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DoCoMo to deploy 10 solar powered green base stations in the Kanto-Koshinetsu region of Japan


NTT DoCoMo announced today that from April, it will begin field testing three conventional mobile-network base stations in Japan that have been installed with solar panels, high-capacity rechargeable batteries and green power controllers. DoCoMo which is developing disaster-proof, environmentally friendly base stations following the Great East Japan Earthquake tested the equipment at its R&D Center from March 2012 to February 2013. The equipment will now be used to establish 10 green base stations in the Kanto-Koshinetsu region of Japan by late summer, including the first three in Tokyo, Kanagawa and Yamanashi prefectures.

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DOCOMO’s green base stations use solar panels to generate and store solar power during the daytime. If commercial power supply is cut off during a disaster, the station can rely solely on this power to run communication equipment during the day and use high-capacity, rechargeable batteries to store 14-16 hours’ worth of power when solar power is not available. The solar panels to be used in the field test generate up to 4.19 kW, whereas the maximum power consumption of a base station is 2.0 kW. To cut down on electricity costs, the batteries can be charged with electricity purchased at nighttime, when costs are relatively low.

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