Refoss EM16P
#2 in Circuit-levelFull review
The pick for Home Assistant users who want circuit data without a cloud account.
Amazon $199.99$199.99
The Refoss EM16P is the better home energy monitor overall, rated 4.1 to 3.9. The Refoss EM16P leads on circuits and warranty. The Fusion Energy SEM-Meter (8 sensors) wins on value. The Fusion Energy SEM-Meter (8 sensors) costs $70 less ($129.99 vs $199.99).
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.
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
Which should you buy?
- Choose the Refoss EM16P for circuits (16 branch circuits vs 8 branch circuits included, up to 16) and warranty (2-year warranty vs 1-year warranty).
- Choose the Fusion Energy SEM-Meter (8 sensors) for value ($129.99 vs $199.99).
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 | Refoss EM16P | Fusion Energy SEM-Meter (8 sensors) |
|---|---|---|
| Overall rating | 4.1/5 | 3.9/5 |
| Value 25% | 32 $199.99 | 56 $129.99 |
| Circuits 20% | 100 16 branch circuits | 75 8 branch circuits included, up to 16 |
| Local control 20% | 100 local API, MQTT or hub, Home Assistant, works without the cloud | 100 local API, MQTT or hub, Home Assistant, works without the cloud |
| Accuracy 15% | 100 claimed within ±1% | 100 claimed within ±1% |
| Subscription 10% | 100 no subscription | 50 subscription terms not published (neutral score used) |
| Warranty 10% | 25 2-year warranty | 0 1-year warranty |
Specifications
| Refoss EM16P | Fusion Energy SEM-Meter (8 sensors) | |
|---|---|---|
| Monitoring | ||
| Branch circuits included | 16 | 8 (expands to 16) |
| Most circuits supported | 16 | 16 |
| Mains CT rating | 200 A | - |
| Branch CT rating | 60 A | 50 A |
| Electrical systems | Split-phase, 3-phase | Split-phase, 3-phase |
| Solar / net metering | Yes | Yes |
| Claimed accuracy | ±1% | ±1% |
| Connectivity | ||
| Connection | Wi-Fi | 2.4 GHz Wi-Fi |
| Local API / MQTT / hub | Yes | Yes |
| Home Assistant | Yes | Yes |
| Needs maker cloud | No | No |
| Free of subscription | Yes | - |
| Build | ||
| Warranty | 2 years | 1 year |