Daiwa House Industry Co Ltd announced June 9, 2010, that it has constructed a convenience store equipped with a lithium-ion (Li-ion) rechargeable battery system in Ehime Prefecture, Japan.
The company installed photovoltaic (PV) batteries, Li-ion rechargeable batteries, LED lighting equipment and an energy management system to use solar energy for the lighting equipment and refrigerators in the store. Also, the rechargeable batteries store surplus electricity to equalize the power load.
Furthermore, the store can be used as an evacuation center in case of an emergency such as an earthquake. In such a case, the electricity stored in the rechargeable batteries can be used for one day.
The output of the PV battery is 10.08kW. Daiwa House Industry installed 56 modules manufactured by Sharp Corp. The energy management system is manufactured by Nihon Techno Co Ltd.
The Li-ion rechargeable batteries are supplied by Eliiy Power Co Ltd, in which Daiwa House Industry has a stake. The capacity and output of the rechargeable battery are 10kWh and 6kW, respectively. A total of 20 modules are used (each module consists of four cells).
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