Smart Home Energy Monitor Supports Home Assistant, Real-Time Accurate Energy Consumption Tracking, Electricity Usage Monitor with 16x60A Circuit Sensor, 36-Month History, Solar Metering, ETL Certified

I’ve been using the Refoss Smart Energy Monitor for a week now, and I’m thoroughly impressed. One of the standout features is its local integration with Home Assistant, which is precisely why I chose this energy monitor. The instructions were straightforward, and the video on the Amazon listing was particularly helpful, guiding me through the entire installation process. It should be relatively easy for anyone with basic electrical knowledge and some handy skills. However, I recommend doing some pre-planning before installation to determine which circuits you want to monitor. There are five L1 circuit sensor, five L2 circuits sensor, and six circuits sensor that can be used on either L1 or L2. You’ll need to choose one or the other. Additionally, you can combine some circuits and use one clamp for them, as long as they don’t exceed the current limit of the circuit sensor. For instance, I combined two kitchen outlets into one, saving me a sensor I used for monitoring a different. For balanced 240V loads like an AC unit or an EV charger, you can use one clamp and then change the circuit factor to 2 in the Refoss app or create a helper in Home Assistant that multiplies the energy usage by 2. This is because with balanced loads, the energy drawn on both lines is the same, which is why it’s called a balanced load. This way, you can save a sensor to monitor another circuit. I highly recommend making a note of which sensors are connected to which circuits to avoid wasting time trying to remember where you connected them. Setting up the energy monitor on the app was a breeze. I simply downloaded the Refoss app, followed its instructions to connect it to Wi-Fi, and updated the software of the energy monitoring module. The Refoss app allows you to monitor live energy usage for each connected circuit and view a history of energy usage for each circuit, broken down by day, week, month, and year which is awesome for using the app on its own. Connecting to Home Assistant was equally easy. I searched for the Refoss add-on, and the energy monitor was automatically detected on my network. It brought over all the entities shown in the Refoss app and then I got to setting up everything in home assistant. Overall, I highly recommend this affordable and reliable whole-house energy monitoring system. If you use Home Assistant, this is one of the best options out there that is supported natively through the Refoss addon.

The popularity and availability of energy monitors has exploded in recent years which makes sense as electric rates have increased along with an increasing awareness of the importance of being more energy conscious. I have a solar system with Enphase micro inverters which gives me a whole house overview of consumption at the meter but it's only a sum of all of the circuits. So far I had been holding off on a more granular solution and waited for the market to mature a little more. Until now. This Refoss system gives that next level of detail and allows viewing of each individual circuit. My house is a little different as everything is electrified including two electric cars so I have a pair of 200A panels instead of a more common single 100 or 200A panel. That means to cover everything I need two of these units as each has a separate 200A feed. I don't know if there is enough capacity to support a single 400A feed but the main current sensors have some extra space so it may fit. But I can confirm that they work perfectly on the 200A feed. Installation is very easy and is plug and play without needing any contact with the conductive parts of wires with the exception of the power supply to the unit itself. It's most convenient to install it on a dedicated breaker which is what I did. Other than that, all of the sensors are added to existing wires without having to touch any energized contacts or disconnect anything. It's extremely easy. On the other end they plug into the main box. The wires are long which means they'll reach from anywhere and it does mean that there will be a bit extra more than necessary inside the panel but it's all hidden with it closed. It's the compromise to having plug and play connections which I prefer over having spring contacts that can work loose and be less reliable and with higher impedance. The sensors themselves are extremely high quality with mirror finished faces that mate up firmly which means they'll be quite accurate. The app works well and unlike my Enphase app gives per-connection details. As others have noted I wish it could be configured with a custom map and labels based on a photo of the panel even, but it's perfectly functional as it is.

Have this product managing power usage in out house along with the Homeassistant management software. It took about 2 hours to plan out and install. While I was comfortable doing the work myself as an electrical engineer. I wouldn't recommend it for most DIY folks unless they are able to completely disconnect their main outside the house before the breaker box. Wifi connection worked great. VLAN automatically setup with no issues. Size was good for my breaker box, not sure if it would be as easy for an older or smaller box. Two issues I had, the install is a total mess of wires... it wasn't that easy to clean up. Wish there was a way to integrate current monitors into the breakers themselves. Second issue is the current readings were ALL backwards, despite following the directions to a T. Fortunately you can toggle this by adjusting your multiple from positive to negative in the app. Unfortunately thats annoying to do because of some android bugs making it hard to type "-" in their app? Look is ok if you don't mind the rats nest of orange wires in your breakerbox. Cost seems appropriate given the components included. Just wish they included another 5-10 breakouts to cover a full box, or at least the capacity to add them from an expansion kit. Kit should be durable and last for years with no major moving parts. Curious to see how well the plastic clips hold out over the years if I have to move it ever...

Great device! I upgraded from an older unit that only had 2 leads for the mains. I was able to installed in about 30-45 minutes. It was pretty straightforward, the directions were clear. It seems like it’s very well made. It was a little challenging to find a place in the electrical box, but I did find a place for it in there eventually. It looks much nicer than my older unit as this one is contained in the electrical box and is powered by tapping into a breaker. Super clean look and you can’t tell it’s there aside from the antenna. The app works well and it was easy to get connected to WiFi and HomeAssistant! I’ve had issues with a few device due to mesh network and had to tinker with configs and settings in my router. Now I can set alerts, monitor, and automation tasks a little more granular. This thing is solid! My only complaint is that I didn’t have enough leads to monitor each breaker. If you have anything running on 220 it likes 2 leads (but you can use 1 and change a setting to “calculate”, it’s just not as accurate using a single lead). I was still short a few leads using the single leads on the 220 breakers. You call still get the overall usage that you are consuming from the one that connect to the mains., so it’s not really that big of a deal.

