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Refoss

Refoss Smart Home Energy Monitor Real-Time Electricity Usage Monitor with 16x60A Circuit Sensor Energy Meter Local Data Storage

4.4(21)
$249.99

871+ bought in the past month

Sobre este artículo

  • Comprehensive Home Energy Monitoring: Monitor your home’s real-time electricity usage with 2 main circuit sensors (up to 200A each) and 16 branch circuit sensors (up to 60A each). The easy clamp-on design supports single-phase 2-wire, split-phase 3-wire, and three-phase 4-wire Wye (TN or TT) systems (excluding Delta), making this home energy monitor ideal for smart energy management.
  • Local Control & Privacy: Access your electricity usage through Web UI, Open API, and MQTT protocols without relying on the cloud. Integrate seamlessly with Home Assistant or other smart home platforms for local control. Local data storage ensures your energy data remains private while still supporting advanced home energy management and automation, allowing you to freely set automation rules and control every kWh of electricity usage.
  • Smart Automation & Solar Zero Feed-In: Native Home Assistant integration and Refoss App automation allow you to automate, manage, and control your home’s real power. Surplus solar and net metering energy can be directed to medium-power appliances like heat pumps, dishwashers, and microwaves, while time-of-use and peak demand energy management ensures maximum solar self-consumption, prevents low-value grid feed-in, and reduces utility bills.
  • Advanced Data Analytics & Smart Alerts: The EM16P smart power meter records minute, hourly, daily, weekly, monthly, and yearly energy usage, with daily data securely stored in the cloud for up to 5 years and fully exportable without any subscription. Receive smart alerts when appliances exceed normal consumption or peak usage, such as if a fridge or washing machine consumes unusually high energy, allowing you to promptly check or adjust usage habits. Detailed reporting helps households identify waste, optimize energy efficiency, and save 10%-20% on electricity costs.
  • Real-Time Electricity Data: Provides 24/7 monitoring of voltage, current, active power, and power factor with ±1% accuracy (200A: 2–200A; 60A: 1–60A) and ±2% at low current. Track energy usage of kitchen ovens, water heaters, dryers, central AC, and EV chargers. Optimize energy consumption, save costs, and manage your home efficiently with this smart home energy meter.
  • ETL Certified & Reliable Performance: ETL certified and compliant with UL 61010 safety standards for safe installation and reliable operation. Built with high-quality clamp-on CTs and backed by a 2-year warranty with customer support, it’s a dependable power consumption meter for long-term energy management.

Key details

color_spec
‎‎Orange+White
manufacturer
Refoss
color
Orange+White
included_components
Home Energy Monitor, WiFi Antenna Assembly, 200A Current Transformers x 2, 60A Current Transformers x 16, 3.5mm Insulation Plugs x 2, 2.5mm Insulation Plugs x 16, Wire Nuts x 3, Extra Wires x 3, Wire Harness, User Manual
batteries_included
No

Technical specifications

item_model_number
EM16

Item information

batteries_required
No
warranty_description
2 Year Manufacturer
best_sellers_rank
#103,919 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #14 in Home Automation Modules
date_first_available
December 11, 2025
Highlights

