

Eastron SDM230M Single-Phase Energy Meter — RS485 Modbus, Deye and Solis Compatible
A hybrid inverter without a meter works blind: it does not know how much the house is drawing, so it cannot tell how much energy to keep and how much to export. A bidirectional meter is what makes real self-consumption possible, and on new installations it is also what keeps export within the limit.
The SDM230 connects directly on the line up to 100A, with no current transformers: two wires in, two out, and the meter is done. Class 1 on active energy, reading up to 999,999.9kWh, RS485 Modbus RTU with addresses 1 to 247 and up to 64 devices on one bus, which can run 1,000 metres.
At a glance
Technical data
| Specification | Value |
|---|---|
| Product code | SDM230M |
| Phase and voltage | single-phase, 230V (80–120% Un range) |
| Measurement | direct connection up to 100A |
| Accuracy class | class 1 active energy, class 2 reactive |
| Direction | bidirectional, import and export |
| Communication | RS485 Modbus RTU, addresses 1–247, up to 64 devices, bus up to 1,000 m |
| Pulse output | 1000 imp/kWh |
| Operating temperature | −25 … +55 °C |
| Protection rating | IP51, indoor use |
| Standards | IEC 62053-21, EN 50470-1/3 |
| Mounting | DIN rail |
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