Refoss
Refoss EM16P Smart Energy Monitor
$199.99
Best Home Energy Monitors · head-to-head
Refoss EM16P Smart Energy Monitor vs Shelly 3EM Smart 3-Phase Energy Meter
A sourced, side-by-side comparison. Shelly 3EM Smart 3-Phase Energy Meter is cheaper at $121.49. Every spec and price links to its source.
Shelly
Shelly 3EM Smart 3-Phase Energy Meter
$121.49Cheaper
Which is better: the Refoss EM16P Smart Energy Monitor or Shelly 3EM Smart 3-Phase Energy Meter?
On the specs we track, they're closely matched. The Shelly 3EM Smart 3-Phase Energy Meter is the cheaper at $121.49.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Refoss EM16P Smart Energy Monitor | Shelly 3EM Smart 3-Phase Energy Meter |
|---|---|---|
| US price | $199.99 | $121.49 |
| Brand | Refoss | Shelly |
| Released | — | — |
| Monitoring type | ct-clamp | ct-clamp |
| Main circuit amps | 200 | 120 |
| Branch circuit count | 16 | 0 |
| Connectivity protocol | Wi-Fi | Wi-Fi 802.11 b/g/n |
| Solar net metering | Yes | Yes |
| Local api support | Yes | Yes |
| Subscription required | No | No |
| App platforms | web UI (local), cloud optional | iOS, Android, web |
| Accuracy percent | 2 | — |
| Installation type | panel-mount | din-rail |
| Smart home integrations | Home Assistant (native), MQTT | Home Assistant, Alexa, Google Home, MQTT, CoAP, REST API |
| Etl ul certified | ETL (UL 61010) | — |
Sources — Refoss EM16P Smart Energy Monitor: refoss.net (verified 2026-06-27). Shelly 3EM Smart 3-Phase Energy Meter: us.shelly.com (verified 2026-06-27).
What's the difference between the Refoss EM16P Smart Energy Monitor and Shelly 3EM Smart 3-Phase Energy Meter?
Where the two actually differ on the specs we track (6 of 12). Matching specs are omitted.
- Main circuit amps: Refoss EM16P Smart Energy Monitor 200 vs Shelly 3EM Smart 3-Phase Energy Meter 120
- Branch circuit count: Refoss EM16P Smart Energy Monitor 16 vs Shelly 3EM Smart 3-Phase Energy Meter 0
- Connectivity protocol: Refoss EM16P Smart Energy Monitor Wi-Fi vs Shelly 3EM Smart 3-Phase Energy Meter Wi-Fi 802.11 b/g/n
- App platforms: Refoss EM16P Smart Energy Monitor web UI (local), cloud optional vs Shelly 3EM Smart 3-Phase Energy Meter iOS, Android, web
- Installation type: Refoss EM16P Smart Energy Monitor panel-mount vs Shelly 3EM Smart 3-Phase Energy Meter din-rail
- Smart home integrations: Refoss EM16P Smart Energy Monitor Home Assistant (native), MQTT vs Shelly 3EM Smart 3-Phase Energy Meter Home Assistant, Alexa, Google Home, MQTT, CoAP, REST API