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Eastron SDM230-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 DIN-rail mounted direct-connected meter; installer-installed in a switchboard or electrical cabinet. DIN-rail mounted direct-connected meter.
Measurement Single-phase multifunction direct-connected energy meter for import/export energy, power, voltage, current, power factor, frequency, and demand monitoring. Direct three-phase import/export energy meter.
Max current 100 A 65 A
Meter fit
Accuracy class Class 0.5 IEC 62053-22 / Class C EN 50470-3:2022. Class 1 kWh / Class B kWh.
Current sensing Direct-connected meter; no external CTs required. Direct connected 5(65) A; no external CTs.
Monitoring
Protocol RS485 Modbus / DLT645 / pulse output RS485 / Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud is required; readings are available locally through RS485 Modbus/DLT645 and pulse outputs when connected to compatible equipment. 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 through Eastron factory/contact route and regional distributors; exact 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 24, 2026 Jun 23, 2026
Product page Official page Official page
Documentation Official docs Official docs
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