive procurement; however, projects seeking any power purchase agreement require approval from the PUC.

Utility Scale Project Development Process General Summary

The figure shows the general process for a project moving through the competitive bidding framework. It is important to note that the PUC approves both the utilities’ request for proposals (RFP), the guiding document for project selection, as well as the individual project PPAs. Projects that do not go through formal competitive bids generally start the process at step four.

The PUC docket process is in open forum that allows for public comment at any time in the proceeding. In addition, each project must obtain the requisite federal, state, and county permits and approvals, many of which offer opportunity for public comment. HSEO’s Hawai‘i Statewide Energy Projects Directory and Hawaiian Electric’s Renewable Project Status Board provide additional information on these projects and other utility-scale projects now under development or construction, approved by the PUC, or awaiting PUC approval.

OPPORTUNITIES TO PROVIDE INPUT AND LEARN MORE ABOUT PROPOSED PROJECTS AND UPCOMING RFPS

HSEO posts public input opportunities for each project as they are announced. Please contact HSEO if you would like an outreach event about a particular project to be added.

PROJECTS PROPOSED FOR DEVELOPMENT AND UNDER DEVELOPMENT (BY ISLAND AND ESTIMATED COMPLETION DATE)

Project NameIslandLocationDeveloperCapacity (Megawatts, Megawatt-hours Alternating Current)Utility’s Renewable Energy (%)Project StatusEstimated Completion DateZip CodeTax Map Key(s)PUC DocketInformation Links
O’ahu
Mililani I Solar
OahuMililaniClearway Energy Group39 MW + 156 MWh Storage1.2PUC Approved; ConstructingJuly 31, 202296789(1)9-4-005:090
(1)9-4-005:092
(1)9-4-005:096
(1)9-4-005:091
2018-0434
Waiawa Solar PowerOahuPearl CityClearway Energy Group36 MW+ 144 MWh Storage1.2PUC Approved; ConstructingNovember 14, 202296797(1)9-6-004:0242018-0435
AES West Oʻahu SolarOahuKapoleiAES12.5 MW + 50 MWh Storage0.4PUC Approved; PermittingJanuary 20, 202396707(1)9-2-002:0072019-0050AES West Oʻahu Solar
AES Mountain View SolarOahuWaiʻanaeAES7 MW + 35 MWh Storage0.3PUC Approved; PermittingMay 17, 202396792(1)8-5-003:031
(1)8-5-003:032
(1)8-5-019:034
2020-0139AES Mountain View Solar
Hoohana Solar 1OahuKunia174 Power Global, Hanwha Energy USA52 MW + 208 MWh Storage 1.4PUC Approved; PermittingDecember 15, 202396797(1)9-4-002:0522018-0431
Waiawa Phase 2 SolarOahuPearl City, Waipio VillageAES30 MWac + 240 MWh Storage1.2PUC Approved; PermittingOctober 30, 202396797(1)9-6-004:024
(1)9-6-004:025
(1)9-6-004:026
(1)9-6-006:036
2020-0137Waiawa Phase 2 Solar
Barbers Point SolarOahuKapoleiInnergex15 MWac + 60 MWh Storage0.4PUC Review, PPA requires AmendmentDecember 29, 202396707(1)9-1-013:038
(1)9-1-013:040
2020-0143Barbers Point Solar
Paeahu SolarMauiWaileaInnergex Renewable Energy15 MW + 60 MWh Storage0.5PUC Approved; PermittingSeptember 8, 202396790(2)2-1-008:0012018-0433Paeahu Solar
AES Kuihelani SolarMauiWaikapuAES60 MW + 240 MWh Storage1.9PUC Approved; PermittingOctober 27, 2023N/A(2)3-8-005:002
(2)3-8-006:003
2018-0436AES Kuihelani Solar
Kahana SolarMauiNapili-HonokowaiInnergex20 MWac + 80 MWh Storage 0.7PUC Approved, PermittingDecember 29, 2023N/A(2)4-3-001:0172020-0142Kahana Solar
Kamaole SolarMauiKiheiKamaole Solar LLC (Potentia Renewables)40 MWac + 160 MWh Storage 1.4PUC Approved, PermittingOctober 29, 202496753(2)2-2-002:001
(2)2-2-002:050
2021-0026Kamaole Solar
Hawai‘i Island
AES Waikoloa SolarWaikoloaAES30 MWac + 120 MWh Storage0.8PUC Approved; ConstructingDecember 26, 202296743(3)6-8-002:0502018-0430AES Waikoloa Solar
Hale Kuawehi SolarWaimeaInnergex Renewable Energy, Paniolo Power30 MW + 120 MWh Storage0.8PUC Approved; ConstructingMay 5, 202396743(3)6-7-001:0252018-0432Hale Kuawehi Solar
Kauai
West Kaua‘i Energy ProjectKauaiKekahaAES and KIUC35 MW + 1500 MWh Storage22.7PUC Approved; Undergoing Environmental ReviewTBD96752Multiple, See Directory2020-0218West Kauai Energy Project

Project information will be updated as information becomes publicly available.

STAND-ALONE STORAGE PROJECTS

Project NameIslandLocationDeveloperEnergy Storage Capacity (Megawatts, Megawatt-hours)
Utility’s Renewable Energy (%)Project StatusEstimated Completion DateZip CodeTax Map KeyPUC DocketInformation Links
Kapolei Energy StorageOahuKapoleiPlus Power185 MW / 565 MWh0.1PUC Approved; PermittingMarch 10, 202396707(1)9-1-014:0422020-0136Kapolei Energy Storage
Keahole Battery Energy StorageHawai‘iKailua-KonaHawaiian Electric Company, Inc.12 MW / 12 MWh (1 hr) N/AUnder PUC ReviewJanuary 23, 202496740(3)7-3-049:0362020-0127Keahole Project Summary
HE Self-Build Projects
Waena Battery Energy StorageMauiKahuluiHawaiian Electric Company, Inc.40 MW / 160 MWh (4 hr) 0.2Under PUC ReviewApril 26, 2024N/A(2)3-8-003:023 2020-0132Waena Project Summary
HE Self-Build Projects

Project information will be updated as information becomes publicly available.

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