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.

PROPOSED PROJECTS

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

Project information will be updated as information becomes publicly available.

Project NameLocationDeveloperCapacity (Megawatts, Megawatt-hours)Project StatusEstimated Completion DateZip CodeTax Map Key(s)PPA Price ($/kWh)PUC DocketInformation Links
O‘ahu
Ho‘ohana Solar 1Kunia174 Power Global, Hanwha Energy USA52 MW + 208 MWh StoragePUC Approved; Constructing and PermittingMay 202596797(1)9-4-002:0520.0988582018-0431Ho‘ohana Solar 1
Waiawa Phase 2 SolarPearl City, Waipio VillageAES30 MW + 240 MWh StoragePUC Approved; PermittingOctober 202596797(1)9-6-004:024
(1)9-6-004:025
(1)9-6-004:026
(1)9-6-006:036
0.1241972020-0137Waiawa Phase 2 Solar
Pu‘uloa SolarPearl HarborAmeresco6 MW + 30 MWh StorageProject selected by utility202696818(1) 1-1-10-066To be announced2025-0218Pu‘uloa Solar
Pu‘uloa EnergyPearl HarborAmeresco99 MWProject selected by utility202796818(1) 9-9-001-008Under negotiation2017-0352Pu‘uloa Energy
Mahi Solar and StorageKuniaLongroad Energy120 MW + 480 MWh StorageProject selected by utility202696707(1) 9-2-004-010
(1) 9-2-004-003
(1) 9-2-004-006
(1) 9-2-004-012
Under negotiation2017-0352Mahi Solar and Storage
Base ProposalKapoleiKalaeloa Partners208 MWProject selected by utility203396707(1)9-1-031:023Under negotiation2017-0352Base proposal
Waiau RepowerPearl CityHawaiian Electric253 MWProject selected by utility202696782(1)9-8-003:010
(1)9-8-004:003
To be announced2025-0211Waiau Repower
Maui Nui
Kaheawa Wind 1 (repower)Ma‘alaeaTerraform US30 MWProject selected by utility2026967618-001-001-6001
3-6-001-014-6001
Under negotiation2017-0352Kaheawa Wind 1
Pulehu Solar & StoragePulehuLongroad Energy 20 MW + 80 MWh StorageProject selected by utility202796790(2)2-5-001-003Under negotiation2017-0352Pulehu Solar & Storage
Kuihelani Solar Phase 2Ma‘alaeaAES40 MW + 160 MWh StorageProject selected by utility202796793(2)3-8-005-002To be announced2025-0170Kuihelani Solar Phase 2
‘Ūkiu EnergyPuuneneAmeresco, Inc.40 MWProject selected by utility202796784(2) 3-8-003:024Under negotiation2017-0352‘Ūkiu Energy
Hawai‘i Island
Hale Kuawehi SolarWaimeaInnergex Renewable Energy, Paniolo Power30 MW + 120 MWh StorageCompletedMarch 202596743(3)6-7-001:0250.0873992018-0432Hale Kuawehi Solar
Hamakua Firm Renewable EnergyHonoka’aPacific Current60 MW + 30 MWh StorageProject selected by utility203096727(3) 4-5-002-056
(3) 4-5-002-057
Under negotiation2017-0352Hamakua Firm Renewable Energy
Keamuku SolarWaikoloa VillageAES86 MW + 344 MWh StorageProject selected by utility203096738(3) 6-8-002-008
(3) 6-8-002-010
To be announced2025-0171Keamuku Solar
Kaua‘i
Mana Solar & StorageKekahaAES35 MW + 140 MWh StorageProject selected by utilityNot yet available96752(4) 1-2-002:0010.1272025-0191Mana Solar & Storage
Kaawanui Solar & StoragePakala VillageAES43 MW + 172 MWh StorageProject selected by utilityNot yet available96769 (4) 1-7-006-010; (4) 1-7-006-0060.13342025-0198Kaawanui Solar & Storage
All commercial operations dates are subject to change.

STAND-ALONE STORAGE PROJECTS

Project NameIslandLocationDeveloperEnergy Storage Capacity (Megawatts, Megawatt-hours)
Utility’s Renewable Energy (%)Project StatusEstimated Completion DateZip CodeTax Map KeyPUC DocketInformation Links
Keahole Battery Energy StorageHawai‘iKailua-KonaHawaiian Electric Company, Inc.12 MW / 12 MWh (1 hr) N/AUnder PUC ReviewTBD96740(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 ReviewNovember 2026N/A(2)3-8-003:023 2020-0132Waena Project Summary
HE Self-Build Projects

Project information will be updated as information becomes publicly available.

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 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. 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.

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 an 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 the 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.

Hawaiian Electric Stage 3 Request for Proposals completed

The Hawaiian Electric Companies have filed RFPs with the Public Utilities Commission in Docket 2017-0352. More information is available on Hawaiian Electric’s Competitive Bidding Webpage. The RFP for Oahu and Maui is combined and was approved by the PUC with conditions. Hawaii Island has been approved by the PUC with conditions.

TWO ELECTRIC UTILITIES DELIVER POWER TO Hawai‘i RESIDENTS

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 operational utility-scale renewable energy project listed on this website.

HAWAIIAN ELECTRIC COMPANY

Hawaiian Electric is procuring resources as it phases out fossil fuels towards achieving the goal of 100% renewable energy by 2045. Hawaiian Electric employs a comprehensive competitive bidding process for renewable energy procurement across its service territories on Oʻahu, Maui, and Hawaiʻi Island. This structured process involves developing Requests for Proposals (RFPs), selecting projects, and negotiating contracts, all under the oversight of the Public Utilities Commission. The Hawaiian Electric procurement process has been adaptive, with the most recent change being requiring community benefits packages from developers to ensure communities hosting renewable energy projects see tangible benefits.

Hawaii Ocean

KAUAI ISLAND UTILITY COOPERATIVE

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

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