The World’s Most Advanced Grid-Scale Battery System Powers Up in Oahu, HI

Kapolei Energy Storage (KES)

In early 2024, Plus Power announced the operational launch of its Kapolei Energy Storage (KES) facility in Oahu, HI. The facility is the most advanced grid-scale battery energy storage system in the world, and it has provided a huge push forward in Hawaii’s transition to electric power. Goodfellow Bros. (GBI) is honored to have been a part of this project to support Hawaii’s objective to transition entirely from fossil fuels to renewable energy by 2045.

The project received initial approval from the Hawai’i Public Utilities Commission in May 2021, and it received unanimous support from the local Neighborhood Board and approval of its Conditional Use Permit-Minor from the City and County of Honolulu. The facility is located on roughly eight acres of land in Kapolei on the island of Oahu, situated in I-2 (Industrial) zoning outside the Tsunami Evacuation Zone – an optimal location for new energy infrastructure.

KES will help replace power lost from the AES coal-fired plant that closed in September 2022 and is expected to store 185 MW / 565 MWh of power harvested from solar, wind, and geothermal sources to provide clean power to Hawaiian Electric Company. It is interconnected at a critical existing Hawaiian Electric substation and is on track to provide about 10 percent of the power used during peak evening and overnight hours, providing both power and stability to the Hawaiian Electric grid on Oahu.

GBI’s scope of work for the Tesla Megapack 2XL project involved importing 9,200 cubic yards of coral, pouring 44 concrete pads using 2,384 cubic yards of concrete, and preparing the site for the installation of three-megawatt storage batteries. The project tasks also included clearing and grubbing, fabricating, and stripping forms, pouring the concrete foundation, and importing materials.

This project signifies a monumental leap forward in Hawaii’s pursuit of a sustainable energy future and for the broader renewable energy landscape. As KES begins its pivotal role in replacing fossil fuel-generated power with renewable sources, it underscores Hawaii’s commitment to environmental stewardship and the power of collaboration in driving meaningful change. With each concrete pad poured and each megawatt stored, we move closer to a future powered by innovation, resilience, and a shared vision of a brighter tomorrow for generations to come.

 

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