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Eastron SDM72D-M vs Eastron SDM72CT-M

Install fit
Phase support Single-phase two-wire (1P2W) and three-phase four-wire (3P4W); 100-277 V L-N or 100-480 V L-L, 50/60 Hz. 3P4W on current product page; V1.2 manual also documents 1P2W and 3P4W measurement.
Installation Indoor 72 mm / four-module DIN-rail direct connection; default top-in/bottom-out wiring. Indoor 4-module 35 mm DIN-rail CT-operated panel installation; 72 x 100 x 66 mm, IP51 and CAT III. Professional wiring and correctly rated CTs are required.
Measurement True-RMS 1P2W/3P4W voltage, current, power and bidirectional import/export energy measurement. CT-operated RMS electrical parameters plus bidirectional active/reactive import-export energy; pulse outputs and local RS485 Modbus RTU.
Max current 100 A 9999 A
Meter fit
Accuracy class Active energy Class 1.0 / Class B; reactive energy Class 2; MID certified. Active energy Class 1.0 / Class B; reactive energy Class 2.
Current sensing Direct-connected whole-current meter; no external CTs required. External CT inputs with configurable 1-9999 A primary and 1 A or 5 A secondary. The 9999 A value is the CT-primary programming ceiling, not direct current through the meter.
Monitoring
Protocol RS485 Modbus RTU / pulse output RS485 Modbus RTU / pulse output
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; 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; certification, stock, and suffix availability vary by market. Global Eastron product and inquiry channels; exact CT package, certification, stock and distributor availability vary by market.
Source check
Last verified Aug 26, 2026 Aug 28, 2026
Product page Official page Official page
Documentation Official docs Official docs
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