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Toyota vehicle-to-home technology turns Prius Plug-in into an emergency generator

Electric vehicle charging has been a hot topic for years, but it’s mostly been a one-way discussion: how the EV charges from a given home charging system. Toyota turns the conversation around, experimenting with how the home can draw power from the EV. Toyota’s vehicle-to-home (V2H) charging system offers two-way charging between the Prius Plug-in and a home power supply.

Obviously, the Prius Plug-in’s small lithium-ion battery isn’t enough to pull a home off the greater electric grid, but Toyota envisions the two-way system working as an emergency generator during blackouts. It also envisions the Prius Plug-in drawing power during off-peak hours and then feeding that stored power back to the home during peak times, helping to lower energy costs. Toyota says that the Prius Plug-in can power an average Japanese home for up to four days.

The V2H system equips the Prius Plug-in with an AC100 V inverter that converts the car battery’s direct current into the alternating current used in homes. Communication between the car, the charger and the Home Energy Management System (HEMS) facilitates power flow between the car battery and home.


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