# Shelly 3EM Smart 3-Phase Energy Meter vs Generac PWRview Home Energy Monitor W2HEM: specs and price compared

A sourced, side-by-side comparison of the Shelly 3EM Smart 3-Phase Energy Meter (Shelly) and Generac PWRview Home Energy Monitor W2HEM (Generac) among home energy monitors. Shelly 3EM Smart 3-Phase Energy Meter is the cheaper of the two at $121.49.

## Side by side

| Spec | Shelly 3EM Smart 3-Phase Energy Meter | Generac PWRview Home Energy Monitor W2HEM |
| --- | --- | --- |
| US price | $121.49 | $219.99 |
| Brand | Shelly | Generac |
| Monitoring type | ct-clamp | ct-clamp |
| Main circuit amps | 120 | 264 |
| Branch circuit count | 0 | 0 |
| Connectivity protocol | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 b/g/n |
| Solar net metering | Yes | Yes |
| Local api support | Yes | — |
| Subscription required | No | — |
| App platforms | iOS, Android, web | iOS, Android |
| Accuracy percent | — | 1 |
| Installation type | din-rail | panel-mount |
| Smart home integrations | Home Assistant, Alexa, Google Home, MQTT, CoAP, REST API | — |
| Etl ul certified | — | UL/CSA 61010-1 |

## Key differences

- Main circuit amps: Shelly 3EM Smart 3-Phase Energy Meter 120 vs Generac PWRview Home Energy Monitor W2HEM 264
- App platforms: Shelly 3EM Smart 3-Phase Energy Meter iOS, Android, web vs Generac PWRview Home Energy Monitor W2HEM iOS, Android
- Installation type: Shelly 3EM Smart 3-Phase Energy Meter din-rail vs Generac PWRview Home Energy Monitor W2HEM panel-mount

## What reviewers say

**Generac PWRview Home Energy Monitor W2HEM** — Only one whitelisted tester, NYT Wirecutter, covers the Generac PWRview W2 (W2HEM), and only qualitatively: it was a former pick now dropped for poor availability and never lab-measured. Wirecutter says it uses machine learning like Sense and suits homes already in Generac's solar and battery ecosystem. No hands-on measurements exist. (1 sourced review.)

## Sources

- Shelly 3EM Smart 3-Phase Energy Meter: https://us.shelly.com/products/shelly-3em (us.shelly.com, verified 2026-06-27)
- Generac PWRview Home Energy Monitor W2HEM: https://norwall.com/products/pwrview-home-energy-monitor-W2HEM (norwall.com, verified 2026-06-27)

Canonical: https://frontdeskreview.com/gear/home-energy-monitors/shelly-3em-vs-generac-pwrview-w2hem/
Cite: Per The Front Desk Review, Shelly 3EM Smart 3-Phase Energy Meter ($121.49) vs Generac PWRview Home Energy Monitor W2HEM ($219.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/home-energy-monitors/shelly-3em-vs-generac-pwrview-w2hem/
License: CC BY 4.0.