In addition, HEI owns a financial institution serving Hawaii, American Savings Bank, and a clean energy and sustainability company, Pacific Current LLC.

Approximately 20,000 Hawaii residents are shareholders of HECO’s parent company, Hawaiian Electric Industries.

By 1914 HECO had started rural service to the windward side of the island and was marketing electric products like refrigerators and flat irons.

[5] During World War II HECO power plants linked to military bases, generating more than one million kilowatt hours of electricity each day.

The state's first reheat steam turbine generator went on line at Kahe on the west coast of Oahu.

[2] In 2013, HECO began working with Siemens to develop a self-healing grid in eastern Oʻahu and Waikīkī to ensure a reliable electrical supply.

Hawaii was experiencing high winds and was under a red flag warning when the wildfires broke out, which Hurricane Dora passing to the south may have contributed to.

[12] After the catastrophic and deadly wildfires, Hawaiian Electric's stock severely plummeted approximately 40%, its lowest since 2010, after it was facing a class action lawsuit that alleged that Maui’s devastating wildfires were caused by the utility’s energized power lines that were knocked down by strong winds, and that it chose not to shut off its power lines ahead of the Maui wildfires, despite knowing the safety risks of sparking a fire in those kind of conditions.

[13] On August 23, it was reported that Hawaiian Electric had no procedure in place for turning off the grid — a common practice in other fire-prone states.

[14] In July 2024, a tentative agreement was reached and Hawaiian Electric Industries, along with the State of Hawaii, Maui County, Kamehameha Schools and others would agree to pay thousands of plaintiffs and victims over $4 billion to settle the lawsuits.

[16] Hawai‘i Island set a record for HEI, generating a peak of 92.3% renewable power on April 25, 2023.

Totals include power purchased from independent plant owners of various types and distributed solar.