10 Power Monitoring Devices to put Your House on a Diet and Save Power
January 25, 2008
With New Years day already fading into the distance, many of you may have hammered out some resolutions. Maybe you are with the millions each year who decide to go on a diet, join gyms, and try and live a healthier lifestyle. Maybe you are cutting expenses as the economy looks a bit un-sturdy. Possibly your goals are a bit greener; to reduce your carbon footprint, help clear the air, or maybe to reduce your dependence on the grid. Whatever your goals, the odds are against you if you don’t have meaningful feedback on your progress.
I’m not trying to sound dismal, but if you were to graph out gym memberships for a given year, you would see a strong spike in January and February and a steady decline for the remainder of the year. People just quit going. Some might say they are lazy or suffer injury and need to stop, but I would propose that most stop going to the gym due to a lack of accurate and meaningful feedback and possibly an unrealistic goal to begin with. When measurable results don’t come on their time table, their resolve is weakened, day after day, until they no longer strive for that goal. Sure they still want to achieve it, but they begin to think that the goal is out of reach.
Putting your lifestyle on a diet also can be met with meager results if you don’t have goals, a good plan, and the tools to monitor progress. To that end, Watthackers has compiled the following list of devices that covers the gamut of energy monitoring in home applications. Most of the devices reviewed are designed to be added an existing electrical circuit to monitor the consumption an individual device or the whole house. No matter the device, each one succeeds in raising the awareness to power consumption in the home.
Each of the following products are reviewed and displayed in no particular order. Moreover, none of the devices reviewed are sponsors of this site. This review is purely my unbiased opinion based on information available about the devices which I reviewed in pursuit of the ideal device(s) for our home. My hope is that this summary will prove to be a useful collection of information for those of you on a similar quest to control personal energy use.
1. TED (The Energy Detective)
Starting at $140 | Whole House Monitor | Website
The Energy Detective, or TED for short is a simple and effective device for monitoring home power use. Inductive pickups are easily installed in the electrical panel without the need to disconnect power and hire an electrician. Simply locate the two service lines coming into your 100/200 amp breakers, and clamp the two inductive pickups around each of these wires. The wireless transmitter will then start broadcasting your energy usage to a remote digital display.
You can also use this device to monitor individual circuits and loads. I have requested specifications on how small a load can be measured accurately with this device. At the time of publishing, I have not heard back for the manufacturer, but will update the article in the event that I do.
Another nice thing about TED is that it accommodates almost all billing structures, including any combination of Time-of-Use (off-peak, mid-peak, peak, critical-peak), up to 5 tiers, Summer/Winter, fixed charge, energy surcharges, and taxes. This allows you to closely replicate your electricity bill from month to month
TED has built-in alarms to alert you to high energy use or to keep energy costs below a monthly budget. But maybe more interesting is the ability to plug the device into a computer via usb and download all your usage data to their data logging software called Footprints ($45). This is a nice feature if you like to see a lot of detail about your usage.
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2. The Meter Reader
Starting at $215 | Whole House Monitor | Website
The Meter Reader is a lot like TED. It’s primarily designed to be a whole house monitor, but can be used to monitor individual circuits. It can measure both 120/240 circuits as well. Installation is performed by installing two magnetic pickup clips over the main service wires. These clips are then wired directly to the display, which limits where you can monitor usage.
It does have a neat feature in that it will attempt to predict your next power bill based on average use. However, for the money I would suggest looking at some of the other devices in this list before purchasing.
3. Smart WORKS
Components Range from $160 (Smart-Watt) to $599 (Smart-PDU Backplane) | Individual Circuit/Load meter. | Website
Brace yourself, this one is going to get a little technical. The Smart Works line of power monitors is a bit unconventional in this line-up in that they are aimed more towards the data center community than the home market. The Smart-Watt is an in-line watt meter that connects to a network via an Ethernet cable. Live monitoring is done via Plug and Play Host software which can automatically discover and configure newly connected Smart-Watts making installation effortless. Multiple Smart watt devices can be daisy-chained together to create a network of monitors.
