This document presents the meeting materials from the first FY2025 Stationary Energy Storage System Expansion Study Group held by the Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry, focusing on cybersecurity measures for grid-scale battery storage projects and profitability evaluation of commercial/industrial energy storage systems.
The study group was held on July 22, 2025, to examine challenges and measures for expanding stationary energy storage systems. The meeting discussed two main themes regarding energy storage systems that play a crucial role in establishing renewable energy as a primary power source.
Cybersecurity for Grid-Scale Battery Storage Projects
Mitsubishi Research Institute conducted a detailed analysis of cybersecurity risks and countermeasures surrounding grid-scale battery storage projects. As digitalization of power systems advances, the risk of battery storage systems becoming targets of cyberattacks is increasing, making the implementation of appropriate security measures urgent. The Agency for Natural Resources and Energy has organized discussion points regarding the necessity of developing industry-standard security guidelines and support measures for operators.
Profitability Evaluation of Commercial/Industrial Energy Storage Systems
Mitsubishi Research Institute organized various use cases for commercial and industrial energy storage systems and evaluated their respective profitability. Various applications are being considered, including peak shaving, BCP measures, renewable energy self-consumption, and demand response. The Agency for Natural Resources and Energy presented discussion points on policy directions and support systems to improve economic viability, recognizing that high initial investment costs remain a barrier to widespread adoption.
Future Initiatives
The study group confirmed the need for comprehensive policy packages including technology development support, regulatory relaxation, and financial support for further expansion of energy storage systems. In particular, establishing business models that balance contribution to grid stabilization with business profitability has been positioned as an important challenge.
The article demonstrates the importance of the role stationary energy storage systems play in achieving carbon neutrality and the necessity of public-private partnership initiatives for their widespread adoption.