AES and KIUC Make History with World’s Largest Solar + Storage System

Written By: Jen Neville
January 9, 2019

Solar + Storage

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Manish Kumar, Managing Director, Energy Storage, AES speaking on Panel Discussion: Front-of-the-Meter Project Development and Finance. Much of the storage development to date in the US has been in grid-connected storage. But even as procurements accelerate and applications expand the competition for projects has become fierce. This panel will examine the current FTM market, including emerging development and finance challenges. View the agenda here


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The AES Corporation and Kaua’i Island Utility Cooperative recently inaugurated the largest operational solar and storage system in the world. The project, owned and operated by AES Distributed Energy, consists of a 28 MW solar photovoltaic and a 100 MWh five-hour duration energy storage system, and would help Hawaii meet its goal of reaching 100 percent renewable energy by 2045. The new PV peaker would deliver roughly 11 percent of Kaua’i’s power, making the island more than 50 percent powered by renewables.

“Kaua’i has adopted an ambitious renewables mandate and the Lāwa’i project will help reduce its reliance on fossil fuels while generating clean, reliable and affordable energy,” stated Andrés Gluski, AES President and Chief Executive Officer. “As a supplier of power to Hawaii for more than 25 years, we are honored to have been chosen by KIUC to help demonstrate its commitment to the state’s vision of a cleaner energy future. We believe this project is a significant step toward ushering in the wider era of firm renewables.”

By combining solar power with battery-based energy storage, intermittent renewable generation could be converted into safe, reliable and higher-quality power. The fully integrated Lāwa’i project would eliminate the use of 3.7 million gallons of diesel annually while supporting three vital scenarios in power distribution.

It would allow for solar generation to supply the grid while charging the battery system, dispatched power would be stored in the battery system to the grid during peak demand periods and could also dispatch solar and battery power simultaneously to answer spikes in demand in addition to supporting the grid through provision of ancillary services.

Declining costs of solar, and use cases such as this project, would make similar systems the smartest choice to leverage abundant energy from renewables in many other parts of the world. The company is currently constructing an additional 19.3 MW solar + 70 MWh battery energy storage facility for KIUC located on leased land from the U.S. Department of Defense within the Pacific Missile Range Facility – Barking Sands Naval Base, and also continuing to develop firm renewables projects in Hawaii and elsewhere with more projects to be announced in 2019.

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