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FoxESS DDSU666 Energy Meter Single-Phase 60 A RS485 Modbus
The FoxESS DDSU666 is a single-phase (1P2W) direct measurement energy meter up to 60 A, manufactured by CHINT for single-phase FoxESS inverters. It is installed on a 35 mm DIN rail in the electrical panel, downstream of the utility meter, and measures the energy flows to and from the grid bidirectionally.
Connected to the inverter through the RS485 port with Modbus protocol, it provides the power exchanged with the grid in real time: it is the component that enables the self-consumption monitoring, battery charge/discharge management and export limitation (zero export) functions. Accuracy class 1 guarantees an error within ±1% on current, power and energy.
Key features
Technical specifications
| Feature | Value |
|---|---|
| Product code | ZTY0.464.1264 |
| Model | DDSU666 (CHINT for FoxESS) |
| Phases | Single-phase 1P2W |
| Nominal current | 0–60 A |
| Measurement type | Direct, without current transformers |
| Accuracy class | Class 1 (±0.5% voltage, ±1% current/power/energy) |
| Operating voltage | 176–288 V c.a. |
| Communication | RS485, Modbus, 9600 baud |
| Mounting | 35 mm DIN rail |
| Dimensions | 88 × 70 × 65 mm |
| Body dimensions (FoxESS datasheet) | 36 × 85 × 66 mm |
| Weight | 0.2 kg |
Documentation
PDFDatasheet ZTY0.464.1264Official manufacturer documentInstallation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.