Device Overview
Eastron SDM230-M is a single-phase DIN-rail multifunction energy meter for direct-connected 1P2W / 1P+N circuits. It fits installer-led solar, sub-metering, EV charging cabinet, and small panel jobs where a 100 A direct-connected meter is appropriate.
Core Characteristics
The official SDM230-M page lists multi-measurement support for kWh, kVarh, W, Var, VA, voltage, current, power factor, frequency, and maximum demand. It also documents bidirectional measurement, 100 A maximum direct load, two-module 36 mm DIN-rail format, MID approval, and single-phase 1P2W use.
The comparison accuracy field uses the current SDM230-M page: active energy Class 0.5 under IEC 62053-22 and Class C under EN 50470-3:2022. The same official page lists voltage/current accuracy of +/-0.5% and active/reactive/apparent power accuracy of +/-1%.
Installation And Measurement Fit
SDM230-M is direct connected, so it does not use split-core CT clamps. That keeps the meter compact and precise for suitable circuits, but it is less flexible than CT-based monitors for larger services or retrofit jobs where conductors should not be opened.
Communications And Integrations
The meter provides RS485 Modbus/DLT645 and pulse outputs. EnergyMeterHub treats local API support as true because the meter exposes local wired register-style data through compatible equipment. Home Assistant support is standards-based through Modbus, not an Eastron-native integration.
Solar And Export Monitoring
Official Eastron sources describe bidirectional measurement and solar PV use cases, so this page marks solar import/export support as true. The inverter, gateway, or controller still needs correct wiring and register mapping for import and export values.
Buying Notes
Eastron presents the SDM230-M through an official product/contact route rather than a direct checkout price. Buyers should confirm the exact suffix, certification set, Modbus/DLT645 variant, and local distributor availability before specifying it.