[Column Introduction] [Representative’s Blog] Three Essential Rules for Entering the Grid-Scale Battery Storage Business

Mitsuru Misawa, the representative of our firm, has published a blog post outlining key practical considerations for entering the grid-scale battery storage (BESS) business.

While more companies are exploring BESS as a natural extension of their solar PV experience, the business model is fundamentally different.
Grid connection studies, market operations, and responsibility boundaries all work differently from solar — proceeding with a solar-first mindset can easily lead to costly rework.

Drawing on his firsthand experience in legal and business support practice, the article explains the following three key rules:

  • Rule 1 Involve EPC contractors from the grid connection study stage
  • Rule 2 Select aggregators at the initial project stage, not just before commercial operation
  • Rule 3 Establish a PMO to centralize responsibility boundaries and project management

For each rule, the article also covers typical failure patterns seen in practice and specific comparison points when selecting an aggregator.

For more details, please see the blog post below.

Not Like Solar PV: Three Essential Rules to Avoid Failure in Grid-Scale Battery Storage Business (Mitsuru Misawa Blog)

Our column on grid-scale battery storage has also been widely read. Please check it out as well.

[Column] Japan Battery Storage Business Investment Guide 2025: Market Opportunities, Revenue Strategies, Regulatory Environment & Legal Practice

For consultations on business scheme design, contract drafting with EPC contractors, aggregators, and SIers, responsibility boundaries, and risk allocation in grid-scale battery storage projects, please contact us via our contact page.

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