Huawei DTSU666-HW 3 phase 80A smart energy meter module

Huawei DTSU666-HW – 3-phase 80A smart power meter module

The Huawei DTSU666-HW is a three-phase, Class 1 accuracy Smart Power Sensor designed for use with Huawei hybrid invertersto measure real-time energy consumption. The module is installed in the distribution cabinet and transmits the measured values to the inverter via the Modbus-RTU protocol—this forms the basis for the zero-export function and efficient energy management.

Class 1 measurement accuracy

The DTSU666-HW measures voltage with ±0.5% accuracy, power and energy with ±1% accuracy, and frequency with ±0.01 Hz accuracy. The three-phase measurement (3P4W/3P3W) monitors all phases simultaneously, so the system knows exactly when and how much energy to withhold or feed into the grid. The measurement range is 0–80 A (an external CT is required above 80 A).

Easy installation and operation

The module can be mounted on a DIN35 rail, measures 100×72×80 mm, and has a power consumption of only 1.5W. The measured data is easy to read on the LCD display, and settings can also be configured there. It communicates via an RS485 interface using the Modbus-RTU protocol; the package includes a 10-meter RS485 cable. Installation temperature range: –25°C to +60°C.

Compatibility and System Integration

The DTSU666-HW is fully compatible with the Huawei FusionSolar ecosystem, including Huawei energy storage systems(LUNA2000). Based on the measured data, the inverter intelligently distributes energy: directing solar energy to storage, consumers, or the grid—always making the optimal decision.

Reliability and Warranty

The Huawei Smart Power Sensor is a symbol of industrial reliability: stable operation between –25°C and +60°C, and trouble-free operation even at relative humidity levels between 5% and 95%. It is one of the most widely used measuring devices among Huawei’s communication accessories, employed by numerous solar installers as a core component.

SOLARKIT Reviews

The Huawei DTSU666-HW is an indispensable meter for energy-efficient solar systems. Class 1 accuracy, simple DIN-rail installation, and seamless Huawei integration—all in a compact, reliable package. We recommend it to those who want to add precise power measurement and zero-export control to their Huawei inverters.