Device Overview
The Eastron SDM630MCT V2 is a CT-operated DIN-rail multifunction energy meter for installations where a direct-connected 100 A meter is not the right fit. It is aimed at three-phase EV charging metering, solar import/export metering, commercial sub-metering, and larger electrical services that need external current transformers.
This page is scoped as an energy meter. It is not a solar inverter, battery-storage product, EV charger, or standalone gateway. Its value is in measuring and communicating electrical data through wired metering interfaces.
Core Characteristics
The SDM630MCT V2 works with 3P4W, 3P3W, and 1P2W AC systems. Eastron's product page describes it as a CT and PT operated, four-module DIN-rail meter with multi-parameter measurement including kWh, kvarh, W, var, VA, power factor, frequency, demand, and voltage.
For comparison and filtering, the important distinction is the CT input architecture. The meter accepts 1 A or 5 A CT secondary inputs, and Eastron documents CT primary configuration from 1 A to 9999 A. That does not mean the meter directly carries 9999 A; it means the installed CTs and configured ratio determine the measured service range.
Installation And Measurement
This is an installer-installed DIN-rail device. The reviewed Eastron sources describe auxiliary power requirements, external CT use, and RMS measurement on three-phase AC systems. It should be planned like a panel metering component rather than a plug-in monitor or app-first consumer sensor.
The measurement type is best understood as CT-operated multifunction import/export energy and power monitoring. Bidirectional measurement matters for solar, EV charging, and sub-metering because it helps distinguish imported and exported energy instead of only counting one-way consumption.
Accuracy And Current Sensors
Eastron's SDM630MCT V2 page lists active energy accuracy context including Class 0.5S IEC 62053-22, Class 1.0 IEC 62053-21, and Class B/C EN50470-3:2022, plus Class 2 reactive energy. The stored accuracy field is intentionally compact so it remains usable in comparison tables while the source note preserves the fuller standards context.
Because this is a CT-operated meter, accuracy in the field also depends on selecting the correct CTs, installing them in the right orientation, and configuring the CT ratio correctly. That is why this device is a better fit for installer-led metering jobs than quick DIY monitoring.
Communication And Integration
The SDM630MCT / MT output set includes pulse outputs and RS485 Modbus RTU. That makes the device suitable for local metering integrations through compatible Modbus gateways, data loggers, energy-management systems, or building-management platforms.
Home Assistant support is treated as standards-based Modbus integration through suitable RS485 equipment, not as an Eastron-native cloud integration. No vendor cloud is required for the core local metering path.
Best Fit
Choose this device when the project needs a CT-operated three-phase meter with Modbus, bidirectional energy measurement, and a high configurable CT primary range. It is especially relevant for EV charging metering, solar import/export measurement, commercial panels, and higher-current services where a direct-connected meter would be inappropriate.
Do not choose it if the buyer wants a simple app-first home monitor, native Wi-Fi cloud dashboards, or a product that includes current clamps and a consumer setup flow out of the box. In those cases, a packaged smart home energy monitor may be easier to install and maintain.