Combination of PV System, Reused Batteries to Be Tested at Seven-Eleven Stores

2019/04/23 17:09
Kenji Kaneko, Nikkei BP Intelligence Group, CleanTech Labo & Sousuke Kudou, technical writer
A test store for which a solar power generation system has already been introduced (Sagamihara Hashimotodai 1-Chome Store) (source: Seven-Eleven Japan)
The reused storage battery introduced by Japan Benex (source: Nikkei BP)

Kanagawa Prefecture and Seven & i Holdings Co Ltd concluded an "agreement on cooperation concerning the promotion of SDGs" to cooperate in the aim of achieving SDGs (sustainable development goals) April 17, 2019.

The prefecture and the company will conduct verification tests, etc for five items including local production/consumption of energy.

Based on the agreement, Seven-Eleven Japan Co Ltd will carry out a verification test of a storage battery system using used batteries of electric vehicles (EVs) in the summer of 2019. Solar panels and reused batteries of Nissan Motor Co Ltd's "Leaf" EV will be installed at about 10 stores in Kanagawa Prefecture.

By storing electricity generated during daylight hours and using it at night, Seven-Eleven Japan will reduce the power consumption of each store and strengthen its function as a local infrastructure at the time of disaster.

The kind of solar panels and the capacity of reused batteries to be installed at the stores have not been decided yet. But Kanagawa Prefecture and Seven & i Holdings aim to reduce the amount of CO2 emissions by 20%. Also, Leaf EVs will be used as commercial vehicles of management consultants, and a recycling model will be tested by using the rechargeable batteries of the EVs.

Moreover, the prefecture and the company will reduce plastic waste by integrating and reducing plastic bags, prevent diseases by using the "beauty24" application distributed by Seibu Holdings Inc and promote "diversity" and "inclusion" aimed at inclusive society through performances for the understanding of internship, employment and workplace.

Kanagawa Prefecture is the only prefecture that was selected for both "SDGs Future City" and "Local Government SDGs Model Project," and it set "Kanagawa SDGs Policy Initiatives," actively promoting SDGs. Also, Seven & i Holdings set "Five Important Issues" for SDGs. In Kanagawa Prefecture, the company has 1,444 stores of Seven-Eleven, 31 stores of Ito-Yokado, two stores of Sogo/Seibu and 83 stores of Seven & i Food Systems. And the Seven & i Holdings group runs 1,631 stores in total in the prefecture.

In May 2019, Seven-Eleven Japan opened "Seven-Eleven Sagamihara Hashimotodai 1-Chome Store" (Sagamihara City, Kanagawa Prefecture) for a verification test of meeting half of the power demand of the store with renewable energy. With solar panels set up on the road, roof and carport, half of the electricity consumed by the store can be generated (Seven-Eleven Store Meets Half of Its Power Demand With Renewable Energy).

The reused batteries of the Leaf were also used for stationary battery systems at an office of Japan Benex Corp (Isahaya City, Nagasaki Prefecture). The company installed 400kWh of reused rechargeable batteries (total output: 400kW) at its main factory in April 2018 and started to use them in conjunction with rooftop solar power plants, etc.