Manufacturer | Sense |
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Part Number | NFBB-ASSY |
Item Weight | 3.16 pounds |
Product Dimensions | 7 x 7 x 9 inches |
Country of Origin | Mexico |
Item model number | NFBB-ASSY |
Color | White |
Style | Flex Energy Monitor |
Item Package Quantity | 1 |
Included Components | Power Cable, 2 Sets of Current Sensors (4 pcs), Sense Home Energy Monitor, Mounting Bracket, Antenna |
Batteries Included? | No |
Batteries Required? | No |
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Sense Flex Home Energy Monitor
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
- COMBINES THE SENSE MONITOR AND FLEX SENSORS, allowing you to monitor up to two 120V/240V circuits, monitor your generator, solar, or 400A split-service system.
- SENSE SAVES: Sense saves you energy and money by providing insight into your home's energy use and activity. NOW SUPPORTING TIME-OF-USE RATE PLANS.
- SEE WHAT’S UP. KNOW WHAT’S ON: Track how much electricity you’re using, what time your kids got home, or when someone leaves the basement light on. Sense identifies patterns in your energy use to help your family be more efficient, informed, and secure.
- MONITOR YOUR HOME’S ENERGY USE FROM ANYWHERE: Real-time data through our iOS, Android, and web apps.
- AVOID DISASTER: Set custom notifications for critical devices, like your sump pump, well pump, or flat iron. Sense is not currently available or compatible outside the United States and Canada.
Customer ratings by feature
Frequently bought together
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From the brand
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Understanding how much energy your home is using, when and where, empowers you to find savings. The average user saves 8% on their electric bill.
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Which is right for you?
Scroll to find out.
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Sense Flex
Our most comprehensive energy monitoring system. Monitor main energy plus: dedicated circuit OR generator OR 400A split-service.
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Sense
Our base model for non-solar homes.
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Sense Solar
Monitor energy use and solar production. For homes with solar power systems.
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Sense’s mission is to reduce global carbon emissions by making homes smart and efficient. We make it easier for people to take care of their homes and to actively participate in a cleaner, more resilient future.
Product guides and documents
Product Description
Add One of Four Capabilities with Included Flex Sensors
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Dedicated circuit monitoringTrack up to two 120V or 240V circuits. It’s the best way to track devices like your HVAC system, EV charger or variable speed pumps. |
400A split-serviceWhole-home monitoring for homes with split-service 400A electrical systems, more common in newer, larger homes. |
Standby generatorsIf your power is interrupted, Sense can tell you when your back-up generator takes over and how much energy the home is using. |
Solar monitoringSense Flex includes a second set of sensors, like Sense Solar, which can also be used to monitor solar production in the very same way. |
Monitor Your Home's Energy Use From Anywhere With The Sense App
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Save Energy and MoneyUnderstanding how much energy your home is using, when and where, empowers you to find savings. Sense gives you the tools to break it down and take action. |
See What’s OnGet a view into your home you can’t get anywhere else. See when the garage door opened, the television turned on, or when the dryer finished its cycle. Sense can monitor many devices, but we can’t ensure it will track everything. Certain devices may not be detected due to their unique signature, like low-wattage LED light bulbs or variable speed motors in certain heat and pool pumps. |
Avoid DisasterSure, it’s convenient to know when certain devices turn on and off, but it may just save your house, too. Heavy rains? See if your sump pump is running, or running too much! Think you forgot to turn off the oven? Set an alert to inform you if it’s been on for over an hour. |
Track Time-of-Use RatesAs Sense tracks your home’s energy, it begins to recognize most appliances and other devices that use more than 60 watts. Typically the Sense monitor detects 12 devices in the first month after it’s installed and 25-30 devices after 12 months. |
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Machine Learning Device DetectionAs Sense tracks your home’s energy, it begins to recognize most appliances and other devices that use more than 60 watts. Typically, the Sense monitor detects 12 devices in the first month after it’s installed and 25-30 devices after 12 months. |
Useful IntegrationsSense integrates with select IoT devices to give you more control, with your voice or inside the Sense app. See what’s possible when you link Sense with Hue, Amazon Alexa, Google Assistant, and smart plugs from TP-Link/Kasa and Wemo. |
