

CHINT DTSU666 Three-Phase Bidirectional Energy Meter — RS485 Modbus for Hybrid Inverters
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 DTSU666 is the three-phase version, the one half the inverter makers rebadge. It measures through external current transformers, so you pick the rating to suit the line, and it communicates over RS485 Modbus.
At a glance
Technical data
| Specification | Value |
|---|---|
| Product code | DTSU666 |
| Brand | CHINT |
| Phase | Three-Phase |
| Measurement | with external CTs |
| Direction | bidirectional, import and export |
| Communication | RS485 Modbus |
| Mounting | DIN rail |
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