• Hawaiian Electric reached a construction milestone on its Waena Battery Energy Storage System in Central Maui with the first six Tesla Megapacks installed.
• The 40-MW, 160-MWh standalone project is designed to shift renewable output to peak demand, supporting Maui grid reliability.
• Fifty-four Megapacks are planned; the project ranks among Hawaii’s largest battery systems.
• In-service is targeted for 2027; the project supports the utility’s 2045 goal for 100% renewable electricity.
• Maui County currently gets about 41% of electricity from renewables; the system will include grid-forming technology to improve stability.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. HEI - Hawaiian Electric Industries Inc. published the original content used to generate this news brief on September 21, 2026, and is solely responsible for the information contained therein.