

⚡ Empower your home, save the planet, and stay ahead of the energy curve!
The Fusion Energy SEM-Meter is a cutting-edge smart home energy monitor featuring 16 clamp-on 50A sensors that deliver precise, circuit-level power usage data in real time. Compatible with single, split, and three-phase electrical systems, it connects via 2.4GHz WiFi to provide live monitoring through a sleek mobile app with 1% accuracy. Designed for professionals who demand control and privacy, it supports offline operation via MQTT and Home Assistant integration, enabling actionable insights to reduce energy costs and environmental impact.








| Manufacturer | Fusion Energy |
| Item Weight | 3.72 pounds |
| Product Dimensions | 3.1 x 1.2 x 4.18 inches |
| Item model number | SEM-Meter |
| Color | Black |
| Style | 16 50A Circuit Level Sensors |
| Included Components | SEM-Meter 16 50A Circuit Level Sensors, 2 200A Circuit Level Sensors, 16 50A Circuit Level Sensors |
| Batteries Included? | No |
| Batteries Required? | No |
D**E
Great Product at An Awesome Price!
I've been using this for a while now. It's a great replacement for my old monitor with a lot of new features. Installation is easy and straight forward, the split current transfers make that very easy. The app works well and it's already set up for Home Assistant integration and the ability to use that as your server so no need to sed data out of your home. I had one small problem that tech support quickly and professionally took care of. I have 4 panels and lots of circuits to monitor so I will be buying several.
T**.
Simple and excellent design
This is great product and was very easy to setup and connect. I bought two as my panel is full. They combined and the 2nd ones large clamps even work as an additional input so I used them to monitor the feed to my shop. Within an hour of getting it all setup I found my power hungry circuit and resolved my excruciatingly high electric bill. The graphing works great too, you can graph individual circuits and zoom in and out on the per minute graphs. Couldn't be happier with these!
K**.
Perfect for a private home assistant setup
Very satisfied with this product! Excellent value for the price. I’ve been using it for a few months now together with Home Assistant, and it has worked flawlessly. As a European user, I found the documentation a bit US-oriented at first, so I had quite a few questions during setup. Their support team was outstanding — quick, detailed, and patient in answering all my concerns. Thanks to them, I now have a clear understanding of how everything works. They even sent me an extra part I needed for my European setup at no cost, which I really appreciated. My board has 28 circuits, but since circuits on the same phase can be combined, I was able to cover everything with the 16 clamps included. The measurements are very accurate — I compared them against some smart plugs with built-in power meters, and after several weeks of monitoring, the readings matched closely. Updating the firmware through the app was also a big plus. It allowed me to change the reporting interval from 30 seconds to just 2 seconds, giving me near real-time insight into my energy usage. I started out using their cloud integration with Home Assistant, but later switched to the private local setup. Everything now connects directly to Home Assistant without needing the internet — and the setup was much easier than I expected.
T**1
Great Smart Energy Monitor with Minor Accuracy Quirks
This smart home energy monitor has been a fantastic addition to my setup. Installation was straightforward, the app is intuitive, and I love being able to see real-time energy usage for the whole house. It's really helped me become more mindful about what’s using the most power and when. That said, I did notice a small discrepancy when comparing it to my utility power meter—the readings are consistently off by a few percentage points. Not a huge deal for general monitoring, but if you're looking for ultra-precise data, it’s something to keep in mind. This meter is usually 20-50kwh under what the power company meter says im using. Again this is not a huge deal at all to some Overall, it's a solid product with powerful insights and great functionality. Just shy of perfect due to the slight inaccuracy, but still absolutely worth it for most homeowners.
M**E
Extremely good function and value power monitor
App gives lots of data you can use to save on your electric bill. Data is also available via mqtt for your home automation server so automatic action can be taken as you want. Installation requires some electrical skill but is easy for folks who have changed circuit breakers and have done some residential wiring. The app is apparently designed by engineers, no marketing bs at all. When there is a power failure, you may see wonky data on startup. A way to tailor the length of the sensor wires would help during installation. These are just two minor inconveniences given the value it brings. Very cost effective. Mine has been installed for 11 months, working great.
E**O
not accurate and not easy to integrate with Home Assistant!
device is not reporting accurately values at all. tried working with their support but it did not result with any resolution but only emails going in circles exhausting. also very difficult to integrate with Home Assistant although it is listed as compatible with Home Assistant which makes you think it is simple plug and play - which is not. very disappointing.
S**N
Must-Have For Data-Driven Homeowners
This is a great tool for data geeks. I have an expensive residential electric bill. The data I have collected with this meter has helped me determine where my energy is going and allows me to monitor usage in real time. I live in Florida and have an older heat pump, so I was not surprised to learn that 45% of my usage is my heat pump compressor and 5% is my air handler. These measurements were taken during the summer. On the other hand, I was surprised to learn that my hot water heater is contributing to about 8% of my energy usage, which is more than I expected. If/when I replace the water heater, I now have data to justify spending extra on a more efficient water heater. I'm impressed at how accurate the data is. I compared the total usage per day with my electric company's web portal (Duke) over a two-week period. The meter was consistently 1% to 1.5% less than what Duke was showing. So, while the accuracy was off about 1%, the consistency was less than .5%. Installation was fairly simple. I made the mistake of closing up my breaker box before confirming the meter was properly connecting to the app via wifi. I had to go back into the breaker box and fix one of my connections providing power to the meter. Otherwise, it went smooth. I purchased some insulated electrician's gloves and made sure I was standing on a rubber mat since I don't have an external main breaker between my breaker box and my Duke electric meter. This meant that even though my breaker box main was turned off, the lines coming in were still hot. I wish there was a version of this meter with 24 or 32 ports. I had to choose the circuits to monitor, and so I have quite a few circuits that are not individually monitored. In the app, the circuits that are not monitored show up at the bottom as "Balance". In my case, the "Balance" is usually about 15% of my total usage. The app is easy to work with. I like that it will summarize data by hour, day, week, and month. Being able to see usage by week or month provides better averages for specific circuits. For example, if we run the clothes dryer several times on one day, but not at all on another day, the monthly average usage is going to provide realistic data. Overall, I am very satisfied with this purchase.
E**.
Excellent buy, easy to connect and wire.
Great price, works with Home Assistant, the android app worked just fine to setup and monitor the device. Installation did take a while mostly just trying to keep the plethora of wires all somewhat organized but was not difficult.
Trustpilot
Hace 1 mes
Hace 1 mes