Project Overview

The 142 MW / 568 MWh Kapolei Energy Storage II facility will provide energy and capacity services to the Hawaiian Electric grid, enhancing grid reliability and accelerating the integration of locally produced renewable energy. The project will abide by the most stringent design and cutting-edge safety standards to ensure the project maximizes benefits to HECO, the Kapolei area, and the island of Oahu.

Construction of the KES II facility is anticipated to start in 2029. The 2030 completion of the facility will ensure that Hawaiian Electric meets its reliability needs and reaches its goals to achieve 100 percent renewable energy generation by 2045.

Situated along a major transmission corridor and interconnecting at the CEIP substation, the site’s location within an industrial zone minimizes environmental impacts. The KES II site is well suited for new energy infrastructure as it is located next to the existing KES I project and is complementary to the surrounding land uses.

Proposed Site Layout