The Huawei DTSU666‑H Smart Power Sensor is a compact and accurate three-phase power meter designed for solar energy systems. It measures voltage, current, active/reactive power, frequency, and energy flow both forward and reverse. The device supports zero-export functionality by communicating with a Huawei inverter over RS‑485, automatically limiting excess power export to the grid. Featuring an easy-to-read LCD and simple DIN‑rail installation, this model handles currents up to 250 A, consumes less than 1 W itself, and operates reliably from −25 °C to +60 °C. It's ideal for residential and commercial solar setups aiming for self-consumption, energy monitoring, and export control.
Features of the Huawei DTSU666-H 250A/50mA Smart Power Sensor:
- Measures voltage, current, active/reactive power, frequency, and bidirectional energy
- Supports zero-export control for solar systems
- Built-in LCD display for local data viewing
- RS‑485 interface with Modbus RTU protocol
- Class‑1 measurement accuracy (±1% power, ±0.5% voltage)
- Ultra-low internal power consumption (≤ 1 W)
- Compact size for DIN‑rail mounting
Specifications of the Huawei DTSU666-H 250A/50mA Smart Power Sensor:
- Model: DTSU666‑H 250A / 50 mA
- Current Range: 0–250 A
- Voltage Range: 176–288 V (phase); 304–499 V (line)
- Accuracy: Voltage ±0.5%, Power/Energy ±1%, Frequency ±0.01 Hz
- Power Consumption: ≤ 1 W
- Dimensions: 100 × 72 × 65.5 mm
- Weight: ~1.5 kg (including cables)
- Installation: DIN35 rail mount
- Communication: RS‑485 (Modbus RTU), baud rate up to 9600 bps
- Operating Conditions: –25 °C to +60 °C; 5%–95% RH
Uses:
- Monitoring power output and energy usage in solar PV systems
- Enabling zero-export mode (blocking surplus solar power from flowing to the grid)
- Real-time data feedback to inverters or energy management systems
- Monitoring in homes, commercial buildings, or industrial installations
- Supporting compliant grid-tied solar installations requiring export limits
Benefits:
- Enables efficient energy self-consumption and avoids exporting surplus to the grid
- Real-time electrical data helps optimize solar system performance
- Low power usage ensures minimal additional load
- Compact DIN‑rail form factor simplifies installation
- Reliable under harsh environmental conditions
- Widely compatible with Huawei inverters and smart logging system
Package includes:
- 1x Huawei DTSU666-H 250A/50mA Smart Power Sensor
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