If you are in the process of building a house, developing rentals where you need to monitor multiple fuse boxes, or possibly want to remotely monitor the output of a solar panel installation on your cabin, you may want to take a look at the Smart-PDU. Smart-PDU accurately meters power and energy usage on individual branch circuits of your Power Distribution Unit (PDU) or fuse box. The Smart-PDU is designed to be scalable with modular BladeMeters that measure load for a pair of circuits. This voltage input along with current information provided by split-core current transformers installed on each circuit is continuously monitored by the BladeMeter to accurately determine the cumulative energy usage and power load for each circuit. The Smart-PDU cabinet supports up to 21 BladeMeters so you can configure Smart-PDU to meter between 2 and 42 branch circuits in two circuit increments. For large installations, multiple Smart-PDU cabinets can be daisy-chained together to form a larger monitor network. Probably more that any home user may need, but it’s nice to know the option is there.
Finally, the Smart-Net device is designed to pull it all together and form a network accessible collection of your Smart-Watt and Smart-PDU devices. Each Smart-Watt is equipped with a unique device ID that identifies it on the Smart-Net network. As you add Smart-Watts to your network the host software can automatically discover each device and read its Unique Device ID, User ID, Model Number, Rated Amperage, Rated Voltage, Watt-Hour Reading, Power-Cycle Reading and other device specific data. Smart-Nets’ daisy-chain architecture supports connecting to multiple Smart-Watts from a single Serial Port, USB Port or IP Address. This greatly simplifies setup. A Smart-Net Gateway is a network appliance that provides a bridge between a Smart-Net (group of daisy-chained Smart-Watts) and your TCP/IP network. By connecting a Smart-Net Gateway to a single static IP address you can connect across your TCP/IP network to a group of Smart-Watts and manage them with the services it provides.
4. Kill a Watt
$35-40 | Plug Meter – 120v only | Website
The folks over at P3 International make the device that may do more good for the environment than all the others combined. Not because it’s better than the rest, but because it’s so affordable that just about everyone should get one. Average retail is around forty bucks, but regularly you can find them in online sales for half that much. At those prices, it will pay for itself many times over.
The Kill a Watt is designed to plug directly into an outlet, then the device you want to monitor (toaster, tv, microwave, etc.) plugs into the Kill a Watt. Forget about it for a day or two and then come back to see your treasure of data.
The Large LCD display shows consumption by the Kilowatt-hour, same as your local utility. You can calculate your electrical expenses by the day, week, month, even an entire year. Also check the quality of your power by monitoring Voltage, Line Frequency, and Power Factor. Now you´ll know when it’s time to replace that old air conditioner.
The down side to the Kill a Watt is that you will need to do some basic math to arrive at cost of energy consumed. Moreover you will need to do those calculations while the device is still plugged in since the Kill a Watt lacks an internal battery. If you are a data geek and want lots of feedback on how you are doing with your power project, you should be looking at a data logging capable device like TED or Watts Up PRO, but pick one of these up when they go on sale. You will find a use for it, I promise.
5. Watts up PRO
$130 | Plug Meter – 120/240v (240v with optional cords) | Website
One of the more feature rich “Plug Load” meters, the Watts Up Pro is hailed as their best selling model according to manufacturer Electronic Educational Devices who is based in Denver Colorado. These units have been in the marketplace since 1992 and have undergone many improvements over the years. What makes the Watts Up? PRO so unique is the data logging feature that can be downloaded to a computer via the usb or serial cable and their custom software. How deep you dig into the data is up to you, but it’s nice to have the level of detail and the ability to save the results over the long term. It records all the data as fast as once per second so you can see the load profile as it changes over the course of a day, week , or any time frame desired. The software automatically graphs all the data and includes an integrated analysis tool, called the Payback Calculator, which automatically calculates the time required for a new energy efficient appliance to pay for itself. Monthly savings are calculated, and they are compared to the purchase price of the new appliance.