About this item

  • Comprehensive Home Energy Monitoring: Monitor your home’s real-time electricity usage with 2 main circuit sensors (up to 200A each) and 16 branch circuit sensors (up to 60A each). The easy clamp-on design supports single-phase 2-wire, split-phase 3-wire, and three-phase 4-wire Wye (TN or TT) systems (excluding Delta), making this home energy monitor ideal for smart energy management.
  • Local Control & Privacy: Access your electricity usage through Web UI, Open API, and MQTT protocols without relying on the cloud. Integrate seamlessly with Home Assistant or other smart home platforms for local control. Local data storage ensures your energy data remains private while still supporting advanced home energy management and automation, allowing you to freely set automation rules and control every kWh of electricity usage.
  • Smart Automation & Solar Zero Feed-In: Native Home Assistant integration and Refoss App automation allow you to automate, manage, and control your home’s real power. Surplus solar and net metering energy can be directed to medium-power appliances like heat pumps, dishwashers, and microwaves, while time-of-use and peak demand energy management ensures maximum solar self-consumption, prevents low-value grid feed-in, and reduces utility bills.
  • Advanced Data Analytics & Smart Alerts: The EM16P smart power meter records minute, hourly, daily, weekly, monthly, and yearly energy usage, with daily data securely stored in the cloud for up to 5 years and fully exportable without any subscription. Receive smart alerts when appliances exceed normal consumption or peak usage, such as if a fridge or washing machine consumes unusually high energy, allowing you to promptly check or adjust usage habits. Detailed reporting helps households identify waste, optimize energy efficiency, and save 10%-20% on electricity costs.
  • Real-Time Electricity Data: Provides 24/7 monitoring of voltage, current, active power, and power factor with ±1% accuracy (200A: 2–200A; 60A: 1–60A) and ±2% at low current. Track energy usage of kitchen ovens, water heaters, dryers, central AC, and EV chargers. Optimize energy consumption, save costs, and manage your home efficiently with this smart home energy meter.
  • ETL Certified & Reliable Performance: ETL certified and compliant with UL 61010 safety standards for safe installation and reliable operation. Built with high-quality clamp-on CTs and backed by a 2-year warranty with customer support, it’s a dependable power consumption meter for long-term energy management.
Close-up view of the Refoss Smart Home Energy Monitor Real-Time Electricity Usage Monitor with 16x60A Circuit Sensor Energy Meter Local Data Storage
Details

Materials and maintenance

dimensions
‎4.5 x 3.5 x 1.1 inches
weight
‎4.27 pounds
item_weight
4.27 pounds
product_dimensions
4.5 x 3.5 x 1.1 inches

De la marca

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Product videos

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Customer reviews

21 reviewsPositive

Rated 4.4/5 across 21 reviews — well received overall.

  • 86% of sampled reviews are from verified purchases.
  • 71% of sampled reviews give 4–5 stars.

Customers say

Customers find the energy monitor easy to install and appreciate its integration with Home Assistant.

Generated from the text of customer reviews

Reviews with images

Customer review image for Highly recommendCustomer review image for Highly recommendCustomer review image for Highly recommendCustomer review image for Highly recommendCustomer review image for Great for viewing individual energy usage
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★★★★★

Highly recommend

Really impressed with this energy monitor so far. Setup was easier than I expected, and once it was installed I could immediately see my home’s power usage in real time. It’s honestly eye-opening to see exactly where electricity is going. Super easy install. Took me 15 minutes from start to finish! What I like most is being able to track individual circuits — it helped me quickly identify a couple of appliances that were using way more power than I realized. The app/interface is simple to use, and I also appreciate that it works locally and integrates nicely with Home Assistant. Build quality feels solid and everything works as advertised. Since installing it, I’ve already started making small changes that should help lower my electric bill. If you’re curious about your energy usage or want more control over it, this is definitely worth it. Glad I bought it! Read more

Customer review image for Highly recommendCustomer review image for Highly recommendCustomer review image for Highly recommendCustomer review image for Highly recommend
Reebesh SharmaVerified purchase
★★★★★

Awesome Tech!

I bought the Refoss Smart Home Energy Monitor because I wanted a better idea of where the electricity in my house was actually going. Every month the bill shows up, but it never really tells you what’s using the power. This device helped answer that question. After getting it set up, I was able to see how much electricity different parts of the house were using and when that usage was happening. It didn’t take long to start noticing which appliances were pulling the most power. Being able to see the numbers makes it much easier to track down what’s driving your electric usage. From what I could see, the installation itself looked fairly straightforward, but I personally had an electrician handle it. It requires working inside the electrical panel, which is something I’d rather leave to someone who does that for a living. Because of that I don’t have installation photos. I asked the electrician to grab one while he was doing the work, but he forgot. Once everything was running, the information was easy to follow and it’s interesting to check in and see what’s using power at different times of the day. If you’re curious about where your electricity is going or trying to get a better handle on your household energy usage, this is a useful tool to have. Bottom line: It gives you a clear look at what’s actually using electricity in your home, which makes it much easier to understand your power usage instead of just guessing from the monthly bill. Read more

HeavyleadedVerified purchase
★★★★★

Easy install, good instructions, quick arrival great value

So far so good The packaging came quickly well packaged directions are clear my app picked it up quickly install was easy. I have it installed alongside and a duplication with another vendors to compare the outputs. I like the apps simple use I've integrated it with home assistant and my intent is to do energy demand control as I have electric baseboard heat that uses Meross smart thermostats Read more

wyodoc1Verified purchase
★★★★

Important to know about "A", "B", and "C" voltage sensing for US split-phase power.