Rigorously Tested For SafetyAny device inside your electrical panel should be designed and certified to meet the highest safety standards. In addition to extensive in-house testing, the Sense monitor has been tested to UL and IEC standards for safety and certified by ETL/Intertek as safe to install in your electrical panel. |
Sense Home Energy Monitor | Sense SOLAR Home Energy Monitor | Sense FLEX Home Energy Monitor | |
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Customer Reviews |
4.1 out of 5 stars
2,948
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4.0 out of 5 stars
822
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3.8 out of 5 stars
327
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Sensors (2 per pair) | 1 pair | 2 pairs | 2 pairs |
Compatible with: | Homes without solar systems | Homes WITH solar systems | ONE of the following applications |
Solar | No | Yes | Yes |
400A split-service | No | No | Yes |
Generator support | No | No | Yes |
Dedicated Circuit Monitoring | No | No | Yes |
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Videos
Videos for this product
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Hunting Energy Hogs with Chris H.
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What is Machine Learning?
Sense
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0:31
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2:20
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Customers Justin and Mara Mitchell on Why Sense Makes Sense
Sense
Product information
Technical Details
Additional Information
ASIN | B08N5GWZWQ |
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Customer Reviews |
3.8 out of 5 stars |
Best Sellers Rank | #38,317 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #2 in Home Automation Modules |
Date First Available | November 12, 2020 |
Warranty & Support
Feedback
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers have negative opinions about the value and connectivity of the home lighting accessory. For example, they say it's a waste of money and constantly disconnects. They dislike the detection and disagree on energy usage, support, ease of installation, performance, and accuracy.
AI-generated from the text of customer reviews
Customers are mixed about the performance of the home lighting accessory. Some mention that it works better than expected, the app works surprisingly well, and it offers a convenient and effective solution for keeping power costs in check. However, others say that it does not work well with the ones it does detect, it stopped working after 4 months, and that it's not actually very useful.
"...1. Does support but does not work well with Dual Panels. Struggles to identify new devices.2. Documentation is great if it matches your issue...." Read more
"...the Sense Flex Home Energy Monitor offers a convenient and effective solution for keeping power costs in check." Read more
"...It just doesn't work well at all." Read more
"...This seems to do a great job and does half decent at figuring out what different loads are...." Read more
Customers are mixed about the ease of installation of the home lighting accessory. Some mention it's extremely easy to install, simple, and intuitive. However, others say the instructions did not help, setting up was a pain, and takes too long to learn. The problem is with the programming or algorithm they use.
"...The device's user-friendly interface and the detailed breakdown of energy usage make it a valuable investment for anyone looking to have better..." Read more
"...Due to the message "cannot talk to server", I was not able to set up an account for EITHER device without assistance..." Read more
"...The app is very nice and intuitive, and it breaks down your energy usage very well...." Read more
"...Now on with my experience and lessons learned. Instructions are well written but like the marketing materials have some serious holes...." Read more
Customers are mixed about the energy usage of the home lighting accessory. Some mention that it does a very nice job of monitoring power usage in your home, and is a great addition to monitor energy usage. However, others say that it has network error and is not recording the amount of power their house is using.
"...The "meter" function shows you real-time usage. In my case, I was able to see just how often my sump pumps were operating...." Read more
"...It is a 52 watt device, which I am still trying to hunt down...." Read more
"...Having the ability to track energy usage not only provides peace of mind but also allows for fair and accurate adjustments, such as rent charges, if..." Read more
"...It is super accurate at measuring my energy usage, and it is dead accurate compared to what my utility says that I’m using...." Read more
Customers are mixed about the accuracy of the product. Some mention that it provides very accurate readings, while others say that it's not super accurate and gives inaccurate reports.
