Vehicle-to-Grid (V2G) Technology in Japan: Turning EV Fleets
V2G enables electric vehicles (EVs) to not only draw electricity from the grid but also feed power back during peak demand or power outages—turning EVs into mobile energy storage units
For electrification to work at scale, energy solutions must be fast, reliable, and space-efficient. That's why Tokyo is expanding its EV infrastructure with citywide battery swapping.
In 2015, we started Japan's first demonstration project covering energy storage connected to the power grid in the Koshikishima, Satsumasendai City, Kagoshima. This project is still operating in a stable manner today. One feature of our grid energy storage system is that it utilizes reused batteries from EVs.
Increased generation of renewables requires various forms of energy storage to manage the issues associated with intermittency. Japan has, therefore, introduced two CAPEX subsidy schemes for grid-scale battery developers, excluding co-located projects.
One of the main reasons is the insufficient capacity of transmission lines. In response to this issue, Sumitomo Corporation aims to expand its business of storing energy nationwide in Japan by developing a large-scale energy storage platform that can compensate for this lack of transmission line capacity.
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