Clean Energy Facts

About Our Fuel Mix

Renewable energy resources continue to increase in 2015 

In 2015, 23.2 percent of the energy used by customers of the Hawaiian Electric Companies came from renewable energy resources, including wind, solid waste, geothermal, hydro, solar, and biofuel energy. This already exceeds our state's 2015 clean energy goal of 15 percent. These results, presented in our Renewable Portfolio Standard report, include power generated by customer-sited, grid-connected technologies, such as photovoltaic systems.


On Oahu  

On Oahu, nearly 10 percent of the electricity generated in 2015 by Hawaiian Electric, contracted inde­pendent power producers, and small feed-in tariff facilities was fueled by renewable resources, including solid waste, wind, biofuel, and solar energy. This percentage does not include customer-sited, grid-connected renewable energy systems.

Progress continues on several renewable energy projects: 

  • The 8-MW biofueled Honolulu International Airport Emergency Power Facility, expected to be completed by the end of 2016
  • The 27.6-MW Waianae Solar project, under construction by Eurus Energy for completion in December 2016
  • The 50-MW Schofield Generation Station, powered by a biofuel blend, scheduled to be in service by late 2017
  • The 24-MW Na Pua Makani wind farm in Kahuku, scheduled for completion by the first quarter of 2018
  • Small feed-in tariff solar projects under development

Moving forward, we plan to issue one or more requests for proposals for more renewable energy projects.


On Hawaii Island

On Hawaii Island, more than 37 percent of the electricity generated in 2015 by Hawaii Electric Light and contracted independent power producers was fueled by renewable resources. This percentage does not include customer-sited, grid-connected renewable energy systems.

In addition to our hydroelectric plants Puueo I, Puueo 2, Waiau 1, and Waiau 2, Hawaii Island residents benefit from energy produced by independent power producers: the Puna Geothermal Venture facility; two wind farms, Hawi Wind Farm and Pakini Nui; and five hydroelectric plants, Kaloko Tank 2, Palm Valley Farms, Wailuku River Hydroelectric, Waimea Treatment Facility, and Wenko Energy.

  • Small feed-in tariff solar facilities are also contributing renewable energy to our grid. Additional feed-in tariff projects are under development.

In Maui County

In Maui County, more than 26 percent of the electricity generated in 2015 by Maui Electric, contracted independent power producers, and small feed-in tariff facilities was fueled by wind, biomass, hydro, solar, and biofuel energy. This percentage does not in­clude customer-sited, grid-connected renewable energy systems. 

Progress continues on several solar energy projects: 

  • The 2.87-MW solar farm, under construction by Kuia Solar for completion by mid-2017
  • The 2.87-MW solar farm, being constructed by South Maui Renewable Resources for completion by mid-2017
  • The proposed 3.87-MW Molokai Island Energy solar farm, to be developed by Half Moon Ventures, LLC
  • Small feed-in tariff solar projects under development

Moving forward, we plan to issue one or more requests for proposals for energy storage, demand response, and firm generating capacity.

We'll continue our efforts to increase the integration of more renewable energy resources while delivering safe, reliable, and stable power to our customers.

The following table shows the mix of fuels used to generate electricity for delivery to our service areas in 2015, other than the energy produced by customer-sited grid-connected systems.


Fuel Mix in Our Service Areas - 2015 Calendar Year*

Fuel SourcesHawaiian Electric
(Island of Oahu)
Hawaii Electric Light
(Island of Hawaii)
Maui Electric
(Islands of Maui, Molokai, and Lanai)
Oil 71.1% 62.5% 73%
Coal 19.1% 0 0.9%
Biofuel 0.7% 0 0.1%
Biomass 0 0 2.6%
Geothermal 0 20.2% 0
Hydro 0 5.5% 0.8%
Solar 0.6% 0.2% 0.7%
Solid Waste 5.4% 0 0
Wind 3.1% 11.6% 22%
TOTAL: 100% 100% 100%
Total from Renewable Resources9.8%37.5%26.1%

*Percentages are based on the amount of electricity generated by the Hawaiian Electric Companies and purchased from independent power producers in 2015, excluding energy produced by rooftop solar systems. Percentages may not add up to 100% due to rounding.