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Eastron SDM630MCT V2 vs Carlo Gavazzi EM340
| Install fit | ||
|---|---|---|
| Phase support | Three-phase four-wire, three-phase three-wire, and single-phase two-wire AC systems. | 2-/3-wire and 3-/4-wire three-phase contexts. |
| Installation | Indoor 4-module DIN-rail mounted CT-operated meter; installer-installed with auxiliary power and external 1A/5A CTs. | DIN-rail mounted direct-connected meter. |
| Measurement | CT-operated three-phase multifunction import/export energy and electrical-parameter meter for 3P4W, 3P3W, and 1P2W systems. | Direct three-phase import/export energy meter. |
| Max current | 9999 A | 65 A |
| Meter fit | ||
| Accuracy class | Active energy Class 0.5S/1.0; Class B/C. | Class 1 kWh / Class B kWh. |
| Current sensing | CT/PT operated meter with 1A/5A CT secondary inputs and configurable CT primary ratio from 1 A to 9999 A. | Direct connected 5(65) A; no external CTs. |
| Monitoring | ||
| Protocol | RS485 Modbus RTU / pulse outputs / optional M-Bus or LoRaWAN variants | RS485 / Modbus RTU |
| Local API | Yes | Yes |
| Cloud dependency | No vendor cloud required; local readings are available through RS485 Modbus RTU and pulse outputs on the SDM630MCT/MT variants. | No vendor cloud required; RS485 Modbus RTU is local wired access. |
| Home Assistant | Yes | Yes |
| Solar fit | ||
| Solar import/export | Yes | Yes |
| Buying context | ||
| Availability | Global Eastron product range; certification, stock, CT configuration, and communication variant availability vary by market. | Global / localized Carlo Gavazzi product channels; stock and certification vary by market. |
| Source check | ||
| Last verified | Jun 25, 2026 | Jun 23, 2026 |
| Product page | Official page | Official page |
| Documentation | Official docs | Official docs |
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