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Green A/V Limits Phantom Power Load
This California home is shedding energy by automatically cutting power to its array of high-end electronics.
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GOLD WINNER: Best Green Home
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June 19, 2009
by Steven Castle

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A Lutron HomeWorks lighting control system also helps the Levinsons save energy by dimming lights and programming preset scenes so that only the lights needed for particular tasks come on. But Frank is going beyond that, replacing many of the traditional incandescent bulbs with dimmable compact fluorescent lamps (CFLs) and even higher-efficiency LEDs (light-emitting diodes). He says a lot of the home’s 50-watt halogen lights are being replaced by 5-watt LEDs. These LEDs can’t dim all the way down to 1 percent, but that’s a compromise the Levinsons will gladly live with, as they’re saving a lot of energy.

The Levinsons can see much of what they are using in electricity via the Agilewaves energy-monitoring system. It’s connected through an Ethernet network and viewed through a web interface by Frank. SoundVision is planning to display data on the Crestron touchpanels, though for now Quisisem says the web interface is more robust.

Sensors monitor the electrical, solar, solar thermal, and water systems and send that information to a data acquisition box, and a PC server maintains the database.

Frank can see when his nephews are in the downstairs apartment playing on the computer all night. And the monitoring capability has enabled him to identify problems with the system. For example, after the photovoltaic solar system was installed, he noticed irregularities with the data associated with it and realized that one of the inverters used to convert the DC power from the solar system to AC for the home’s electrical use wasn’t working properly. There would be no way to know that from simply reading a monthly utility bill.

For now, Frank can see that he’s producing more energy from the solar system than he is using, though he plans to add a hot tub and a lap pool. That will use up more juice—and he’s sure to know exactly how much.



Steven Castle - Contributing Writer
Steven Castle is Electronic House's managing editor. he has been writing about consumer electronics, homes and energy efficiency topics for two decades. He is also the co-founder of GreenTech Advocates.


Equipment List

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Systems Design and Installation
SoundVision, Novato, CA
www.svsf.com

Builder
Don Larwood, Berkeley, CA

Architect
Mahoney Architects
www.mahoney-architects.com

Solar Systems Installation
Sun First!
www.sunfirstsolar.com

ENERGY MONITORING
Agilewaves hardware

SOLAR SYSTEMS
SunPower 12-kW photovoltaic system with dual inverters
Heliodyne solar thermal system and Takagi tankless water heater

AUDIO/VIDEO SYSTEMS
Pioneer Elite KURO PRO-150FD 60-inch plasma
Mitsubishi PD-5065 50-inch plasma
Chief PDR-2042B articulating wall mount
Chief PDR-UB universal articulating wall mount
Sanus extension mount SA-VMB1B
Sanus low-profile plasma mount SA-VMPL2B
Audio Control Model 860 12-channel 60-watt amplifier/equalizer
Audio Control Model 1160 16-channel amplifier/equalizer
Axis 243SA video server
Denon AVR 3808 receiver
Denon AVR 4308ci receiver
Panasonic, Blu-ray DVD player with SD card slot
Panasonic Blu-ray player set up for multiregion DVDs (2)
ReQuest F2.400 250-GB music server
Velodyne 3000-Watt Dynamic sub amp (2)
Leon Speakers Hz616 center-channel speaker,
Leon Speakers PR606-60 Profile series on-wall speakers (2)
Leon Speakers HZ414-LCR left, right, center speaker for 50-inch plasma
SpeakerCraft Aim Wide 5 in-ceiling speakers (24)
Velodyne in-wall subs (2)
Active Thermal Management cooling system
Extron video switchers
Panamax MAX 7500-PRO power conditioner & voltage regulator
Panamax power conditioner with 20-amp circuit
Panamax Powermax 8 Series surge protector

CONTROL, NETWORKING & LIGHTING SYSTEMS
Crestron home control system
Lutron HomeWorks system
Netgear Ethernet switches

OTHER SYSTEMS
Channel Vision P-0921 2-door telephone entry system
Holovision intercom entry system

ACCESSORIES
Middle Atlantic racks
Pro-Series HDMI cable
Terk XM antenna
Tributaries Series 5 audio cables



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Comments (6) Most recent displayed first.
Posted by Solar lights  on  04/22/10  at  01:13 PM

Greetings!

When the solar panel is facing the sun at noon it will produce the most power it can be it summer or winter. But there is a however involved here. In the summer the sun comes up in the north east and sets in the north west which would be behind the solar panel in the morning and late after noon.Solar lights

Posted by Gene Quisisem  on  06/23/09  at  04:01 PM

Douglas, JB, and Keith - This home is a zero-energy home.  What that means is that it produces more energy from renewable sources than it consumes.  What little natural gas is consumed is offset by excess electrical power production that is fed back into the grid.  Said in another way, the home’s energy bill is nearly $0, despite having all the comforts, convieniences and luxuries of having a showcase Electronic House.  So how much energy is this home saving?  All of it.  What if every home was a zero energy home?  We would have found energy independence as a nation.

It’s not fair to compare this project to a hybrid Cadillac Escalade, as that vehicle’s energy uses primarily fossil fuel.  It’s more appropriate to use that analogy with a “green home” that is massive in size and is loaded in features, but only offsets part of its energy use from renewable sources.  A project of that nature actually would likely have a carbon footprint that is 10x or more than that of a typical home.

Douglas, to your question, ” ... what effect do they have on the environment during manufacturing and shipping?”  When this home manufactures its own electrical power, it saves the 30% transmission loss that occurs through our nation’s grid system. 

I think that as the cost of renewable energy declines, we will discover that owning power sure beats renting it.

Posted by Steven Castle  on  06/23/09  at  03:05 PM

Douglas,
We didn’t do a good enough job explaining it in this article, but this is, as I understand, a Net-Zero home, which produces more energy than it uses. And the automation system helps with that, by automatically cutting power to heavy loads. It’s something I think we’ll see more of, especially in large homes with lots of electronics. Sure, a switch may be simpler, but those can also be left on. My bet is that we’ll see a lot more energy monitoring systems in the next few years, in big and small homes, and lower-cost control systems to help all of control those energy loads, even when we’re not there. Homes like these are just the start,

Posted by Douglas  on  06/23/09  at  01:17 AM

Just reagarding the “phantom” stuff in this article (I couldn’t read any more) - Wouldn’t it be easier to just manually turn off power outlets connected to a light switch?  What is this guy really saving?  How much do the controls cost and what effect do they have on the environment during manufacturing and shipping?  What happens when he’s finished using it?  How much energy gets used up trashing the controls?  I walk over to my entertainment system, all plugged into a single circuit that gets cut off with a light switch.  Wow.  High-tech automation.  Big deal.  “My finger sucks.  I hate using it.  Let’s buy thousands of dollars worth of automation equipment to replace my finger.”  When I leave home I flip a switch that turns off a relay that cuts power to everything.  Relay cost me nothing…trashed from a demo at mfg plant where I work.  This promotion of wasteful technology when we have the greatest automated computer built into our head just puts us deeper into debt - intelligence debt.

Posted by JB  on  06/22/09  at  01:38 PM

Agree with Keith.  Hypocritical indeed.  The green movement is designed to make people with money (like the owner of this house) “feel better” about being proactive on the environment.  He probably drives one of those Escalade hybrids as well.

http://green-agenda.com


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