American Honda Motor Co., Inc. today marked the opening of Honda Smart Home US, showcasing technologies that enable zero net energy living and transportation. The home, located on the West Village campus of the University of California, Davis, is capable of producing more energy on-site from renewable sources than it consumes annually, including enough energy to power a Honda Fit EV for daily commuting. A Honda-developed home energy management system and an energy efficient design will allow the home’s occupant to use less than half of the energy of a similarly sized new home in the Davis area for heating, cooling and lighting. The home is also three times more water-efficient than a typical U.S. home.
Honda Smart Home US, construction of which began in April 2013, will serve as a residence for a member of the UC Davis community, whose selection will soon be announced. The fully-furnished home comes equipped with a Honda Fit EV battery electric vehicle for the resident’s daily transportation. In addition to showcasing Honda’s vision for sustainable, zero-carbon living and personal mobility, the home will function as a living laboratory where the company, along with researchers from UC Davis and Pacific Gas and Electric (PG&E), will evaluate new technologies and business opportunities at the intersection of housing, transportation, energy and the environment.
Honda Smart Home US implements Honda’s home energy management system (HEMS), a proprietary hardware and software system that monitors, controls and optimizes electrical generation and consumption throughout the home’s microgrid. A 10kWh battery energy storage system in the garage, using the same lithium-ion cells that are used in the Honda Fit EV, allows stored solar energy to be used at night, when household demand typically peaks and electric vehicles are usually charged. Honda’s HEMS leverages the battery to balance, shift and buffer loads to minimize the home’s impact to the electric grid. The system will also enable Honda to evaluate the second life, or re-use, of EV batteries in grid applications, home-to-grid (H2G) connectivity and other concepts.
Honda’s HEMS is also capable of improving grid reliability by automatically responding to demand response signals and providing other grid services. If the electricity grid is overloaded, for example, Honda Smart Home is capable of shedding its load and even supplying power back to the grid. This type of smart grid connectivity will enable the mass deployment of electric vehicles and renewable energy without sacrificing grid reliability.
A 9.5kW solar photovoltaic (PV) system mounted on the roof will generate more energy than the home and Fit EV consume on an annual basis, due in large part to the efficient design of the home. All of the energy for space heating, space cooling, ventilation, lighting, hot water, appliances and consumer loads, in addition to the transportation energy for the Honda Fit EV, is supplied by the solar panels on the home.
The Honda Fit EV included with the home has been modified to accept DC power directly from the home’s solar panels or stationary battery, eliminating up to half of the energy that is typically lost to heat during DC-to-AC and AC-to-DC power conversion. When the solar panels are generating electricity at full capacity, the vehicle can fully recharge in approximately two hours directly from sunlight.
The Honda Smart Home US was designed to address specific challenges associated with the transportation and energy sectors in the United States. California’s Energy Efficiency Strategic Plan, for example, sets a goal for all new homes to be zero net energy beginning in 2020.iii Through a combination of advanced technology integration, energy efficiency measures and sustainable design techniques, Honda Smart Home surpasses that goal by producing enough energy to power the home and an electric vehicle on a daily basis.
“With the Honda Smart Home, we’ve developed technologies and design solutions to address two primary sources of greenhouse gas emissions homes and cars,” said Steve Center, vice president of the Environmental Business Development Office of American Honda Motor Co., Inc. “Ultimately, our goal is to contribute to the public dialogue about addressing CO2 emissions.”
“In West Village, UC Davis made a commitment to build zero net energy housing and gave our research center the goal of creating the first university hub to focus and energy and transportation research,” said Dan Sperling, Ph.D., director of the Institute of Transportation Studies at the University of California, Davis. “Honda Smart Home is a dynamic environment that will help the university meet its research objectives and is a perfect example of the industry partnerships we strive to build.”