Ishizaka Sangyo’s Energy Management ③ Introduction of Japan’s pioneering large-scale lead-acid battery equipment

Ishizaka Sangyo installed large lead-acid batteries as part of a joint project with a major domestic power company and a major battery manufacturer.
The batteries’ capacity is one of the largest in Japan for a private factory. By charging the batteries using electricity at night and using the battery’s power during the day, when consumption peaks, the company was able to significantly reduce its contracted electricity bill, achieving an annual savings of approximately 18 million yen.

Reduce electricity bills by 18 million yen per year

From the perspective of energy management, Ishizaka Sangyo introduced new “large-scale lead-acid batteries” in February 2018, with the aim of cutting peak electricity demand and taking measures for BCP.
The way these batteries work is that they charge the batteries with electricity at night and then use the charged electricity during peak daytime electricity usage.
Ishizaka Sangyo requires a lot of electricity to operate its recycling plant production line, but by introducing the batteries they were able to reduce their contracted electricity demand by 850kW. A reduction of 850kW equates to a reduction of approximately 18 million yen in annual electricity bills.

Role as a BCP measure (business continuity plan)

Since its introduction, usage of stored electricity has remained at a maximum of around 40% even during peak times. As there is ample storage capacity, the system also supplies electricity in response to requests from Tokyo Electric Power Company during peak hours. The
stored electricity can also be used in the event of a power outage or disaster, making it a useful system for BCP measures.

A pioneering joint project in Japan

The introduction of this storage battery was carried out as a joint project between a major domestic power company and a major storage battery manufacturer. The storage battery’s capacity of 1,100 kW is one of the largest in Japan for installation at a private factory.
In recent years, there has been growing interest in businesses that utilize energy resources such as storage batteries, and the company was the first in the general industrial sector to be selected for the “2017 Virtual Power Plant Construction Demonstration Project,” a subsidized project by the Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry, with approximately one-third of the installation costs covered by subsidies.
As interest in storage batteries as an independent power generation system grows, as a pioneer in their introduction, the company will continue to respond to inquiries regarding energy management, including storage batteries.

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