The Kaheawa Wind (KWP II) Battery Park – BESS is a 10,000kW energy storage project located in Maalaea, Hawaii, US.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was commissioned in 2012.


The Kaheawa Wind (KWP II) Battery Park – BESS was developed by First Wind Energy. The project is owned by First Wind Energy (100%).

The key applications of the project are electric supply reserve capacity – spinning, frequency regulation, ramping, renewables capacity firming and renewables energy time shift.

Contractors involved

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By GlobalData

First Wind Energy and Samsung SDI have delivered the battery energy storage project.

Additional information

The commissioning year of project is 2012. In 2018, Younicos has signed an agreement with TerraForm Power to upgrade Kaheawa Wind battery energy storage system. The agreement calls for Younicos to replace existing lead-acid batteries with advanced Samsung SDI lithium-ion batteries, which will be managed by Y.Q, Younicos’s proprietary control software.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.