Shelly EM Gen3
#5 in Whole-homeFull review
An inexpensive meter for a single circuit you care about, such as a sub-panel or heat pump.
Amazon $69.99$69.99
The Shelly EM Gen3 is the better home energy monitor overall, rated 3.2 to 2.9. The Shelly EM Gen3 leads on local control, value and warranty. The Emporia Vue 3 (no branch sensors) wins on circuits. The Shelly EM Gen3 costs $30 less ($69.99 vs $99.99).
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 (no branch sensors)
#9 in Whole-homeFull review
The cheapest way into Emporia: whole-home numbers now, circuit sensors as you need them.
Amazon $99.99$99.99
Which should you buy?
- Choose the Shelly EM Gen3 for local control (Home Assistant vs cloud app only), value ($69.99 vs $99.99) and warranty (3-year warranty vs 1-year warranty).
- Choose the Emporia Vue 3 (no branch sensors) for circuits (0 branch circuits included, up to 16 vs 0 branch circuits included, up to 2).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every whole-home home energy monitor; a clear win is highlighted. How we rank explains each one.
| Factor weight | Shelly EM Gen3 | Emporia Vue 3 (no branch sensors) |
|---|---|---|
| Overall rating | 3.2/5 | 2.9/5 |
| Value 25% | 91 $69.99 | 71 $99.99 |
| Circuits 20% | 6 0 branch circuits included, up to 2 | 50 0 branch circuits included, up to 16 |
| Local control 20% | 30 Home Assistant | 0 cloud app only |
| Accuracy 15% | 50 accuracy not claimed (neutral score used) | 50 claimed within ±2% |
| Subscription 10% | 50 subscription terms not published (neutral score used) | 50 subscription terms not published (neutral score used) |
| Warranty 10% | 50 3-year warranty | 0 1-year warranty |
Specifications
| Shelly EM Gen3 | Emporia Vue 3 (no branch sensors) | |
|---|---|---|
| Monitoring | ||
| Branch circuits included | None in box (up to 2) | None in box (up to 16) |
| Most circuits supported | 2 | 16 |
| Mains CT rating | - | 200 A |
| Branch CT rating | 50 A | - |
| Electrical systems | - | Split-phase, 3-phase |
| Solar / net metering | - | Yes |
| Claimed accuracy | - | ±2% |
| Connectivity | ||
| Connection | Wi-Fi | 2.4 GHz Wi-Fi |
| Local API / MQTT / hub | - | No |
| Home Assistant | Yes | - |
| Needs maker cloud | - | Yes |
| Build | ||
| Warranty | 3 years | 1 year |