Project Helios

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.

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Community Engagement

As part of our engagement efforts with the local community surrounding the project, Manoa Energy actively sought input from residents. During these discussions, community members identified the need for lighting at a nearby public bus stop located close to the project entrance. Recognizing this concern, Manoa Energy has committed to installing the necessary lighting. This initiative is included in the construction schedule and is expected to be completed later this year.

Role of Manoa Energy

Beyond development, Manoa Energy is serving as the construction manager, overseeing execution up to commercial operation. Helios is a flagship example of Manoa’s end-to-end development approach—from acquisition and permitting to BESS procurement and construction oversight.