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Eastron SDM230-Modbus vs Eastron SDM120-M

Install fit
Phase support Single-phase 1P2W / 1P+N AC system. Single-phase two-wire 1P2W / 1P+N AC systems.
Installation Indoor 2-module 36 mm DIN-rail direct-connected single-phase energy meter. Indoor one-module DIN-rail mounted direct-connected single-phase meter.
Measurement Direct-connected single-phase bidirectional Modbus energy meter. Single-phase multifunction import/export energy and electrical-parameter meter.
Max current 100 A 45 A
Meter fit
Accuracy class Active energy Class 1.0 / Class B; reactive energy Class 2. Active energy Class 0.5/1; Class C/B.
Current sensing Direct connection up to 100 A; no external CTs for the SDM230-Modbus direct-fed variant. Direct-connected whole-current meter; no external CTs required.
Monitoring
Protocol RS485 Modbus RTU / DLT645 / pulse output RS485 Modbus RTU / DLT645 / 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 through Eastron and regional distributors; MID/ETL variant availability and local stock vary by market. Global Eastron product range; certification, stock, and model suffix availability vary by market.
Source check
Last verified Jul 3, 2026 Jun 25, 2026
Product page Official page Official page
Documentation Official docs Official docs
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