Clean Energy Facts

About Our Fuel Mix

Generation of renewable energy continued to increase in 2016

In 2016, nearly 26 percent of the energy used by customers of the Hawaiian Electric Companies came from renewable energy resources. These results, presented in our Renewable Portfolio Standard report, include power generated by customer-sited, grid-connected technologies, such as photovoltaic (PV) systems.

The following information focuses on the mix of fuels used to generate the electricity produced by each of our three utilities and the electricity purchased from independent power producers. It excludes energy produced by customer-sited PV systems.


On Oahu

In 2016, nearly 11 percent of the electricity generated by Hawaiian Electric, contracted independent power producers, and small feed-in tariff facilities was fueled by renewable resources, including solid waste, wind, solar, and biofuel energy.

As of June 1, 2017, progress continued on several renewable energy projects on Oahu:

  • Eleven feed-in tariff PV projects, totaling over 10 megawatts (MW), went into service in 2016.
  • The 27.6-MW Waianae Solar project went into service mid-January 2017.
  • The 8-MW biofueled Honolulu International Airport Emergency Power Facility was undergoing testing.
  • The 50-MW Schofield Generation Station, powered by a biofuel blend, is scheduled to be in service by the end of March 2018.
  • The 24-MW Na Pua Makani wind farm in Kahuku is scheduled for completion by the third quarter of 2019.
  • Power purchase agreements were submitted to the Public Utilities Commission (PUC) for three facilities, Kawailoa Solar, Lanikuhana PV, and Waipio PV, which range in size between 14.7 MW and 49 MW.
  • A proposal for West Loch PV, a 20-MW facility we plan to build in conjunction with the Department of the Navy, was also submitted to the PUC.
  • Small feed-in tariff PV projects are under development.

On Hawaii Island

In 2016, over 40 percent of the electricity generated by Hawaii Electric Light, contracted independent power producers, and small feed-in tariff facilities was fueled by renewable resources, including geothermal, wind, hydro, and solar energy.

In addition to our hydroelectric plants, Puueo 1, Puueo 2, Waiau 1, and Waiau 2, Hawaii Island residents benefit from renewable energy produced by independent power producers:

  • Puna Geothermal Venture facility
  • Two wind farms: Hawi Wind Farm and Pakini Nui
  • Wailuku River Hydroelectric and several other smaller hydro plants

Small feed-in tariff projects are under development.


In Maui County

In 2016, nearly 25 percent of the electricity generated by Maui Electric, contracted independent power producers, and small feed-in tariff facilities was fueled by renewable resources, including wind, solar, biomass, biofuel, and hydro energy.

As of June 1, 2017, progress continued on several PV projects in Maui County:

  • The 2.87-megawatt (MW) Kuia Solar facility is scheduled for completion by the third quarter of 2017.
  • The 2.87-MW South Maui Renewable Resources PV facility is scheduled for completion by the third quarter of 2017.
  • Small feed-in tariff PV projects are under development.

The following tables show the mix of fuels used to generate electricity for delivery to customers in each of our service areas in 2016.


Fuel Mix in Our Service Areas - 2016 Calendar Year*

Fuel Sources Hawaiian Electric
(Island of Oahu) 
Hawaii Electric Light
(Island of Hawaii) 
Maui Electric
(Islands of Maui, Molokai, and Lanai) 
Oil 67.90% 59.50% 75.17%
Coal 21.42% 0 0.03%
Biofuel 0.54% 0 0.08%
Biomass 0 0 0.37%
Geothermal 0 22.70% 0
Hydro 0 4.72% 0.08%
Solar 0.77% 0.36% 0.77%
Solid Waste 6.01% 0 0
Wind 3.36% 12.72% 23.50%
TOTAL: 100% 100% 100%
Total from Renewable Resources10.68%40.50%24.80%

*Percentages are based on the amount of electricity generated by the Hawaiian Electric Companies and purchased from independent power producers in 2016, excluding energy produced by customer-sited PV systems.