You can tell this was intended for 3-phase power consumption because the 18 sensors are split into 3. Each group is called "A", "B", or "C", each contains a group of 6 current clamps, and each should be paired with the corresponding voltage sensing wire. This is fine if you have three phase because you have a voltage sense wire for each phase. When working with US split-phase power, this means you really can only monitor 12 circuits on one leg and 6 circuits on the other. If you want to monitor 9 circuits on each of 2 legs of split-phase power, some of those "C" group current clamps will report slightly inaccurate power (because voltage sense will be on the "wrong" leg for those sensors. Not a HUGE deal, but be aware that the power readings might be slightly off due to mismatched voltage sense for those circuits if you put 9 on each leg. Read more

BENJAMIN K TIEFERTVerified purchase
★★★★★

Works great with Home Assistant

Works great with Home Assistant. Read more

Jarrod ClarkVerified purchase
★★★★★

Great for viewing individual energy usage

Overall, this is a good product and great for monitoring electricity usage. Install: The installation isn't that bad. First and foremost, be sure to turn off the main breaker to the house before doing anything. There is a lot of electricity in that fuse box, and you don't want any of it outside that box! Second, you'll need a little bit of room in your fuse box. If the box is currently a giant mess or overly full, you're going to struggle to get this in there as well. Assuming you have room, then it's just a matter of clipping on leads to the wires of the circuit you want to monitor, plugging them into the energy monitor and then turning everything on. I will say, if you have multiple circuits on a single fuse, even if they have their own breaker (like the top left breaker in my picture), there's no point in putting leads on both lines. Just pick one and then go into settings and change the circuit factor to 2. Once everything is installed, just tidy it up a bit and you'll be good to go. Operation: The energy monitor is a great tool for letting you know how much electricity certain circuits and items within your house are using. For a numbers geek like myself, this is heaven. You can find ways to cut down on costs and determine what's not worth fighting the family over (leaving that LED bulb on isn't the end of the world!). You can see things like your fridge cycle on and off, letting you know how long and how often it's working to keep things cool. If you notice it's cycling too frequently or staying on too long, you might be due for a cleaning around the intake or even a replacement of the fridge. What now: So now that it's installed, you've played with it for a couple of days and have an idea of what's using your electricity and how much. So what now? Well, that's a great question. You CAN set up warnings/notifications if a circuit goes above or below a certain threshold (set your main to <1 Watt. If it triggers, that means you've lost power to your home. Great for when you're away from home and need to worry about a fish tank or something else). Also, because this unit has leads that go to specific circuits, it's easier to monitor specific items or areas. If you've got an energy hog, you'll be able to pinpoint what area of the house it is on pretty quickly. What you CAN'T do is label individual items within a circuit. So circuit A2 might be your kitchen. With everything else off, the only thing you see consuming electricity is your fridge as it cycles. Great. But once you start to turn on the lights, use the stove, plug in your charger, use the dishwasher or garbage disposal- those things all comingle into one single number. I'd love to be able to label or isolate known values on a circuit so it is easier to separate out individual items. Instead of just seeing a number or graph showing 701W, I'd like to be able to click on it and know that the fridge is consuming 72W, the stove is using 300W, and the microwave is using the rest. Perhaps something like that will come in an update down the road. Final note: Please be aware, the unit can monitor a total of 14 fuses + your 2 mains (assuming the standard 2 phase US system). Depending on the size of your fuse box, you might have to choose which fuses to monitor. You'll still know the total amount of energy being used because of the mains, but you may not see individual usage on circuits that don't have a lead. Read more

Customer review image for Great for viewing individual energy usage
Nicholas W.Verified purchase
☆☆☆☆

Modal popup on connection failure - Bad design. Bad programming.

Modal popup on connection failure - Bad design. Bad programming. Read more

CWalton
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