The Watts Up? PRO model retails for $130 – 145 depending on your source and comes with needed software and a USB cable (same type as for digital cameras) to download the data directly to a PC. They also sell a basic model without the PC connectivity, but with a retail of $95.95, I don’t think the savings is enough not to step up to the Pro. If you like the Cadillac version, there is one that also connects to the Internet to allow for remote monitoring and power switching. At $235.95, it’s not for everyone, but could be a great addition to a second home.
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Power Cost Monitor
$146 | Whole House Meter | Website
About the size of a small electric clock, the PowerCost Monitor (PCM) is a real-time direct feedback display device for domestic energy consumers. It tells them at a glance, in real-time, how much electricity their home is using in dollars and cents and in kW.
The PowerCost Monitor consists of two components:
- A detection unit, known as the sensor unit, is affixed to an existing household utility meter with a simple ring clamp. The detection unit optically monitors the rotation of the meter’s dial and transmits the information to the Display Unit. This is the only component of the PowerCost Monitor that will be in direct physical contact with the utility’s meter and the clamp mechanism allows it to be attached to the outside of the meter glass. It can also be quickly attached and detached without making any changes to the existing meter.
- The display unit, located inside the home, receives the wireless signal from the transmitter and displays the consumption information in real time and in dollars and cents. Other information is also displayed such as time and outside temperature.
There have been some reports that weather, dust, or other debris can affect the accuracy of the sensor, so the cost of having a whole house meter that is so easy to install is that you may need to clean it from time to time and install batteries. Personally I think the display of the PCM is one of the nicest.
Cent a Meter
$180 | Whole House Monitor | Website
The Centameter is a wireless real-time electricity monitor for the home that displays real-time electricity usage in cents/hour and kW. What’s unique about this power meter is that it also displays greenhouse gas emissions in kg/hour. It displays the cost of electricity being used on a wireless, easy to read LCD monitor inside your home. here’s a rundown of the specs:
Features, Specifications & Certification
- Displays cents/hour of electricity cost,
kW of electricity demand, kg/hour of greenhouse gas emissions - Large digital display and LCD screen for easy viewing
- Adjustable electricity rate
- 2 clip-on sensors for attachment at electrical panel
- Wireless display receiver unit that can be taken from room to room or mounted in a central location
- Temperature and humidity display
- Peak load alarm
- 12 month warranty (excludes batteries
Wattson
$300 | Whole House | Website
If you are less geek and more chic, the wattson should get your attention. With both numbers and soft glowing colors, wattson shows you how much electricity your home is using at any given moment. Colored mood light, which breathes and pulses, changing color when you alter how much electricity you use; Cool blue for small amounts of electricity being used; warning red for high energy consumption.
Information from a transmitter attached to your electricity meter or fuse box is beamed directly to your wattson which instantly displays your current usage. Wattson can also store up to 4 weeks of energy-use history which can be downloaded to your computer and viewed using software available from their website.
If we lost you with the Smart Works products, you will love wattson which is really easy to install and even easier to use (the instructions are completely free of techno-babble.) Wattson can now show energy use in Euros, Dollars, Stirling and Yen as well as Pounds, making it a truly international product. It can also measure single and 3 phase systems, making it suitable for large houses and even small businesses.
Home Joule
Price Unknown | Whole home/Community Power Monitor | Website
If you live in New York City, the Home Joule is for you! Consumer Powerline currently offers both Demand Response Event Notification and Peak Load Advisory Notification to all current New York City residents and businesses. They help ensure reliable supplies of power from the grid to consumers by broadcasting ways they can reduce kW usage at particularly critical times-when demand is unusually high and supply dangerously short.
