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
16Local + Home Assistant±1%
3.9/5
Choose the 16-sensor kit instead unless it is out of stock; the saving here is small.
- 8 (expands to 16)Circuits
- Local + Home AssistantControl
- ±1%Accuracy
- 1 yearWarranty
Check price at Amazon$129.99
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Eight circuits plus room to add eight more
- MQTT privacy mode
Cons
- Only $10 less than the 16-sensor kit
- Little-known brand; one-year warranty
The Fusion Energy SEM-Meter family
Every Fusion Energy SEM-Meter model we rank, smallest first. Ratings compare each against its own type.
| Model | Circuits | Rating | Price |
|---|---|---|---|
| Fusion Energy SEM-Meter (8 sensors) (this one) | 8 (expands to 16) | 3.9/5 | $129.99 |
| Fusion Energy SEM-Meter (16 sensors) | 16 | 4.1/5 | $139.99 |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | SEM-Meter |
|---|---|
| Monitoring | |
| Branch circuits included | 8 (expands to 16) |
| Most circuits supported | 16 |
| Branch CT rating | 50 A |
| Electrical systems | Split-phase, 3-phase |
| Solar / net metering | Yes |
| Claimed accuracy | ±1% |
| Connectivity | |
| Connection | 2.4 GHz Wi-Fi |
| Local API / MQTT / hub | Yes |
| Home Assistant | Yes |
| Needs maker cloud | No |
| Build | |
| Warranty | 1 year |
Alternatives in this type
Fusion Energy SEM-Meter (16 sensors)
#3 in Circuit-levelFull review
The lowest price for 16 circuits and local MQTT, if you accept a lesser-known maker.
Amazon $139.99$139.99
16Local + Home Assistant±1%
Emporia Vue 3 Commercial 3-Phase
#5 in Circuit-levelFull review
For a small shop or workshop on 3-phase power; a homeowner on split-phase should buy the standard Vue 3.
Amazon $209.99$209.99
16
Compare
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