Gotion High-Tech Supports Japan's Largest Island Energy Storage Station, Officially Operational

On July 30, Okinawa Electric Power Company announced the commencement of commercial operations for the large-scale energy storage station at the Miyakojima Second Power Plant. With a capacity of 12MW/48MWh, this project is now the largest energy storage facility in Okinawa Prefecture and across Japan’s remote islands. The station is equipped exclusively with Gotion High-tech’s 3.42MWh liquid-cooled energy storage systems.

Addressing Miyakojima’s Energy Challenges

Miyakojima, operating as an isolated grid, has long depended on diesel generators, which face limitations due to fuel transportation difficulties and high costs. The growing adoption of renewable energy has further strained grid stability and safety. To tackle these issues, Gotion High-tech provided its advanced energy storage solution.

Advanced Technology for Reliable Performance

The system features Gotion’s self-developed lithium iron phosphate batteries, known for their high safety, ultra-long cycle life, excellent charge/discharge efficiency, and environmental benefits. Integrated with a proprietary battery management system (BMS), it enables real-time monitoring, overcharge/discharge protection, and stable operation. Additionally, the system incorporates multi-layered safety protections and an intelligent liquid-cooling system, improving energy efficiency by approximately 30% compared to traditional air-cooling methods. The modular containerized design ensures easy installation and maintenance, meeting Japan’s stringent safety, reliability, and environmental standards.

Enhancing Grid Stability and Renewable Utilization

Once operational, the storage station stores excess electricity generated by photovoltaic systems and diesel generators during the day, releasing it during nighttime peak demand. It provides up to 12MW of supplemental power—equivalent to a 15% increase in the island’s total supply capacity. This approach not only alleviates pressure on the isolated grid but also maximizes renewable energy usage, strengthening the island’s energy security and resilience.

A Model for Sustainable Energy Development

On-site, the neatly arranged energy storage systems blend seamlessly with Miyakojima’s scenic coastline, symbolizing the harmony between green energy and ecological preservation. As Okinawa’s largest operational energy storage station, the project sets a precedent for integrating renewable energy with environmental conservation. Given the similar energy challenges faced by many remote islands, Miyakojima’s success offers a replicable model for Okinawa’s broader energy transition, positioning the region as a leader in clean energy adoption and sustainable development.

Moving forward, Gotion High-tech will expand its presence in Japan’s energy storage market, exploring diversified applications such as renewable energy integration, frequency regulation, electricity spot markets, and virtual power plants. The company remains committed to delivering safe, efficient, and cost-effective solutions to support Japan’s energy transformation.