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Eastron SDM120-M vs Carlo Gavazzi EM340

Install fit
Phase support Single-phase two-wire 1P2W / 1P+N AC systems. 2-/3-wire and 3-/4-wire three-phase contexts.
Installation Indoor one-module DIN-rail mounted direct-connected single-phase meter. DIN-rail mounted direct-connected meter.
Measurement Single-phase multifunction import/export energy and electrical-parameter meter. Direct three-phase import/export energy meter.
Max current 45 A 65 A
Meter fit
Accuracy class Active energy Class 0.5/1; Class C/B. Class 1 kWh / Class B kWh.
Current sensing Direct-connected whole-current meter; no external CTs required. Direct connected 5(65) A; no external CTs.
Monitoring
Protocol RS485 Modbus RTU / DLT645 / pulse output RS485 / Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud required; local readings are available through RS485 Modbus RTU and pulse outputs. 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, and model suffix 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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