#Japan #Okinawa #DG Capital #Digital Grid Router #Zero-Carbon Island

Introduction

In a major leap toward embracing sustainable energy solutions, DG Capital Group has achieved the certification for its pioneering Digital Grid Router (DGR) from Kyushu Electric Power Distribution. This certification, which was obtained in March 2025 following rigorous testing, signifies a breakthrough in energy technology, particularly for the remote Okinawa Island.

About the Digital Grid Router (DGR)

The Digital Grid Router is an innovative inverter technology that harnesses grid-forming capabilities with autonomous control. By integrating the concept of inertia into the electrical grid, the DGR can substantially contribute to stability while enhancing the penetration of renewable energy sources.

The Journey to Certification

In order to secure the certification, DG Capital Group meticulously conducted a series of system connectivity tests. These tests evaluated power quality, protective coordination, and measures to prevent unintended independent operation. With the successful submission of these test results to Kyushu Electric Power Distribution, the company was granted certification for the DGR.

Upcoming Projects

DG Capital Group, in partnership with the local energy company Erabu Yuli Power, plans to gradually implement a total of 71 DGR units with an overall capacity of 1420 kW on the island by the fiscal year 2027. The first phase, involving the installation of 16 DGR units (320 kW) at Ikina town hall and the Okinawa culture hall, is expected to begin grid connection in June 2025.

Impact on the Local Community

The mayor of Chinan Town, Takashi Imai, voiced optimism regarding this project. He acknowledged that the island has had limited ability to utilize its abundant renewable energy potential due to regulation constraints on the output of the local thermal power plant. He expressed hope that with the introduction of DGR, this challenge could be overcome, facilitating a greater influx of renewable energy and establishing Okinawa Island as a model for future energy designs worldwide.

Environmental Endeavors: Zero-Carbon Island Erabu

Okinawa Island has been recognized as a leading area for decarbonization by the Ministry of the Environment. DG Capital Group is firmly committed to this vision, focusing on creating a self-sustaining and resilient local microgrid that maximizes local renewable energy generation and consumption. The gradual rollout of DGR technology is a crucial step in achieving this goal.

Future Expansion Plans

The DGR will not only serve the local needs but is also poised for broader applications. DG Capital Group, in collaboration with Takashima Co., Ltd., has established DG Takashima, which will manufacture DGRs for distribution both domestically and globally. The goal is to replicate the innovative island model across Japan and beyond.

Conclusion

With the successful certification of the Digital Grid Router and ambitious plans for its implementation, DG Capital Group is at the forefront of revolutionizing renewable energy management. This initiative is set to foster greater energy independence and resiliency in Okinawa Island while establishing a benchmark for similar sustainable energy projects worldwide.