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Eastron SDM120CTM vs Eastron SDM72CT-M

Install fit
Phase support Single-phase 1P+N / 1P2W AC system. Three-phase four-wire 3P4W / 3 x 230(400) V AC system.
Installation Indoor 1-module DIN-rail CT-operated single-phase meter with external CT wiring. Indoor 4-module 35 mm DIN-rail mounted CT-operated three-phase meter for switchboards.
Measurement CT-operated single-phase multifunction energy meter with bidirectional energy and RS485 Modbus RTU. CT-operated three-phase 4-wire multifunction energy meter with RS485 Modbus RTU import/export energy measurement.
Max current 9999 A 9999 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. External current transformers; CT primary configurable 1-9999 A with 1 A or 5 A CT secondary input.
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 RS485 Modbus RTU and pulse outputs are available through compatible hardware.
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; distributor stock, CT package, and certification details vary by market.
Source check
Last verified Jun 28, 2026 Jun 27, 2026
Product page Official page Official page
Documentation Official docs Official docs
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