Customers who commit to reduce demand when the electric grid is under stress receive cash payments for this commitment. Energy prices change hour by hour. Depending on the billing plan you are on, you may be paying drastically different rates at different times of the day, during different seasons. When is the grid under stress? When are your rates highest? When are they lowest? And when will you best contribute to the reliability of the grid and improving the environment?
Home Joule is a state-of-the-art energy data display device that tells you how the price of electricity is changing, hour by hour. Welcome to a community making informed decisions about energy use. These decisions are cost-effective, environmentally sound, and helpful to maintaining a reliable supply of clean electricity to you and your neighbors.
Green Switch
$1125 – Starter Kit | Whole/Partial House Load Control | Website
Green Switch is a line of replacement home electrical devices that are aimed at cutting phantom loads. When installed, the Green Switch devices form a wireless network that respond to a Master “green” switch. When exiting the home, the last one out simply switches the GreenSwitch to the off position. A wireless signal is sent to all of the GreenSwitch slave components such as wall plugs, light switches, and thermostat. Designated light switches and wall plugs will automatically turn off. The home’s Air Conditioning/Heating System is automatically set to the unoccupied mode allowing for more energy efficient operating temperature range (set points). Upon returning to the home, simply flip the GreenSwitch to the on position and the wall plugs and air conditioning/heating systems will return to normal modes. Light switches may be operated manually as needed for continued savings.
The system is completely wireless and may be retrofitted in an existing home or added during new construction. GreenSwitchTMcan even control out buildings and barns over 100 yards away. A perfect solution for those detached garages or shops. the starter kit is a bit pricey, but the convenience of being able to shut off all your loads at once is certainly worth something. Check out their website and take a look at their online video which explains the process.
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Tags: electrical circuit, energy monitoring, Green switch, Home joule, how do I reduce my power bill, power consumption, Reduce Power Bill, save energy, TED, The Energy Detective, Watt Meter, Watt Tester, Wattson, whole home energy, whole home power, whole house energy, whole house power
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I think I need that TED or The Energy Detective at home in case I need to fix something and my electricians in Perth can't come. This would certainly help me become more aware too on our electrical devices and would equip me to be prepared to fix it when it needs to.
I like your ideas regarding these devices specially in terms of monitoring electrical usage and saving expenses from it. Actually, our electrician in Garden City already endorsed these gadgets to us.
Is there any device that can control the useage of a house?
Sharif – Check out GreenSwitch.
Thanks for the information, sblackb.
Some fantastic ideas here, I especially like the Home Joule.
great post! I surely have learned a lot from reading this.
Anyway, by personal account, I really like the TED. It's simple to use and brings great results. However, when I read about the KILL – A – WATT, I changed my mind. It's definitely cheaper. However, I still need to look behind that low price, almost always there is a reason for the cheapness. But that doesnt necessarily apply to all items.
But if you really want to save on power, try cutting up your monthly bill by using solar power or something. Or maybe instead of watching TV or playing PC GAMES, you could head out the park and play basketball or do something else instead.
Thank you for this post! Cheers!
The software is not that great, and you need the computer to be ON all the time to be able to re record the data.
So be aware of these issues. In my opinion TED needs more works!
Per your recommendation, I tried Kill A Watt and it definitely is a handy tool to have ready access to.
Yes, there is some math involved, but that's not a big deal.
You can easily save the cost of these items if you're serious about the process. It can even push you over the edge and make some appliance investments you've been putting off.
@forwardenergy, that's true. It takes a real fire from within for both – consistent energy saving habits and going to the gym regularly. Heck, its so tough to exercise daily at home too!
In response to forwardenergy’s comment above –
“I like your comparison to Gym memberships in the Jan. and Feb” –
funny enough, spaeaking of gyms and power, I read the other day that they are trying to work out a method to harness power that is generated by people using the gym. If you think about every running, rowing, cycling etc, they must be exerting a lot of power(watts). Surely it won’t be long until they work out a way to capture this and store it. They can then even introduce incentives to exercise because you are creating power for yourself and others to use.
