Aeotec Home Energy Meter Gen5
#2 in Whole-homeFull review
The older Aeotec Z-Wave mains meter, for hubs without Z-Wave Long Range; most buyers should take the cheaper Home Energy Meter 8.
Amazon $115.99$115.99
The Aeotec Home Energy Meter Gen5 is the better home energy monitor overall, rated 3.4 to 3.4. The Aeotec Home Energy Meter Gen5 leads on value. The Shelly Pro 3EM 120A wins on warranty and circuits. The Aeotec Home Energy Meter Gen5 costs $37.34 less ($115.99 vs $153.33).
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.
Shelly Pro 3EM 120A
#3 in Whole-homeFull review
The first-generation Pro 3EM with a longer warranty; buy the v2 if you want Matter.
Amazon $153.33$153.33
Which should you buy?
- Choose the Aeotec Home Energy Meter Gen5 for value ($115.99 vs $153.33).
- Choose the Shelly Pro 3EM 120A for warranty (5-year warranty vs 1-year warranty) and circuits (0 branch circuits included, up to 3 vs mains only).
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 | Aeotec Home Energy Meter Gen5 | Shelly Pro 3EM 120A |
|---|---|---|
| Overall rating | 3.4/5 | 3.4/5 |
| Value 25% | 63 $115.99 | 47 $153.33 |
| Circuits 20% | 0 mains only | 9 0 branch circuits included, up to 3 |
| Local control 20% | 100 local API, MQTT or hub, Home Assistant, works without the cloud | 50 local control not published (neutral score used) |
| Accuracy 15% | 100 claimed within ±1% | 100 claimed within ±1% |
| Subscription 10% | 50 subscription terms not published (neutral score used) | 50 subscription terms not published (neutral score used) |
| Warranty 10% | 0 1-year warranty | 100 5-year warranty |
Specifications
| Aeotec Home Energy Meter Gen5 | Shelly Pro 3EM 120A | |
|---|---|---|
| Monitoring | ||
| Branch circuits included | None in box | None in box (up to 3) |
| Most circuits supported | - | 3 |
| Mains CT rating | 200 A | 120 A |
| Electrical systems | Split-phase | 3-phase |
| Solar / net metering | - | Yes |
| Claimed accuracy | ±1% | ±1% |
| Connectivity | ||
| Connection | Z-Wave Plus | Wi-Fi, LAN, Bluetooth |
| Local API / MQTT / hub | Yes | - |
| Home Assistant | Yes | - |
| Needs maker cloud | No | - |
| Build | ||
| Warranty | 1 year | 5 years |