Shelly 3EM-63W Gen3
#7 in Whole-homeFull review
A budget three-phase meter for a small installation.
Amazon $114.99$114.99
The Shelly 3EM-63W Gen3 is the better home energy monitor overall, rated 3.1 to 2.0. The Shelly 3EM-63W Gen3 leads on value and circuits. The Shelly 3EM-63W Gen3 costs $210.01 less ($114.99 vs $325).
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.
Square D Wiser Energy Solar WISEREMPV
#18 in Whole-homeFull review
The solar edition of the Wiser Energy monitor, for homes with panels.
Amazon $325$325
Which should you buy?
- Choose the Shelly 3EM-63W Gen3 for value ($114.99 vs $325) 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 | Shelly 3EM-63W Gen3 | Square D Wiser Energy Solar WISEREMPV |
|---|---|---|
| Overall rating | 3.1/5 | 2.0/5 |
| Value 25% | 63 $114.99 | 4 $325 |
| 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% | 50 accuracy not claimed (neutral score used) | 50 accuracy not claimed (neutral score used) |
| 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 warranty not published, scored as none |
Specifications
| Shelly 3EM-63W Gen3 | Square D Wiser Energy Solar WISEREMPV | |
|---|---|---|
| Monitoring | ||
| Branch circuits included | None in box (up to 3) | None in box |
| Most circuits supported | 3 | - |
| Mains CT rating | - | 200 A |
| Electrical systems | 3-phase | Split-phase |
| Solar / net metering | Yes | Yes |
| Connectivity | ||
| Connection | Wi-Fi | Wi-Fi |
| Local API / MQTT / hub | - | No |
| Needs maker cloud | - | Yes |
| Build | ||
| Warranty | 3 years | - |