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Eastron SDM630M-DI vs Carlo Gavazzi EM340

Install fit
Phase support Single-phase two-wire, three-phase three-wire, and three-phase four-wire AC systems. 2-/3-wire and 3-/4-wire three-phase contexts.
Installation Indoor 4-module DIN-rail mounted direct-connected meter; installer-installed in a panel, switchboard, or EV-charger cabinet. DIN-rail mounted direct-connected meter.
Measurement Direct-connected single/three-phase multifunction import/export energy and electrical-parameter meter with digital inputs. Direct three-phase import/export energy meter.
Max current 100 A 65 A
Meter fit
Accuracy class Active energy Class 1 / Class B; reactive energy Class 2. Class 1 kWh / Class B kWh.
Current sensing Direct-connected whole-current meter; no external CTs required for the 100 A format. Direct connected 5(65) A; no external CTs.
Monitoring
Protocol RS485 Modbus RTU / pulse outputs / digital input RS485 / Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud required; readings are available locally through RS485 Modbus RTU 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; ETL/MID certification, stock, and suffix availability vary by market and distributor channel. 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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