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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