Device Comparison
Shelly 3EM vs Shelly 3EM-63T Gen3 vs Shelly Pro 3EM vs Shelly Pro 3EM 120A
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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 systems or three independent single-phase circuits
- Installation
- Compact breaker-adjacent panel installation with integrated pass-through apertures, mounted above or below DIN-rail breakers or similar breaker positions
- Measurement
- Three-phase or multi-circuit bidirectional energy meter with direct pass-through conductor measurement
- 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, split-phase, or 3-phase systems
- Installation
- DIN-rail mounted panel energy meter with three included 120A CT clamps
- Measurement
- Three-phase CT-based bidirectional energy meter with 4-quadrant measurement and photovoltaic-ready import/export monitoring
- Max current
- 120 A
| Install fit | ||||
|---|---|---|---|---|
| Phase support | Three-phase systems or three independent single-phase circuits | Three-phase systems or three independent single-phase circuits | Single-phase or three-phase installations | Single-phase, split-phase, or 3-phase systems |
| Installation | Breaker-box or electrical-panel mounted energy meter with three external CT clamps | Compact breaker-adjacent panel installation with integrated pass-through apertures, mounted above or below DIN-rail breakers or similar breaker positions | DIN-rail / panel-mounted with external current transformers | DIN-rail mounted panel energy meter with three included 120A CT clamps |
| Measurement | Three-channel CT-based bidirectional energy meter with contactor control | Three-phase or multi-circuit bidirectional energy meter with direct pass-through conductor measurement | Three-phase CT energy meter with bidirectional import/export measurement | Three-phase CT-based bidirectional energy meter with 4-quadrant measurement and photovoltaic-ready import/export monitoring |
| Max current | 120 A | 63 A | 120 A | 120 A |
| Meter fit | ||||
| Accuracy class | Unknown | Class B (IEC 62053-21) | Class B (active energy) | Class B (active energy) |
| Current sensing | 3 x 120A CTs included | Integrated 63A current transformers | 3 x 120A CTs included | 3 x 120A CTs included for phase measurement; optional neutral CT input supported |
| Monitoring | ||||
| Protocol | Wi-Fi / MQTT / CoAP / REST API | Wi-Fi / Bluetooth / MQTT / HTTP / WebSocket / JSON-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 cloud; can run locally over Wi-Fi with an embedded web interface plus local MQTT, HTTP, WebSocket, and RPC access. | Optional cloud; can run locally over Wi-Fi or Ethernet with local web interface, HTTP RPC, WebSocket, and MQTT. | Optional cloud; can run locally over LAN or Wi-Fi with an embedded web interface and local protocols including MQTT, HTTP, WebSocket, RPC, and Modbus TCP. |
| 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 | Global / region-dependent Shelly availability | 220-240 V single-phase and three-phase markets | USA / EU | US store / EU store / global Shelly reference |
| Source check | ||||
| Last verified | May 18, 2026 | May 18, 2026 | May 18, 2026 | May 18, 2026 |
| Product page | Official page | Official page | Official page | Official page |
| Documentation | Official docs | Official docs | Official docs | Official docs |