Electric Vehicles (EV) are the most fuel efficient green vehicles. Electric Cars are already being used as family car by individuals in most of the countries. Electric vehicle batteries are heavier to support high-speed long-range commuting, HVAC, vehicle safety electronics, infotainment appliances, and portal gadgets such as mobile phones, laptops, audio/video players etc. Some of new electric vehicle battery charging systems allow EV battery to serve as backup battery for your house in case of power cut.

Electric Vehicle to Home Backup BatteryJust last month, Nissan was looking for ways to utilize the battery packs inside of its Leaf EV once the vehicle has reached the end of its lifespan. The automaker found that these batteries will still have 80 percent of their original charge capacity once the Leaf is ready to be laid to rest, and with its plans to release seven EV models (in addition to the Leaf) by 2016, that will be a lot of leftover batteries.

Nissan found that using these batteries as energy storage devices made the most sense. In fact, the company kept four old Leaf batteries in a cellar in a Nissan building, and the batteries were hooked up to 488 solar panels on the roof. This allows the batteries to store the energy that these solar panels create, and the power produced is enough to charge 1,800 Leaf vehicles annually.

Now, Nissan is introducing another similar initiative called “Leaf-to-Home,” (V2H) concept which will use electricity stored in Leaf batteries to be distributed to residential homes and appliances. The new plan serves as a two-way charging system, meaning that the Leaf can be charged as usual, but the Leaf can eventually return the favor by supplying electricity from its battery when there’s a local power outage. “V2H” stands for the “Vehicle to Home” system, which enables energy that is stored in an electric vehicle’s batteries to be used in residential homes. With housing that connects with the LEAF to Home system, which enables LEAF owners the option of powering their homes with their cars’ batteries.

With the Vehicle to Home system, the home can maintain stable in-house power supply that is not affected by weather, and can rely on power stored in an EV’s batteries if power is cut off during a disaster. The system is currently being tested in Japan. The Nissan Leaf’s 24 kilowatt hour (kWh) battery is capable of powering a Japanese home for two days.