Project Westwood in Taiwan,

Project Helios in Hokkaido, at 50MW and 104MWh is one of Japan’s earliest BESS projects under construction.

Location: Sapporo City, Hokkaido

Capacity: 50 MW / 104 MWh

Operating life: ~25 years

Technology: Lithium Iron Phosphate (LFP)

Status: Under Construction

Target COD: End of 2025

Overview

Project Helios is one of Japan’s earliest and most significant utility-scale Battery Energy Storage System (BESS) developments, currently under construction in Sapporo City, Hokkaido. With a capacity of 50 MW / 104 MWh, Helios plays a pioneering role in contributing to grid stability by absorbing excess electricity during peak generation hours and enhancing renewables integration in the region.

Development

Manoa Energy acquired the Helios site at a pre-RTB stage and has led the project through all critical development milestones:

• Secured all construction and grid connection permits
• Contracted EPC services and procured the full BESS system
• Coordinated with utilities, neighboring infrastructure projects, local community and key stakeholders
• Managed grid impact studies and permitting of the self-transmission line

The delivery of all battery units was recently completed, and construction is underway for both the main site and the self-transmission line infrastructure.