METI to tighten battery connection rules in FY2026; Hokkaido-origin wall-mounted solar mounts turning walls into power assets become a new choice for renewable energy implementation
Yabushita Enesys's wall-mounted solar mount 'S-LINE' is expanding as a solution to space constraints for renewable energy, amidst METI's upcoming 2026 strict rules for grid battery connections.
📋 Article Processing Timeline
- 📰 Published: April 6, 2026 at 23:00
- 🔍 Collected: April 6, 2026 at 14:30
- 🤖 AI Analyzed: April 21, 2026 at 01:46 (347h 15m after Collected)
Yabushita Enesys Co., Ltd. (Headquarters: Chuo-ku, Sapporo City, Hokkaido; President and CEO: Tadahiro Mori; 17 group companies) is rolling out 'S-LINE', a wall-mounted solar mounting system that transforms unused building walls into power generation assets. S-LINE is increasingly being adopted not only in factories, warehouses, and office buildings but also in the housing sector as a new option that makes wall-mounted solar viable—which previously struggled to spread—by reviewing the cost structure rather than relying solely on power generation volume.
The Ministry of Economy, Trade and Industry (METI) plans to tighten grid connection rules for grid-scale batteries, which are essential for the stable use of renewable energy, as early as FY2026. Setting maximum limits on the number of applications and requiring the submission of documents regarding installation locations, it is expected that in the future, in addition to institutional aspects, questions like 'can it actually be installed?' and 'is it commercially viable?' will be asked more strictly than just presenting a simple equipment plan.
Furthermore, at the operational sites of companies and local governments, installation costs and the lack of installation space are emerging as barriers to introduction. Our S-LINE is expected to become a new choice for renewable energy implementation that solves these issues.
Grid Battery Connection Scale to Expand 3 to 5 Times by 2030
In Japan, the introduction of renewable energy is accelerating toward the realization of carbon neutrality by 2050. On the other hand, since the amount of power generated by renewable energy fluctuates greatly depending on the weather and other factors, adjusting the power supply-demand balance and ensuring grid stability have become major challenges. In recent years, there are increasing cases where daytime supply exceeds demand, and 'output control' (curtailment), which temporarily suspends the acceptance of generated electricity, occurs frequently in various regions.
According to the Agency for Natural Resources and Energy, as of September 2025, there were 111 battery storage power stations, with a connection scale of about 500,000 kilowatts, representing an approximately 5-fold increase compared to the same period of the previous year. The connection scale is projected to expand 3 to 5 times by 2030. Increased power demand due to the spread of data centers and AI is also boosting battery investment.
3 Features of the Wall-Mounted Solar Mount 'S-LINE'
◆ Utilizes Building Walls
Conventionally, solar power generation has generally been installed on rooftops. However, in actual practice, there have been many cases where companies 'cannot secure sufficient installation area on the roof', 'have no room to place new equipment on the premises', and furthermore 'are forced to abandon introduction due to roof load limits or structural constraints'.
Such...
The Ministry of Economy, Trade and Industry (METI) plans to tighten grid connection rules for grid-scale batteries, which are essential for the stable use of renewable energy, as early as FY2026. Setting maximum limits on the number of applications and requiring the submission of documents regarding installation locations, it is expected that in the future, in addition to institutional aspects, questions like 'can it actually be installed?' and 'is it commercially viable?' will be asked more strictly than just presenting a simple equipment plan.
Furthermore, at the operational sites of companies and local governments, installation costs and the lack of installation space are emerging as barriers to introduction. Our S-LINE is expected to become a new choice for renewable energy implementation that solves these issues.
Grid Battery Connection Scale to Expand 3 to 5 Times by 2030
In Japan, the introduction of renewable energy is accelerating toward the realization of carbon neutrality by 2050. On the other hand, since the amount of power generated by renewable energy fluctuates greatly depending on the weather and other factors, adjusting the power supply-demand balance and ensuring grid stability have become major challenges. In recent years, there are increasing cases where daytime supply exceeds demand, and 'output control' (curtailment), which temporarily suspends the acceptance of generated electricity, occurs frequently in various regions.
According to the Agency for Natural Resources and Energy, as of September 2025, there were 111 battery storage power stations, with a connection scale of about 500,000 kilowatts, representing an approximately 5-fold increase compared to the same period of the previous year. The connection scale is projected to expand 3 to 5 times by 2030. Increased power demand due to the spread of data centers and AI is also boosting battery investment.
3 Features of the Wall-Mounted Solar Mount 'S-LINE'
◆ Utilizes Building Walls
Conventionally, solar power generation has generally been installed on rooftops. However, in actual practice, there have been many cases where companies 'cannot secure sufficient installation area on the roof', 'have no room to place new equipment on the premises', and furthermore 'are forced to abandon introduction due to roof load limits or structural constraints'.
Such...