Toyota announced that they has developed a
Vehicle-To-Home (V2H) system, which allows power to be shared between a
plug-in vehicle(PHEV) and a home. The company will begin testing the new
system at the end of 2012, using Prius plug-in hybrids at ten households that are part of the Toyota City Project.
A V2H system lets homeowners store electricity in an EV battery during
cheaper off-peak times, and use it to power the household during peak
times. It can also function as an emergency power source in case of an
outage. There’s a lot of interest in V2H and other “smart” energy
applications in Japan these days, as the country begins to phase out its
nuclear power plants.
Toyota’s V2H system uses an AC100 V
inverter onboard the Prius PHEV to convert stored power into AC suitable
for home use, while a Home Energy Management System (HEMS)
automatically controls the energy flow. With a fully charged battery and
full tank of gasoline, a Prius can supply enough power for an average
Japanese household (about 10 kWh) for four days.
Source:http://youtu.be/fmaDH2_rNOY