A must-have device for tracking the energy consumption and cost ...
589401
A must-have device for tracking the energy consumption and cost of operation of household electrical appliances.
Using it you can justify the purchase of more energy efficient devices which may be ready to be replaced.
1806032
I bought one - when I opened it it appeared used, the screen was scratched and the battery was missing.  The software that comes with it on a mini-CD though not intuitive, is quite useful and the data logging seems pretty flexible. You need to connect the unit via USB to change the setting.  It looks like it will work well for my needs so I bought a second one.  This one looked new and had the battery with it.  Unlike one of the other reviewers, both of my work fine on battery power.  The battery door seems poorly designed but seems okay for a stationary application.

I am logging inside and outside temperatures of a storage container this winter to evaluate the effectiveness of a solar collector/heater setup in the container.  I am set up to record temperatures up to 166 days at 15 minute intervals (16,000 max points).  Two of these units were cheaper than a dual-input temperature data logger.  I'll post again in a few weeks with my results.
1884920
I picked up Neurio to find why our power bill was up from $40 too $100 over last year. My hunch was it's cold and we are running the furnace a lot. Turned out to be a combination of heat cable and appliances. Just know what to unplug/switch to smart outlets has brought our bill down. The app is well designed and easy to use.
1725337
AWESOME! I am SO impressed with this device and the data it provides. Happy with spending $64~ on the device and I'd be happier to spend $10/month I am and will spend the $20/month it costs to monitor my teen because of the amount of information and quality of the software. I just started using it Wednesday on my own car to learn about it in preparation for when my 15 year old teenage son gets his restricted drivers licence next month and will be driving on his own. Some of the things it does:
* When the vehicle starts
* When the vehicle is idle (for more than a minute or so)
* When the vehicle is turned off and for how long
* How fast the vehicle was going - you click on an arrow on the map and it'll tell you exactly how fast it was going at that exact spot. If it is an area that Google Maps has satellite images you can SEE that location.
* See where and when the vehicle accelerated fast or applied brakes too hard
* If the device was removed or tampered with - and it was SUPER easy to plug in. I'm was worried if I could do it but in my 2009 Focus anyone could do it.
* Set up perimeters or indicate landmarks if you want to know when the vehicle enters/exits specific areas (I indicated our home, his high school, church for evening events, football stadium, etc).
3991111
The USB meter is very useful , It makes it easy to see exactly how much amperage devices use in real time.
4935329
This is a great device to monitor the charging system and now that I have it sure taken out a lot of guess works or taking the meter and make reading, especially the current reading isn't practical for meter and probes.  Plug it in and play around with the arrows and it will display PV voltage a great function which allow me to switch from DC charging when voltage below biased voltage for AC grid tie (for AC solar panel equipped with microinverter).  It will display battery's health = State Of Charge and temperature and many other useful displays and it is light up everytime the key is pressed so no need for a flashlight to read it in the dark.

It is pricey and I don't know how long will this device last but it will make your life better at this experiment stage.
3459775
Anyone who cares about their power bill should have one of these. I have used this to analyze appliances and determine which ones really need to be replaced first. It is accurate (check it using a LED lightbulb). I am on my second unit cause the first got zapped in an electrical storm during an extended reading of a freezer(I believe). It didn't stop working, it just stopped reading accurately. I measured a LED lightbulb and it was measuring low by a few watts.
3586695
Ensupra Electricity Usage Monitor, Power Meter, Reduce Your Energy Costs very good quality and work like it suppose to. save your money
2273028
Does just what it's advertised to do and has allowed me to pinpoint some energy wasting items.  Using the P4400 I have been watching the usage of chargers and computers and some of the lights that don't need to be on.  In one month I reduced my energy consumption by 19% and my bill by 33% so the unit has paid for itself already.  Shipping was very quick and very reasonable.  I would have to say I'm a happy camper.
3505108
This device is well constructed, easy to install, and does exactly what it says it will do.  If you're looking for an energy monitor that compensates for power factor to give you the most accurate reading, this product is the best choice right now.

Unlike most other energy monitors, this product includes an AC/AC adapter that powers the transmitter and let's it track your line voltage for better accuracy. The adapter is molded on one end to insert directly into a knockout in your main breaker panel (see photo).  One wire coming from the adapter can be ganged onto an existing breaker and a second wire goes into an open slot on the neutral bar. The package also includes a bushing for a second knockout for the current sensor wires to exit the main panel.  Overall, it's a straightforward installation and the product includes everything you need.

I have both this and the OWL CM119A.  As far as construction and ease of installation, I'd say both are similar.  The Efergy TPM requires extra work to install the power transformer, but in exchange you get more accurate readings and don't have to replace transmitter batteries.  As another commenter mentioned, the current sensor lead wires are short, but they're about the same length for both devices.

