OWC delivers Red Flag Technical Due Diligence for Energy Storage Project (BESS) in Japan

Project title: OWC delivers Red Flag Technical Due Diligence for Energy Storage Project (BESS) in Japan

Client: confidential

Sectors: Energy Storage

Location: Japan

Top-Line Services:

Technical Due Diligence
Owner’s Engineering and Project Services
Technical studies
Environmental & Consents
Asset Management
Energy Storage

Project summary:

OWC was engaged by an investment firm to deliver a Red Flag Technical Due Diligence (TDD) assessment for the potential acquisition of a Battery Energy Storage System (BESS) project in Japan. The project was under construction at the time of the assessment, with commercial operations expected to commence in the near term. The due diligence assessment was commissioned during a critical pre-acquisition phase and aimed to identify and quantify any material technical, contractual, and financial risks that could impact the investment decision.

Project Challenges

Working under a tight transaction timeline, the client needed an independent assessment of the key technical and contractual risks associated with the BESS project before proceeding with a potential acquisition.

With most of the Virtual Data Room (VDR) documentation available only in Japanese, it was important for the client to work with a multidisciplinary due diligence team capable of identifying and assessing risks across technical, contractual and commercial domains.

Our Solutions

OWC’s Scope included:

Technical Due Diligence
Project Services: Review of site conditions, design and EPC contract, grid connection, financial model assumptions
Technical studies: Assessment of geotechnical and foundation design, seismic and liquefaction exposure analysis
Battery Energy Storage System (BESS) consultancy and technology advisory, independent review of compliance with Japan’s high-voltage grid standards and warranty terms
Environmental & Consents
Asset Management
Energy Storage

Our Value

Enabled a confident investment decision by providing a clear, evidence-based assessment of technical, contractual and commercial risks, supported by risk ratings, root-cause analysis and practical mitigation recommendations.

Identified a seismic and ground-subsidence risk that had not been fully evaluated and mitigated during project development, ensuring the client had full visibility of the exposure before completing the acquisition.

Our OWC Japan team turned a complex technical risk into an actionable commercial input by quantifying potential earthquake-related losses, allowing the client to benchmark insurance costs and make informed risk-transfer decisions.

Strengthened the client’s negotiating position by highlighting key risk exposures and their potential impact, supporting informed discussions during the Share Purchase Agreement (SPA).

Technical Due Diligence

Having a comprehensive view of your project is key for success. As your dedicated renewable energy consultants, we’ll provide an expert objective perspective to guide decision-making.

Owner’s Engineering

Mitigate risks across your renewable energy project. We can work with you to foresee every aspect of your project, eliminating the risk of delay and unplanned costs.

Technical Studies

Our technical studies can be applied at any stage of a project or asset’s lifecycle, supporting decision-making and maximising your performance.

Environment and Consents

OWC’s Environment and Consent team works closely with client project teams to manage the interface between engineering and environment, advising on project development, permitting and planning for offshore and onshore renewable projects.

Offshore Wind Asset Management

Receive Expert Offshore Wind O&M Support Across Your Entire Project OWC provides end-to-end Asset Management solutions for renewable energy assets – offshore wind, onshore wind, solar PV, and BESS. Managing your offshore wind assets can feel like a complicated task, particularly when trying to protect your investments while maximising performance. We combine profound technical expertise, […]

Energy Storage

Our veteran renewable energy consultants can work on individual battery energy storage systems (BESS), or joint-market projects requiring specialist technical insight.