This landmark project demonstrates how energy storage can empower island nations to achieve energy independence while creating economic opportunities. As battery costs continue falling 8% annually (BloombergNEF), the Cook Islands' initiative provides a replicable model for. . Summary: The Cook Islands are set to launch their largest renewable energy storage project, combining solar power with cutting-edge battery technology. With 85%. . The Cook Islands in the Pacific will host a 5. 6MWh lithium-ion battery energy storage system for the integration of renewables, in a project funded by the Asian Development Bank, European. Energy self-sufficiency has been defined as total primary energy production. . With battery storage, these projects supply 95 - 100% of electricity from renewable sources. Installation of solar PV is currently being Aitutaki has a population of approximately 1,800, and remaining islands are sparsely populated. The Cook Islands' unique environment creates specific energy needs: "Our hotel's energy costs dropped 35% after installing storage cabinets," reports a. . The three Battery Energy Storage Systems (BESS) are located at Te Aponga Uira (TAU) Power Station up the Avatiu Valley, Rarotonga Airport West, and Airport South.