Very interesting post. Thanks
All the best
Bill Jenkins
Webmaster, BestLawnMowerReviews.net
I would like some ideas on some devices that could be used in the class room for elementary school children. I had found a piggy bank that a person would put money in the piggy bank and it alowed to use your game system for as long as your money would let you. But of course I did not write the web site down. I thought I saved it on my favorites can't find it. I'v been looking for it for some time. I thought maybe you can help me find something like this to us in the classroom. I do have the kill-a-watt machine and it did not come with instructions. Its hard to read. I don't know how many watts are being used over time. It does tell me the watts.
Another device that isn't listed is the Envi, I like your comparison to Gym memberships in the Jan. and Feb. months. I think it hits the nail on the head. A recent study showed that after a certain amount of months of energy monitoring people tend to go back to their old habits. I think if you truly need to save money to make ends meet you will keep things up, with this economy that is becoming unfortunately more and more the case
The PowerCost Monitor website link is broken…You can find our home page at http://www.bluelineinnovations.com
If you have any questions feel free to ask!
@powercost
We are building a complete list of home energy monitoring devices and asking users to share their experience with our readers. If you have used any energy measuring device in your home please share your experience with us.
List of Home Energy Saving Devices
http://www.open4energy.com/technology/home_energy…
Shane, Smart Works devices comply with UL 61010, just like most handheld Fluke meters. Devices with inductive sensing do require agency approval.
What type of certification (UL, CE, CSA?) do these devices require? Would all the devices need this or only the devices that interface to the voltage directly? Would the devices that use a non-electrical method of measurement, such as a induction clamp or a visual pickup, need any certification? I have some concerns about the safety of some of these devices.
To the authors, Keep up the great work compiling this information for consumers!
[...] Apr 3rd, 2009 • Category: Energy Savings, Lead Story Last year I put together a list of 10 Power Monitoring Devices to put Your House on a Diet and Save Power to share with everyone the great options that were available for monitoring and reducing home (or [...]
Great quality stuff.
Hey,
What about Powometer and MyEnergyUsage? They connect to Wattson and allow you to monitor, log and compare your usage to your friend’s usage.
http://www.myenergyusage.org
Later,
Fred
[...] We will bring you an update after the conference. Until then, you may want to check out these 10 Power/plug meters that are already on the [...]
I purchased a Wattson from the UK last summer. I live in the Bahamas (we use North American power standards) and it will not work. I’m not an electritian and don’t know the specs. The clamp is for a wire the diameter of your pinkie, I have a home with 3 phase supply more at the diameter of a half dollar piece. The diykyoto web site for Wattson, still does not clearly state the companies time table to make a North American variant. Your inclusion in your roundup has me hoping you know something I don’t, has Wattson been UL listed etc?
Oter than the issue with Wattson, what other live data logger can you suggest for me?
I realy need more info on the Watt’s up Pro and any data loggers, single phase and poly phase. Are there any controll devices for residential use were you can read the voltage, current , active power,reactive power, power facter. and on these readings switch power devices on and of as required.
[...] (more here) [...]
I am looking fro a device that woudl let me monitor electric motors ranging from 5 to 400 HP in a plant environment.
can you offer advice and direction?
Bill
It is apparent you are serious about your education on this topic and I commend you for that. Coming from a manufacturing background where automating system information to keep tabs on how the production line is functioning was the norm, it is interesting to see some of this technology be “transferred” to very appropriate every day use for the consumer. This information must be utilized to make some critical decisions about our future or at least what future we create for ourselves. Too bad so much of it is manufactured overseas due to “low cost”. I read your other blog topic and agree wholeheartedly. Keep up the good work. More should appreciate your efforts and learn from them. Education will again be the savior of our country.
Hello webmaster, I found your blog on Google while searching for Whole Sale Air Conditioning andsome other things and your post regarding gy Saving Devices to put Your House on a Diet was intersting. I have added you to my Digg account.