GE: Smart grid yields net-zero energy home

At its research labs, GE says it has the smart-grid technology, including solar panels and efficient appliances, to build a home that has a net-zero energy consumption.

Martin LaMonica Former Staff writer, CNET News
Martin LaMonica is a senior writer covering green tech and cutting-edge technologies. He joined CNET in 2002 to cover enterprise IT and Web development and was previously executive editor of IT publication InfoWorld.
Martin LaMonica
4 min read

NISKAYUNA, N.Y.--General Electric unveiled a project at its research labs that will let homeowners cut annual energy consumption to zero by 2015.

These "net-zero energy homes" will combine on-site power generation through solar panels or wind turbines with energy-efficient appliances and on-site storage. Consumers will get detailed energy data and potentially control appliances with Home Energy Manager, a device that is expected to cost between $200 and $250, according to GE executives at a smart grid media day.

GE is piloting the in-home products this year and expects to have the appliances and energy display available next year. The premium for the more efficient, networked appliances will be about $10 more, GE executives said. A net-zero energy home would cost about 10 percent more by 2015, executives said.

Kevin Nolan, vice president of technology at GE's Consumer & Industrial unit, shows off GE's demand response appliances and Home Energy Manager at GE's smart grid symposium at its Global Research Center in upstate New York. General Electric

Studies show that when consumers have more detailed information on their energy use, they can find ways to reduce consumption by 5 to 10 percent. When utilities have variable, or time-of-use, pricing, consumers could cut electricity use by 15 percent at on-peak times, typically in the morning and early evening.

GE appliances have been converted to have electronic controls and will have a small module in the back that will allow it to communicate with a home's smart meter. With that communication link in place, consumers can find out how much electricity individual appliances use and program them to take advantage of off-peak rates.

"I don't think any of us look forward to the day when we are monitoring hour to hour the cost of electricity. But I think all of us look forward to the day when we can set it and forget it," said Bob Gilligan, GE's vice president of transmission and distribution. "That's the future we look forward to."

For example, a consumer can set up the system so that the temperature in a water heater or thermostat can drop down to a certain level when nobody is at home.

Consumers can turn off features that will enable appliances to communicate with utilities to participate in utility-run demand-response programs, where a utility can adjust thermostats or appliances to shave peak-time consumption, according to Michael Beyerle, a marketing manager at GE's Consumer & Industrial appliance division.

Consumer incentive strong?
The idea behind the smart grid, which encompasses a range of technologies, is to make the electricity grid more efficient and reliable by applying information technologies and controls to the existing grid.

In addition to networked appliances, GE's Net Zero Home Project calls for on-site power generation through solar panels or wind turbines. GE produces solar panels and has invested in residential wind turbine maker Southwest Windpower. A 3,000-watt solar panel array, which costs roughly $30,000 to install, would be enough to supply all of a home's consumption, according to GE executives.

The major components of a net-zero energy home as part of its Net Zero Energy Home project. General Electric

Plug-in electric vehicles and home batteries could be used to store electricity for peak-time power or back-up. Plug-in vehicles could also be charged during the middle of the night to take advantage of off-peak rates.

GE's Home Energy Manager control unit, which consumers access through a dedicated display, provides information to consumers but also is designed to optimize one-site energy generation and consumption.

For example, the control unit could evaluate electricity rates and see that running a dishwasher when the solar panels are producing is cheaper than running the load at off-peak times, explained Beyerle. Or a clothes drier can go into "conservation" mode during peak times where it will operate at a lower temperature and take longer to run.

During the media day, GE hosted a panel on challenges to the smart grid with Mark Brian, a consumer (and GE employee) using a suite of GE appliances at his home in Louisville, Ky.

He found that his monthly electricity consumption and his energy bills have gone down by 20 percent compared to last year. Because his home now has time-of-use pricing, his bills would have gone up if he hadn't been using the networked appliances. He added the system has given him ideas on how to take advantage of cheaper rates. "We still do the same stuff. We just do it at different times," Brian said.

GE executives said that the information-management tools need to be very easy to use. Also, policies need to be in place to address data privacy and to create financial incentives, namely variable pricing.

"There's a lot consumers are willing to do if they are properly informed and properly incented," said Gilligan.

Updated at 12:55 p.m. PT to clarify the changes in Mark Brian's utility bills.

Photos: GE's smart-grid kitchen of the future (photos)

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