Yokohama, Japan – Nissan and 4R Energy Corporation have developed a charging system for electric vehicles that combines a solar-power generation system with high-capacity lithium-ion batteries.

The system is being tested at Nissan’s global headquarters in Yokohama.

Electricity is generated through solar cells and is stored in lithium-ion batteries equivalent to four units of Nissan Leaf electric vehicles. The facility has three quick-charge and four normal-charge stations, and the company said that the total electricity that can be generated and stored is equivalent to fully charging approximately 1,800 Leaf vehicles annually. By storing the electricity in batteries, power can be supplied to vehicles regardless of the time of day or weather.

4R Energy Corporation is a joint venture of Nissan and Sumitomo Corporation, formed in September 2010. It has already started tests on a compact electricity storage system installed with second-life lithium-ion batteries previously used in Nissan Leafs. Based on the outcome of this larger system, 4R Energy plans to enter the market for midsized electricity storage systems for commercial and public facilities.

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