"...energy usage not only provides peace of mind but also allows for fair and accurate adjustments, such as rent charges, if power consumption becomes..." Read more
"...My raw numbers are way off. So I look in the Sense app and see that one of my CT clamps reports 0...." Read more
"...It is super accurate at measuring my energy usage, and it is dead accurate compared to what my utility says that I’m using...." Read more
"...has discovered several devices but many of the devices that were discovered were incorrect...." Read more
Customers are mixed about the support for the home lighting accessory. Some mention that it provides great information and documentation, while others say that the tech support is abysmal and expect about 1 response per day. They also say that there is no support and that the integration with Home Assistant is mediocre at best.
"...The support is offshore, and I'd rate it mediocre at best. I am sure the support people are not too knowledgeable with regard to power...." Read more
"...Struggles to identify new devices.2. Documentation is great if it matches your issue. Great self service.3...." Read more
"...Done. Wait some more, move the clamp a few more times, no tech support. So now I can't even get an accurate reading as to basic electrical usage...." Read more
"...Purchased this solely because the marketing information was the most refined...." Read more
Customers are dissatisfied with the detection of the home lighting accessory. They say that it is not able to detect devices, and the technology to identify them does not work. Some customers also mention that the unit hardly recognizes any electronics accurately. Overall, customers are not happy with the product's detection capabilities.
"...There are some devices that Sense still is not able to detect - even after years of use...." Read more
"...1. Does support but does not work well with Dual Panels. Struggles to identify new devices.2. Documentation is great if it matches your issue...." Read more
"The Sense Flex Home Energy Monitor has proven to be an invaluable tool for monitoring and managing my home's power usage...." Read more
"...why I purchased thus one instead of other ones, but it’s really bad at identifying things, it shouldn’t take a year to figure out what my electric..." Read more
Customers are dissatisfied with the value of the home lighting accessory. They mention it's a waste of money, not worth the money, and a terrible product. The gimmick is flawed and not as smart as it claims. Customers also say the cost was not justified and they're returning it before the 30 day time expires.
"...received no tech support, no community support and apparently a defective product I've ordered a new one and we'll see how it works when I get it...." Read more
"...Overall I am neutral about the product and it is an expensive proposition if you cant regain the initial investment through energy savings...." Read more
"...It's pretty disappointing and now I'm on the fence about keeping it, just putting it in the back of a junk drawer or finding someone else who wants..." Read more
"...devices, which is one of their selling points, it’s still great for helping you save money by figuring out where you’re using power that you don’t..." Read more
Customers are dissatisfied with the connectivity of the home lighting accessory. They mention that it struggles to stay connected, constantly disconnects, and wouldn't connect through the app. The sensing device would connect and then drop. The monitor goes offline every 2 hours and requires manual pairing. Customers also report that the monitor starts to quit working.
"...SECOND: When setting them up, BOTH TIMES I got a message "cannot talk to server"..." Read more
"...I when it started getting cold, I was noticing that my monitor started to quit working...." Read more
"...The sense device would connect and then drop. Dozens of attempts... did I mention I spent hours on this?..." Read more
"...The unit would not connect through the app. Reached out to the support chat. Was immediately referred to “email tech” team...." Read more
Reviews with images
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Top reviews
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I purchased both of these units with extra probes. One set for solar, and one for a dedicated hot tub circuit at the other house. In BOTH cases, NEITHER DEVICE would recognize the load on the second set of probes. About 2 days later, the unit installed with solar finally self-recognized the solar panel circuit and started working. However, despite following the instructions exactly, the probes set up to monitor a hot tub dedicated circuit would NOT work (meaning the unit will not recognize the load). How it cannot detect a five thousand watt load is beyond me. After 4 days it still won't recognize the load. I find this unsatisfactory also.
