Mitsubishi Electric Corp will start to sell a PV inverter that is for electric vehicles and controls electricity of an EV and solar power generation system and commercial power on a trial basis for the first time in the world July 31, 2014.
The product, "Smart V2H," optimizes the charge/discharge of an EV battery, solar power generation and use of commercial power. In accordance with the usage of electricity, it switches among three operation modes: "Green Mode," "Economy Mode" and "Stand-alone Operation Mode."
In the Green Mode, the PV inverter maximize the use of solar electricity at home. It allows to charge an EV battery with surplus electricity generated with a solar power generation system during daylight hours and use it during nighttime hours or early in the morning. Whenever there is a shortage of electricity despite the electricity generated with a solar power generation system and stored in the EV battery, electricity will be purchased from a power company.
In the Economy Mode, all of the surplus electricity generated with a solar power generation system is sold to a power company. And an EV is charged with low-priced nighttime power.
In the Stand-alone Operation Mode, electricity stored in an EV is supplied to a house during a power failure. Existing systems that charge/discharge EVs can supply electricity from an EV to a house during a power failure but cannot charge an EV by using a solar power generation system at the same time.
Featuring the "technology to use a PV system at the time of stand-alone operation," the new product can deal with electricity from three power sources at the same time. Even when a power failure lasts for some time, it is possible to use solar electricity to supply power to a house and charge an EV as well as supply electricity stored in an EV to the house.
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