Device Comparison
Shelly 3EM vs Shelly 3EM-63T Gen3 vs Shelly Pro 3EM vs Shelly Pro 3EM 120A
Compare 4 energy meter options by installation fit, monitoring, local data access, source-checked specs, and buying context.
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Which To Choose
Start with the practical fit, then read the table.
Shelly 3EM
Best fit when three-phase systems or three independent single-phase circuits, solar import/export visibility, and local dashboards and Home Assistant.
Shelly 3EM-63T Gen3
Best fit when three-phase or three independent single-phase circuits, solar import/export visibility, and local dashboards and Home Assistant.
Shelly Pro 3EM
Best fit when single-phase or three-phase installations, solar import/export visibility, and local dashboards and Home Assistant.
Shelly Pro 3EM 120A
Best fit when single-phase or three-phase AC measurement., solar import/export visibility, and local dashboards and Home Assistant.
Use this comparison when you are choosing between energy meter options and need to separate practical setup fit from headline specifications.
At A Glance
Key fit signals before the full table
A quick pass over the most decision-shaping details for each device in this featured comparison.
Shelly 3EM
- Phase
- Three-phase systems or three independent single-phase circuits
- Installation
- Breaker-box or electrical-panel mounted energy meter with three external CT clamps
- Measurement
- Three-channel CT-based bidirectional energy meter with contactor control
- Max current
- 120 A
Shelly 3EM-63T Gen3
- Phase
- Three-phase or three independent single-phase circuits
- Installation
- Indoor meter mounted above or under DIN-rail mounted circuit breakers
- Measurement
- Three-channel four-quadrant smart energy meter for energy, voltage, current, active power, apparent power, and solar import/export monitoring
- Max current
- 63 A
Shelly Pro 3EM
- Phase
- Single-phase or three-phase installations
- Installation
- DIN-rail / panel-mounted with external current transformers
- Measurement
- Three-phase CT energy meter with bidirectional import/export measurement
- Max current
- 120 A
Shelly Pro 3EM 120A
- Phase
- Single-phase or three-phase AC measurement.
- Installation
- DIN-rail mounted meter with external 120 A current transformers.
- Measurement
- CT-based single-/three-phase energy meter with 4-quadrant import/export measurement.
- Max current
- 120 A
Before You Decide
Checks that matter before price.
- Confirm your supply type first: single-phase, split-phase, or three-phase.
- Decide whether DIN-rail wiring, CT clamps, or utility-meter access fits your switchboard.
- Choose between cloud convenience and local data access before comparing prices.
- For solar homes, make sure import, export, and load readings are measured at the right point.
| Install fit | ||||
|---|---|---|---|---|
| Phase support | Three-phase systems or three independent single-phase circuits | Three-phase or three independent single-phase circuits | Single-phase or three-phase installations | Single-phase or three-phase AC measurement. |
| Installation | Breaker-box or electrical-panel mounted energy meter with three external CT clamps | Indoor meter mounted above or under DIN-rail mounted circuit breakers | DIN-rail / panel-mounted with external current transformers | DIN-rail mounted meter with external 120 A current transformers. |
| Measurement | Three-channel CT-based bidirectional energy meter with contactor control | Three-channel four-quadrant smart energy meter for energy, voltage, current, active power, apparent power, and solar import/export monitoring | Three-phase CT energy meter with bidirectional import/export measurement | CT-based single-/three-phase energy meter with 4-quadrant import/export measurement. |
| Max current | 120 A | 63 A | 120 A | 120 A |
| Meter fit | ||||
| Accuracy class | Unknown | Class B active energy | Class B (active energy) | Class B active energy / 1% measurement accuracy |
| Current sensing | 3 x 120A CTs included | Integrated non-contact 63 A current measurement through the Shelly 3EM-63T flat-terminal body | 3 x 120A CTs included | 3 x 120 A current transformers for single- or three-phase measurement. |
| Monitoring | ||||
| Protocol | Wi-Fi / MQTT / CoAP / REST API | Wi-Fi / Bluetooth / MQTT / HTTP / WebSocket / RPC | Wi-Fi / Ethernet / Bluetooth / HTTP RPC / WebSocket / MQTT / Modbus | LAN / Wi-Fi / Bluetooth / MQTT / HTTP / WebSocket / TLS |
| Local API | Yes | Yes | Yes | Yes |
| Cloud dependency | Optional cloud; can run locally over Wi-Fi with an embedded web interface and local protocols including MQTT, CoAP, and REST API. | Optional Shelly Cloud; local Wi-Fi web interface and MQTT/HTTP/WebSocket/RPC paths are available without cloud. | Optional cloud; local LAN/Wi-Fi use is supported through web UI, MQTT, HTTP/RPC, WebSocket, Modbus, scripting, and JSON/CSV export. | Optional Shelly Cloud; local LAN operation is available through embedded web interface, Modbus TCP, MQTT, HTTP/RPC, WebSocket, scripting, and webhooks. |
| Home Assistant | Yes | Yes | Yes | Yes |
| Solar fit | ||||
| Solar import/export | Yes | Yes | Yes | Yes |
| Buying context | ||||
| Price range | About USD 121.49 | About USD 115 | Unknown | About USD 154.99 |
| Availability | Discontinued official Shelly 3EM product; historical Shelly USA page remains visible, but new availability is limited to remaining regional distributor or resale stock where still offered. | United States via Shelly USA official store; regional Shelly availability varies by market | USA / EU | United States / Europe / regional Shelly official stores and distributors; exact 120A bundle availability varies by market. |
| Source check | ||||
| Last verified | Jun 5, 2026 | Jul 7, 2026 | Jun 11, 2026 | Jun 18, 2026 |
| Product page | Official page | Official page | Official page | Official page |
| Documentation | Official docs | Official docs | Official docs | Official docs |
Verdict
Start with Shelly 3EM when three-phase systems or three independent single-phase circuits, solar import/export visibility, and local dashboards and Home Assistant. Put Shelly 3EM-63T Gen3 higher on the list when three-phase or three independent single-phase circuits, solar import/export visibility, and local dashboards and Home Assistant. For the final choice, check the full table for installation constraints, local data access, and source-verified unknowns.
FAQ
Common decision questions.
Which energy meter should I choose?
Choose the option that matches your installation constraints and data path first. For 4 energy meter options, the full table is most useful after you know whether local data access, cloud convenience, backup behavior, solar visibility, or expansion matters most.
What should I check before comparing prices?
Check installation fit, required accessories, official documentation, monitoring platform support, and any unknown fields in the source-checked table. Price is only useful once those constraints are clear.
Can these devices work with local dashboards or Home Assistant?
Shelly 3EM, Shelly 3EM-63T Gen3, Shelly Pro 3EM, Shelly Pro 3EM 120A list Home Assistant support in the catalog. Shelly 3EM, Shelly 3EM-63T Gen3, Shelly Pro 3EM, Shelly Pro 3EM 120A are marked with local API support. Confirm firmware, region, and integration maturity before treating this as a final compatibility guarantee.
Are unknown fields a reason to avoid a device?
Not always. Unknown means the field was not confirmed from the reviewed source data. Treat it as a question for the installer, reseller, or manufacturer before making a purchase decision.