A Florida-based battery energy storage provider is teaming with Idaho’s largest electric utility for a 200-MW/800-MWh battery energy storage system (BESS) project designed to support grid resiliency.
Prevalon Energy, a Mitsubishi Power Americas and EES joint venture, on Jan. 14 announced it had secured a contract with Idaho Power for the project, which will feature the advanced Prevalon High Density (HD) 511 system. The HD 511 Integrated Platform is a modular AC battery system, with 5.11 MWh per 20-feet ISO enclosure and a compact footprint. The system includes battery enclosures, inverters, medium-voltage transformers, and a highly configurable Energy Management System (EMS). The contract also includes a comprehensive long-term service agreement.
The deal was struck after Idaho Power initiated a competitive bidding process for battery energy storage, as the utility seeks to maintain a reliable supply of electricity during periods of peak demand. The utility said the BESS project will enable efficient storage of energy from intermittent renewable energy resources, and said it supports Idaho Power’s goal of providing 100% clean energy by 2045. The project is scheduled for full operation next year.
The utility said the BESS supports its plan to integrate more than 5 GW of wind and solar energy into its transmission system over the next 20 years.
Pivotal Project
Tom Cornell, president and CEO of Prevalon Energy, in an email to POWER said, “This project is pivotal in Idaho’s journey toward a more resilient and sustainable energy future. Prevalon Energy is proud to collaborate with Idaho Power to deliver innovative solutions that modernize energy infrastructure and enable long-term grid stability.”
Cornell added, “This continued collaboration reflects the dedication and expertise of our exceptional team at Prevalon. We are proud to be recognized as a trusted partner with extensive project experience in the dynamic field of battery energy storage. We value our partnership with Idaho Power and are excited to further support their long-term goals with our advanced integrated battery energy storage solutions, ensuring a stable and reliable energy grid for their customers.”
Prevalon Energy and Idaho Power in May of last year announced a similar deal for a 328-MWh BESS. The 800-MWh project announced Tuesday will be the largest to date in Idaho, surpassing the 150-MW/600-MWh facility in Kuna, near Boise. Aypa Power signed a 20-year agreement with Idaho Power for that project two years ago, and closed a $323 million financing package for the system in 2024. Aypa Power has said it plans to begin operating that project later this year.
Prevalon Energy was spun out of Mitsubishi Power Americas last year. The company said it has a pipeline of more than 30 projects, representing more than 4 GWh of energy storage.
—Darrell Proctor is a senior for POWER.