Refoss Smart Home Energy Monitor Published on December 1, 2025 Unboxing Experience Opening the box reveals a well-organized layout with each component securely packed. Inside, you’ll find: • Main Monitoring Unit – the hub that connects to your breaker panel • Current Transformers (CT clamps) – two large clamps for mains and smaller ones for individual circuits • Wi-Fi Antenna – for wireless connectivity • Power Harness & Cables – essential wiring for installation • Quick Start Guide – safety instructions and setup steps !Unboxing Layout First Impressions • Build Quality: The unit feels solid, with a smooth finish and durable CT clamps. • Design: Minimalist and functional, with clearly labeled ports for easy installation. • Safety Notes: The manual strongly advises turning off the main breaker before installation and hiring a professional if you’re not comfortable working inside a panel. !Components Close-Up Firmware Update Tip Before you proceed with the final installation, it’s a great idea to update your Refoss EM16 firmware. Doing this early ensures you have the latest features and bug fixes. Temporary Power Connection Guide Here’s a safe and effective method to power the device for firmware updates using a standard 110V cord: 1. Prepare a Cord: Use a standard US power cord with a plug. Internal wires should be: ○ Black (Hot) ○ White (Neutral) ○ Green (Ground) 2. Connection Method: ○ The device is powered through the black voltage sensing wire (La). ○ For stability, connect all three voltage sensing wires together to the Hot line (Black, Red, Blue from the Refoss harness). § Twist them securely with the Black (Hot) wire from your power cord using a wire nut. ○ Connect the White (Neutral) wire from your power cord to the White (Neutral) wire from the Refoss harness. ○ Insulate the Green (Ground) wire or connect it to a ground source for maximum safety. 3. Power On: Once all wires are securely connected and insulated, plug the cord into a 110V wall outlet. The device will power up safely for firmware updates. Performance & Features • Real-Time Monitoring: Tracks whole-home energy usage and individual circuits. • Data Insights: Helps identify high-consumption appliances and optimize energy usage. • Home Assistant Integration: Works well for automation enthusiasts. • Accuracy: Comparable to premium monitors at a fraction of the price. • App Experience: Functional but could be more polished; initial setup requires the Refoss app. Pros ✔ Easy clamp-on installation ✔ Supports up to 16 circuits ✔ Affordable and Home Assistant compatible Cons ✖ App dependency for initial setup ✖ Wi-Fi only (no Ethernet option) ✖ Advanced features require some technical know-how Final Verdict The Refoss Smart Home Energy Monitor is a cost-effective solution for whole-home energy tracking, ideal for smart home enthusiasts and anyone looking to optimize energy usage. If you’re comfortable with basic electrical work or can hire an electrician, this device offers excellent value and functionality.

Working great so far. Just got it installed a few hours ago. Install went pretty well. The instructions were well laid out and easy to follow. The monitor came very well packaged and was easy to assemble. The monitor box fit nicely inside my electrical panel. Once I turned the power back on and my Internet was powered back up then the unit was all ready to sync up to the app. The app is easy to use and allows you to name each of the monitors. The cables are nice and thick and durable, and the mounts were easy to close around the wires. I did need to install two new breakers into my panel for this to work, so if you don't have additional breakers you will likely need to order two along with this kit. It has a great wireless range thanks to the external antenna that comes with it. Everything is working great and reporting my power consumption. I would recommend this item if your looking to track your power usage. Great item!

My electricity bill fluctuates so much, that I wanted to be able to view the power usage in my house and see what I can do to turn off un needed devices. I looked at a few options, and the Refoss monitor kept coming up. I looked for one which could to all of my circuits, but the em-16 had the most for an affordable pric. I am able to do 16 circuits, which covers just about everything. Install was fairly straight forward. This device seems to be performing very will. I did have 3 circuits which showed negative power, even though the Circuit Sensors are installed correctly. I Simply changed the factor to -1 and that fixed the issue. I do however have a support ticket in with Refoss.. perhaps a few of the Sensors were wired backwares or something.. who knows. I do have Home Assistant installed and connected to the Refoss devices. It's cool to look at the Display on my Samsung Smart Refrigerator and see all of my power usage for the house

So far, the Refoss 16-channel power meter has been pretty solid. Install was straightforward, and the hardware feels high quality — about on par with Sense or other higher-end monitors I’ve used. My only small gripe on the hardware side is that it’d be nice if Refoss offered some CT clamp extension cables to help clean up wiring in a 200-amp panel. I have had no issue with the units integrated wireless receiver and it has been very reliable. The app itself is decent, but if you’re coming from Sense, it’s definitely a step down in polish. There’s no device detection or load learning, which feels like a weird omission these days. I’d love to see options to merge CTs in the app or have a bit of smart recognition when certain appliances (like the fridge or microwave) kick on. That said, this thing absolutely kills it with Home Assistant. That’s really where it shines. Setting up automations and triggers off individual clamp readings has been way more reliable than Sense ever was, and honestly, that alone makes it worth the upgrade. Overall, the Refoss delivers great hardware, accurate readings, and solid integration potential. The app could use some love, but if you’re the kind of person who enjoys tinkering and wants full control over your power data, this is a great pick.