I'm using both the Efergy and the Owl with a home-grown monitoring system on a Raspberry Pi computer with a usb rtl-sdr dongle.  People have posted code for decoding RF transmissions for both the Owl and the Efergy.  The Efergy uses a more sophisticated FSK modulation with a 16 bit CRC, while the Owl uses an Oregon Scientific v3 compatible Manchester encoding.  The Efergy protocol is probably more robust, but it requires some extra code compared to the Owl and may be a bit more cpu intensive on the Pi (my app uses 20% cpu decoding these two sensors along with 6 other temp/humidity sensors). The Efergy transmits at 10-20 second intervals, while the Owl transmissions are variable from 6 to 60 seconds depending on whether the current is changing.  Google efergy decode or owl decode for example decode routines.  My code is posted on github under rtl-wx.
423520
This device has an easy to understand information screen that can give added piece of mind to those that need it. I like seeing the load the device is carrying and how much time it can carry that load when the power is out. Power goes out frequently in my area and this thing has worked flawlessly. Our power usually only goes down for several seconds before coming back up so I have been able to just forge ahead as if the power was never interrupted. A worthwhile investment!
3689634
This review is for the Fit Meter accessory only. Now keep in mind that this device works in conjunction with the Wii Fit U software, so there are additional benefits (that come with the software) which won't be covered in great detail. These include detailed activity graphs and a few "minigames," but don't worry, much like this device they work fantastically well to track your activity and make it fun to do so.

Let's now focus on this device. For starters, it is only $20 msrp, which is very affordable as far as activity trackers go. There's quite a bit of tech packed inside including an accelerometer, 3-axis gyroscope, altimeter, thermometer, and a low-power display. Basically, it is designed to monitor virtually any activity you are engaged in and do so very accurately. So far my experience with it has absolutely confirmed that it does.... for the most part. Activities that involve more upper body work (like weight lifting) or activities like biking don't get recorded on this device, but there is an option to add it manually to Wii Fit U if you so desire. Other than that, it is very accurate as it takes into account not only steps, but also exercise intensity and elevation changes to give a rather accurate reading of how many calories you burn and METS you expend. The low-power display readout can show everything that the device records during the day, week, or several weeks depending on what info you're looking for - so the info is always at your fingertips.

Syncing the Fit Meter to Wii Fit U is as simple as it could get, with only a button to push then you're done. While it's probably for your benefit to sync it every day, the meter can store up to 7 days of altitude change and 28 days of steps/calories burned between syncs - handy if you're on vacation. A button cell battery is pre-installed, and while I can't comment on battery life just yet, it is easy to replace if necessary. In addition to the low-power screen there is an auto standby function too, so the device is very power conscious.

All in all, for the price of this device and the set of features it has packed inside, this purchase is a no-brainer. If you have a Wii U and balance board already, and buy this before the end of January you get Wii Fit U for FREE too! If you buy it after, or as an additional accessory for another family member, the value and usefulness of the Fit Meter are both so high that I would still wholeheartedly recommend you pick another one of these up. Thank you again, Nintendo, for helping us to stay really really good looking.
866541
Another nice gadget for a smart home.
We are participating in a project where you can get paid for energy you are not using during hours where so called peaker plants are active to supplement the electricity in a particular area. Those plants might not be the cleanest CO2 wise, and that is why there is an initiative on ohmconnect [dot] com where they monitor your smart meter and using this power genius, are able to switch off certain utilities during such peak events.
I have been able to earn back the costs of this device within a couple of months.
You hook this unit to your wifi, but the configuration is done through the wink app that actually flashes the screen of your phone/tablet and a light sensor on the power genius. *brilliant* (imho)
153559
I love this device. I never go a day with out wearing it at the gym. I use it to make sure I am in the "burning" zone and also a nice way to gauge your calorie disposal. Pair this with a food diary app and you're on your way to a healthier lifestyle.
2823547
Although it only has a few options and buttons, I just wanted a unit that would tell me the Watts and Amps. This handy little unit can also report Volts, VA, kWh, and a few other measurements. When I compared it with the expected loads, it seems pretty accurate, and so helpful to watch the readout. You can switch to other power units on the unit at any time it is plugged in. Excellent for planning, quick feedback, and curiosity.
848873
I rated the single device a bit ago; this is a two-pack of the same gadget. In short, get them.

They're super easy to install, work very well with our SmartThings home network, and are basically awesome. If anything I'd say they're a bit overkill with the deep analytics and insights - if you're looking for a simple on/off, then buy those receptacle gadgets that replace existing power outlets.

These have some additional capabilities that help you better understand your energy consumption profile and are a bargain at the price for what they offer.
4288215
Great device, very handy to have already, when I'm out on my bike or hiking for hours and I want to recharge the phone or GPS/HRM watch, the Earthspark is wonderful, lightweight, easy to use. Even if I need to charge my wife's phone or iPad at the same time as mine this little unit does a great job and quickly too. Priced well and in a robust metal case. The LED light has even proved useful. Thank You very much