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
The Shelly Pro 3EM 120A is the better home energy monitor overall, rated 3.4 to 2.5. The Shelly Pro 3EM 120A leads on circuits. The Eyedro Home costs $3.44 less ($149.89 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.
Eyedro Home
#11 in Whole-homeFull review
A simple two-sensor monitor for the service mains, made in North America.
Amazon $149.89$149.89
Which should you buy?
- Choose the Shelly Pro 3EM 120A for 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 | Shelly Pro 3EM 120A | Eyedro Home |
|---|---|---|
| Overall rating | 3.4/5 | 2.5/5 |
| Value 25% | 47 $153.33 | 48 $149.89 |
| Circuits 20% | 9 0 branch circuits included, up to 3 | 0 mains only |
| Local control 20% | 50 local control not published (neutral score used) | 0 cloud app only |
| Accuracy 15% | 100 claimed within ±1% | 50 accuracy not claimed (neutral score used) |
| Subscription 10% | 50 subscription terms not published (neutral score used) | 100 no subscription |
| Warranty 10% | 100 5-year warranty | 0 warranty not published, scored as none |
Specifications
| Shelly Pro 3EM 120A | Eyedro Home | |
|---|---|---|
| Monitoring | ||
| Branch circuits included | None in box (up to 3) | None in box |
| Most circuits supported | 3 | - |
| Mains CT rating | 120 A | 200 A |
| Electrical systems | 3-phase | - |
| Solar / net metering | Yes | Yes |
| Claimed accuracy | ±1% | - |
| Connectivity | ||
| Connection | Wi-Fi, LAN, Bluetooth | 2.4 GHz Wi-Fi and Ethernet |
| Local API / MQTT / hub | - | No |
| Needs maker cloud | - | Yes |
| Free of subscription | - | Yes |
| Build | ||
| Warranty | 5 years | - |