The good: Once it starts working, the unit does a very nice job of monitoring power usage in your home. It takes it a while to learn what devices are, to be expected. One nice thing, you can "export" data to Excel for more detailed tracking and analysis. The "meter" function shows you real-time usage. In my case, I was able to see just how often my sump pumps were operating. So, once installed, I am pretty happy with the unit. The interface has some nice graphics that allow you to see what various devices use, how much solar is offsetting the grid draw, etc.
I would suggest that Sense engineers clean up some of the installation issues (the app issues). Especially for units that monitor a second circuit (solar and/or a dedicated circuit). Neither of my units would detect the second circuit load despite following instructions exactly. Due to the message "cannot talk to server", I was not able to set up an account for EITHER device without assistance (this is totally unsatisfactory). Also, the "help" is via e-mail; there is no "chat" to get a more immediate response. The support is offshore, and I'd rate it mediocre at best. I am sure the support people are not too knowledgeable with regard to power. One technical thing that would be nice to display: power factor. Certainly this would be easy to add (it’s good info for people who are into power engineering).
Note: I am an electrical engineer with 50+ years of experience, including 30+ years of power engineering. Physically installing the unit was easy for me; however, for most, it should be left to a pro.
Having the ability to track energy usage not only provides peace of mind but also allows for fair and accurate adjustments, such as rent charges, if power consumption becomes unusually high. The device's user-friendly interface and the detailed breakdown of energy usage make it a valuable investment for anyone looking to have better control and understanding of their home's power consumption. Overall, the Sense Flex Home Energy Monitor offers a convenient and effective solution for keeping power costs in check.
To start... I get the unit, open up my panel and install the device per the instructions. For install with a generator the diagram clearly shows the Flex CT Clamps on the utility side (service main) before the ATS and the main CT Clamps between the ATS and the load. Then we get to the written instructions which say to clamp the main CT clamps to the service main. Welp ... the diagram shows the Flex CT clamps connected to the service main but in writing they tell you to use the main CT clamps... Moving along! Next in writing they say that you need to connect the Flex CT to the "service line" which they show in the picture as the service main. But wait, they also say that you can connect to the generator lines that feed the ATS. Well those are completely different lines. So which is it? Well come to find out after extensive shuffling around in the panel the Main CT's need to go between the ATS and the Load and the Flex CT's need to go between the generator and the ATS. If it's any different you either get a reading of 0 or it thinks the generator is always on. To make everything so much more interesting, every time you reconfigure the CT clamps you have to data reset otherwise the device doesn't realize that you've moved things around.
So now that we got the install sorted out... Time to watch the magic, or in my case, the lack of magic. Once the device is installed it's supposed to go through a signal detection phase where it starts at 0% and works its way up. Two days later I'm still stuck at 0. So I contact support. That was useless because 2 more days and there's no reply. The "community" forum is active with employees almost every hour, they are all over twitter, but it appears that no one can help you when you file a tech ticket. So I go to subscribe to the forum because that's where everyone is. Welcome to the forum, where you can't post anything until we "trust" you will be a good citizen of our lovely forum which could take days. They actually send you a message stating that when you sign up. So, strike 2. Let me call them, nope, they don't have a phone number. Strike 3, I'm done.
So here I am analyzing the data to see if there's something I missed and I start to compare the Sense to the utility company. My raw numbers are way off. So I look in the Sense app and see that one of my CT clamps reports 0. I go out to the panel, give it a tap with my fist, and off we go reporting numbers again... until tomorrow, rinse and repeat. So do I have a defective CT? Maybe, let me add that to my ticket that no one will reply to. Done. Wait some more, move the clamp a few more times, no tech support. So now I can't even get an accurate reading as to basic electrical usage. This is pure khW used in a day. Even the last monitor was able to get the baseline number right.
Since I received no tech support, no community support and apparently a defective product I've ordered a new one and we'll see how it works when I get it. My hopes aren't so high anymore. I'll report back with updates once I receive the new unit. Many of the reviews on here are post install when they have reporting and detection issues. I haven't been able to get that far, so I'll have more to report in due time.