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Plus Power's 565MWh 'shock absorber' BESS in Hawaii comes online

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Plus Power's 565MWh 'shock absorber' BESS in Hawaii comes online


It comprises 158 Tesla Megapacks configured into 135MW/540MWh for capacity and energy use cases and another 50MW/25MWh of additional capacity for ‘fast frequency response’ to help keep the grid stable.

Brandon Keefe, Plus Power’s executive chairman claimed: “It is the first time a battery has been used by a major utility to balance the grid: providing fast frequency response, synthetic inertia, and black start. This project is a postcard from the future – batteries will soon be providing these services, at scale, on the mainland.” 

The announcement said it will be acting “…as an electrical “shock absorber” (a function) often served by combustion-powered peaker plants”.

Another major energy storage project which has been described as such a “shock absorber” is the 850MW/1680MWh Waratah Super Battery in Australia which is being deployed by system integrator Powin.

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KES, Hawaii’s biggest energy storage project, was approved in May 2021 and financing for it was achieved by Plus Power six months later.

Customer-sited solar power has become so abundant that Hawaiian Electric, the main utility in Hawaii, needs to regularly curtail – i.e. pay owners to turn off – utility-scale solar and wind to keep the electricity system in balance. 

The utility’s modelling has forecast that thanks to the KES project it will be able to reduce curtailment of renewables by 69% over the first five years of operation, integrate 10% more new utility-scale renewables than previously modelled, and allow for continued growth in customer-sited solar. It is also expected to reduce consumer electric bills by an average of US$0.28 per month over its 20-year contract life.

The utility has been busy progressing the US island state’s clean energy and energy storage development goals, starting negotiations with 2.1GWh of energy storage projects in December 2023 and in May unveiling a long-term renewables plan which included adding add more than 3.7GW of hybrid solar, energy storage and firm renewables by 2030.

Plus Power said that by June 2024 it will have some 1,325MW/3,500MWh of energy storage online across the US, including projects which were part of a US$1.8 billion fundraise it concluded in November, the largest seen in energy storage in 2023.

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Energy-Storage.news’ publisher Solar Media will host the 5th Energy Storage Summit USA, 19-20 March 2024 in Austin, Texas. Featuring a packed programme of panels, presentations and fireside chats from industry leaders focusing on accelerating the market for energy storage across the country. For more information, go to the website.



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Arkansas vs. Hawaii – First round NCAA tournament extended highlights

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Arkansas vs. Hawaii – First round NCAA tournament extended highlights


Men’s Basketball

March 19, 2026

Arkansas vs. Hawaii – First round NCAA tournament extended highlights

March 19, 2026

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Watch the highlights from No. 4 Arkansas and No. 13 Hawaii’s matchup in the first round of the 2026 men’s NCAA tournament.



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Hawaii takes on elite Arkansas team in today’s NCAA opener | Honolulu Star-Advertiser

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Hawaii takes on elite Arkansas team in today’s NCAA opener | Honolulu Star-Advertiser




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HECO restores power to 1,500 customers across Hawaii; 3,200 still out | Honolulu Star-Advertiser

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HECO restores power to 1,500 customers across Hawaii; 3,200 still out | Honolulu Star-Advertiser


About 3,230 customers remained without power across the state today as crews worked to restore service following a powerful Kona-low storm, according to Hawaiian Electric Company.

The utility said more than 1,500 customers in Maui County, Hawaii island and Oahu had power restored overnight, but warned that remaining outages could take longer to fix due to hazardous and complex conditions.

On Hawaii island, the hardest-hit area, about 2,400 customers were still without electricity as of 9 a.m. Outages were reported in Kapoho, Royal Hawaiian Estates, Mountain View, Hawaiian Paradise Park, Orchid Isle Estates, Wright Road and parts of North and South Kona. Crews continued damage assessments and tree clearing, with downed trees and debris slowing access to some areas, particularly in Puna.

In Maui County, about 400 customers remained without power after roughly 600 were restored overnight. Most customers in East Maui have had service restored, but about 70 were told to prepare for extended outages that could last several more days, depending on weather conditions.

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On Oahu, about 330 customers were still without power in scattered pockets after nearly 250 were restored. Crews were working on individual service lines to restore electricity to neighborhoods.

Hawaiian Electric said restoration timelines remain uncertain until inspections are completed and repairs are made safely.

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The utility urged the public to stay at least 30 feet away from downed power lines, which may still be energized, and to call 911 if someone is injured. Customers were also advised to check their breakers if their neighborhood has power but their home does not.




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