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 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.


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 Case and Document Management System (CSMS) 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 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 closed on September 1, 2022 – representing a step forward in the transition to renewable energy. It was 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.

The Hawaiian Electric Stage 3 Procurement was approved by the PUC in 2022. Hawaiian Electric is currently undergoing competitive project selection with project selections anticipated in October 2023. Projects selected in this process will require PUC PPA approval.

Hawaii Ocean


KIUC is in the planning stages for a solar + pumped-storage hydropower project 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 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.


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.

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.


Project information will be updated as information becomes publicly available.

Project NameLocationDeveloperCapacity (Megawatts, Megawatt-hours Alternating Current)Utility’s Renewable Energy (%)Project StatusEstimated Completion DateZip CodeTax Map Key(s)PPA Price ($/kWh)PUC DocketInformation Links
AES West Oʻahu SolarKapoleiAES12.5 MW + 50 MWh Storage0.4PUC Approved; Constructing and PermittingMarch 28, 202496707(1)9-2-002:0070.1153185482019-0050AES West Oʻahu Solar
AES Mountain View SolarWaiʻanaeAES7 MW + 35 MWh Storage0.3PUC Approved; PermittingJune 202496792(1)8-5-003:031
0.1483791542020-0139AES Mountain View Solar
Ho’ohana Solar 1Kunia174 Power Global, Hanwha Energy USA52 MW + 208 MWh Storage 1.4PUC Approved; Constructing and PermittingOctober 202496797(1)9-4-002:0520.0988582018-0431
Waiawa Phase 2 SolarPearl City, Waipio VillageAES30 MW + 240 MWh Storage1.2PUC Approved; PermittingAugust 202496797(1)9-6-004:024
0.1435890542020-0137Waiawa Phase 2 Solar
Kūpono SolarWest Loch Pearl HarborAmeresco and Bright Canyon Energy42MW + 168 MWh Storage0.85PUC Approved; Constructing and Permitting April 202496706(1) 9-1-010-122
(1) 9-1-010-011
(1) 9-1-001-031
0.1237992022-0007Kupono Solar
Pu’uloa SolarPearl HarborAmeresco6 MW + 30 MWh StorageTBDProject selected by utility202696818(1) 1-1-10-066Under negotiationNot yet availablePu’uloa Solar
Pu’uloa EnergyPearl HarborAmeresco99 MWTBDProject selected by utility202796818(1) 9-9-001-008Under negotiationNot yet availablePu’uloa Energy
Mahi Solar and StorageKuniaLongroad Energy120 MW + 480 MWh StorageTBDProject selected by utility202696707(1) 9-2-004-010
(1) 9-2-004-003
(1) 9-2-004-006
(1) 9-2-004-012
Under negotiationNot yet availableMahi Solar and Storage
Makana LaPalehuaClearway Energy80 MW + 480 MWh StorageTBDProject selected by utility202696707(1)9-2-045:007
Under negotiationNot yet availableMakana La
Par Hawaii Renewable Combined Heat and PowerKapoleiPar Hawaii Refining33.9 MWTBDProject selected by utility202796707(1)9-1-031:003Under negotiationNot yet availablePar Hawaii Renewable Combined Heat and Power
Base ProposalKapoleiKalaeloa Partners208 MWTBDProject selected by utility203396707(1)9-1-031:023Under negotiationNot yet availableBase proposal
Waiau RepowerPearl CityHawaiian Electric253 MWTBDProject selected by utility202696782(1)9-8-003:010
Under negotiationNot yet availableWaiau Repower
Maui Nui
Paeahu SolarWaileaInnergex Renewable Energy15 MW + 60 MWh Storage0.5PPA terminated as of November 17, 2023TBD – Undergoing re-approval of CUP permits with County96790(2)2-1-008:0010.1168452018-0433Paeahu Solar
AES Kuihelani SolarWaikapuAES60 MW + 240 MWh Storage1.9PUC Approved; PermittingJune 2024N/A(2)3-8-005:002
0.0805058952018-0436AES Kuihelani Solar
Kaheawa Wind 1 (Repower)Ma’alaeaTerraform US30 MWTBDProject selected by utility2026967614-8-001-001-6001
Under negotiationNot yet availableKaheawa Wind 1
Pu’u Hao SolarKiheiAES20 MW + 80 MWh StorageTBDProject selected by utility202796790(2) 2-2-002-016Under negotiationNot yet availablePu’u Hao Solar
Pulehu Solar & StoragePulehuLongroad Energy 20 MW + 80 MWh StorageTBDProject selected by utility202796790(2) 2-5-001-003Under negotiationNot yet availablePulehu Solar & Storage
Kuihelani Solar Phase 2Ma’alaeaAES40 MW + 160 MWh StorageTBDProject selected by utility2027(2) 3-8-005-002Under negotiationNot yet availableKuihelani Solar Phase 2
Hawai‘i Island
Hale Kuawehi SolarWaimeaInnergex Renewable Energy, Paniolo Power30 MW + 120 MWh Storage0.8PUC Approved; ConstructingAugust 202496743(3)6-7-001:0250.136452018-0432Hale Kuawehi Solar
Puako SolarPuakoClearway Energy60 MW + 240 MWh StorageTBDProject selected by utility202896738(3)6-8-001:024
Under negotiationNot yet availablePuako Solar
Kaiwiki SolarHiloClearway Energy55 MW + 220 MWh StorageTBDProject selected by utility202896720(3) 2-6-009-049Under negotiationNot yet availableKaiwiki Solar
Hamakua Firm Renewable EnergyHonoka’aPacific Current60 MW + 30 MWh StorageTBDProject selected by utility203096727(3) 4-5-002-056
(3) 4-5-002-057
Under negotiationNot yet availableHamakua Firm Renewable Energy
Keamuku SolarWaikoloa VillageAES86 MW + 344 MWh StorageTBDProject selected by utility203096738(3) 6-8-002-008
(3) 6-8-002-010
Under negotiationNot yet availableKeamuku Solar
West Kaua‘i Energy ProjectKekahaAES and KIUC35 MW + 1500 MWh Storage22.7PUC Approved; Undergoing Environmental ReviewTBD96752Multiple, See DirectoryVaries2020-0218West Kauai Energy Project
All commercial operations dates are subject to change.


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 ReviewTBDN/A(2)3-8-003:023 2020-0132Waena Project Summary
HE Self-Build Projects

Project information will be updated as information becomes publicly available.