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. . HONOLULU, July 22, 2025 – The new Hoohana Solar project started commercial operations on July 11, 2025, marking the completion of the first stage of grid-scale renewable energy systems brought online through a competitive bidding process initiated by Hawaiian Electric in 2018. Collectively, these. . To achieve these mandates, the state aims to rely heavily on battery energy storage systems to provide backup power when intermittent sources such as solar and wind are insufficient or unavailable. Hawaii bid adieu to its last coal plant on September 1, 2022. This strategic shutdown eliminated 180. . The KES battery project, located on 8 acres of industrial land on the southwest side of Oahu near Honolulu, uses 158 Tesla Megapack 2 XL lithium iron phosphate batteries, each roughly the size of a shipping container. A 185 MW/565 MWh battery energy storage system (BESS) recently started operating in Oahu, Hawaii, providing. .
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