Shelly Pro EM 50A
#10 in Whole-homeFull review
Good for monitoring and switching a pair of big loads such as an EV charger and a water heater.
Amazon $119.99$119.99
The Shelly Pro EM 50A is the better home energy monitor overall, rated 2.9 to 2.0. The Shelly Pro EM 50A leads on value. The Shelly Pro EM 50A costs $205.01 less ($119.99 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 Pro EM 50A for value ($119.99 vs $325).
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 EM 50A | Square D Wiser Energy Solar WISEREMPV |
|---|---|---|
| Overall rating | 2.9/5 | 2.0/5 |
| Value 25% | 61 $119.99 | 4 $325 |
| Circuits 20% | 6 0 branch circuits included, up to 2 | 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% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Shelly Pro EM 50A | Square D Wiser Energy Solar WISEREMPV | |
|---|---|---|
| Monitoring | ||
| Branch circuits included | None in box (up to 2) | None in box |
| Most circuits supported | 2 | - |
| Mains CT rating | 50 A | 200 A |
| Branch CT rating | 50 A | - |
| Electrical systems | - | Split-phase |
| Solar / net metering | Yes | Yes |
| Connectivity | ||
| Connection | Wi-Fi, LAN, Bluetooth | Wi-Fi |
| Local API / MQTT / hub | - | No |
| Needs maker cloud | - | Yes |