{"id":14320,"date":"2025-07-31T09:00:59","date_gmt":"2025-07-31T00:00:59","guid":{"rendered":"https:\/\/www.rts-pv.com\/en\/?post_type=blogs&p=14320"},"modified":"2025-07-31T09:06:08","modified_gmt":"2025-07-31T00:06:08","slug":"grid-scale-battery-applications-in-japan-jump-tenfold-to-113-gw","status":"publish","type":"blogs","link":"https:\/\/www.rts-pv.com\/en\/blogs\/14320\/","title":{"rendered":"Grid-Scale Battery Applications in Japan Jump Tenfold to 113 GW"},"content":{"rendered":"
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Japan Solar Update: No.159 (July 28 ~ Aug 1, 2025)\u00a0<\/h6>\n<\/div>\n
\"Storage<\/h6>\n<\/div>\n<\/div>\n

As of March 2025, grid connection study applications for grid-scale battery storage in Japan reached 113 GW, a tenfold increase from May 2023. Contract applications totaled around 12 GW. In response, policymakers are advancing reforms to streamline grid access and accelerate the integration of storage systems.<\/p>\n

 <\/p>\n

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<Key points><\/span><\/span><\/span><\/strong><\/p>\n

    \n
  • As of the end of March 2025, applications for connection assessment for approx. 113 GW of grid-scale storage batteries had been received nationwide, and about 12 GW having applied for connection contracts. This represents a roughly tenfold increase in connection assessment applications compared to the end of May 2023<\/li>\n
  • To enable the prompt grid connection of grid-scale storage batteries, the policy is to further examine institutional measures such as strengthening discipline in grid access procedures and rationalizing connection rules<\/li>\n<\/ul>\n<\/div>\n

     <\/p>\n

    \n

    Applications received for connection assessment and connection contracts of grid-scale storage batteries (as of end Mar. 2025)<\/strong><\/p>\n<\/div>\n

    \n

    Connection assessment nationwide:<\/strong> 11.89 GW (as of end May 2023) \u2192 112.85 GW (as of end Mar. 2025)<\/span><\/strong><\/p>\n

    Connection contracts nationwide:<\/strong> 1.12 GW (as of end May 2023) \u2192 12.06 GW (as of end Mar. 2025)<\/span><\/strong><\/span><\/p>\n

     <\/p>\n<\/div>\n

     <\/p>\n

     <\/p>\n

     <\/p>\n

    \n

    Toward prompt interconnection of grid-scale storage batteries<\/strong><\/p>\n<\/div>\n

     <\/p>\n

     <\/p>\n

    \n
      \n
    • While further expansion of deployment is expected, a key issue is the prolonged time required for grid connection due to a large number of applications for connection assessment and related factors<\/li>\n
    • In some cases of grid connection, grid reinforcement is required on the forward power flow (charging) side, leading to taking more time to grid connection<\/li>\n<\/ul>\n<\/div>\n

       <\/p>\n\n\n\n\n\n\n
      Matters to be considered<\/strong><\/td>\nOverview of considerations<\/strong><\/td>\n<\/tr>\n
      Strengthening discipline in grid access procedures<\/strong><\/td>\n\n
        \n
      • Initiatives are needed to reduce connection assessments for projects with low feasibility<\/li>\n
      • Efforts<\/span> are also necessary to prevent ‘grid capacity hoarding’<\/span> so that grid-scale storage batteries with high project feasibility can be connected to the grid quickly<\/li>\n<\/ul>\n

        and so on<\/p>\n<\/td>\n<\/tr>\n

      Rationalizing connection rules for grid-scale storage batteries<\/strong><\/td>\n\n

      Consider specific connection rules for grid-scale storage batteries, referring to measures such as non-firm connections,<\/span> and real-time control being implemented in the Hokkaido area ahead of other areas<\/p>\n

      and so on<\/p>\n<\/td>\n<\/tr>\n

      Promoting initiatives that enable efficient interconnection of both grid-scale storage batteries and general demand<\/strong><\/td>\n\n

      In parallel with the revision of connection rules, it is necessary to introduce a framework that enables the smooth grid interconnection of both grid-scale storage batteries and general demand by maximizing the use of existing electric grids, taking advantage of the flexibility of grid-scale storage batteries<\/span> under the current rules<\/p>\n

      and so on<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

       <\/p>\n

      Figure 3 Status of applications received for connection assessment and connection contracts of grid-scale storage batteries<\/span><\/p>\n

      Source: Materials of the 3rd meeting of the Working Group on the Next-Generation Electric Grid (June 27, 2025), compiled by RTS Corporation <\/span><\/p>\n","protected":false},"featured_media":14427,"template":"","blogs_category":[49],"class_list":["post-14320","blogs","type-blogs","status-publish","has-post-thumbnail","hentry","blogs_category-pv-market-size-installation-volume"],"acf":[],"yoast_head":"\nGrid-Scale Battery Applications in Japan Jump Tenfold to 113 GW | RTS Corporation<\/title>\n<meta name=\"description\" content=\"Based upon over 40 years of our experiences and accumulated knowledge in PV,RTS Corporation has been providing in RTS Corporation is a leading PV industry \/ market consultingcompany and has been supporting the growth of the PV industry for nearly 40 years.We provide an optimal consulting service for each client interested in the PV business.\u3000Weekly PV news is available at RTS PV Blog.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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