Fusion Energy SEM-Meter (8 sensors)
#4 in Circuit-levelFull review
Choose the 16-sensor kit instead unless it is out of stock; the saving here is small.
Amazon $129.99$129.99
The Fusion Energy SEM-Meter (8 sensors) is the better home energy monitor overall, rated 3.9 to 2.9. The Fusion Energy SEM-Meter (8 sensors) leads on local control, accuracy and value. The Fusion Energy SEM-Meter (8 sensors) costs $20 less ($129.99 vs $149.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Emporia Vue 3 (8 sensors)
#8 in Circuit-levelFull review
A cheaper start for the same Vue 3 brain, if you only care about the big appliances.
Amazon $149.99$149.99
Which should you buy?
- Choose the Fusion Energy SEM-Meter (8 sensors) for local control (local API, MQTT or hub, Home Assistant, works without the cloud vs cloud app only), accuracy (claimed within ±1% vs claimed within ±2%) and value ($129.99 vs $149.99).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every circuit-level home energy monitor; a clear win is highlighted. How we rank explains each one.
| Factor weight | Fusion Energy SEM-Meter (8 sensors) | Emporia Vue 3 (8 sensors) |
|---|---|---|
| Overall rating | 3.9/5 | 2.9/5 |
| Value 25% | 56 $129.99 | 48 $149.99 |
| Circuits 20% | 75 8 branch circuits included, up to 16 | 75 8 branch circuits included, up to 16 |
| Local control 20% | 100 local API, MQTT or hub, Home Assistant, works without the cloud | 0 cloud app only |
| Accuracy 15% | 100 claimed within ±1% | 50 claimed within ±2% |
| Subscription 10% | 50 subscription terms not published (neutral score used) | 50 subscription terms not published (neutral score used) |
| Warranty 10% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Fusion Energy SEM-Meter (8 sensors) | Emporia Vue 3 (8 sensors) | |
|---|---|---|
| Monitoring | ||
| Branch circuits included | 8 (expands to 16) | 8 (expands to 16) |
| Most circuits supported | 16 | 16 |
| Mains CT rating | - | 200 A |
| Branch CT rating | 50 A | 50 A |
| Electrical systems | Split-phase, 3-phase | Split-phase, 3-phase |
| Solar / net metering | Yes | Yes |
| Claimed accuracy | ±1% | ±2% |
| Connectivity | ||
| Connection | 2.4 GHz Wi-Fi | 2.4 GHz Wi-Fi |
| Local API / MQTT / hub | Yes | No |
| Home Assistant | Yes | - |
| Needs maker cloud | No | Yes |
| Build | ||
| Warranty | 1 year | 1 year |