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Eastron SDM120CTM vs Eastron SDM72D-M

Install fit
Phase support Single-phase 1P+N / 1P2W AC system. Three-phase four-wire 3P4W AC systems.
Installation Indoor 1-module DIN-rail CT-operated single-phase meter with external CT wiring. Indoor DIN-rail mounted direct-connected three-phase meter.
Measurement CT-operated single-phase multifunction energy meter with bidirectional energy and RS485 Modbus RTU. Three-phase 3P4W multifunction import/export energy and power meter.
Max current 9999 A 100 A
Meter fit
Accuracy class Active energy Class 1.0 / Class B; reactive energy Class 2. Active energy Class 1.0 / Class B; reactive energy Class 2.
Current sensing External CTs; CT primary 1-9999 A with 1 A or 5 A CT secondary input. Direct-connected whole-current meter; no external CTs required.
Monitoring
Protocol RS485 Modbus RTU / pulse output RS485 Modbus RTU / pulse output
Local API Yes Yes
Cloud dependency No vendor cloud required; readings are available locally through RS485 Modbus RTU and pulse outputs. No vendor cloud required; local readings are available through RS485 Modbus RTU and pulse outputs.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Availability Global Eastron product range; distributor stock, CT package, certification, and variant availability vary by market. Global Eastron product range; certification, stock, and suffix availability vary by market.
Source check
Last verified Jun 28, 2026 Jun 25, 2026
Product page Official page Official page
Documentation Official docs Official docs
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