Huawei DTSU666-FE 3 phase 100A smart energy meter module for EV

Huawei DTSU666-FE – 3-phase 100A smart meter module for EV chargers

The Huawei DTSU666-FE is a three-phase, Class 1 accuracy smart meter module designed primarily for use with electric vehicle chargers. Its task is to monitor grid energy flow in real time and ensure intelligent charging control—preventing grid overload and optimizing solar energy usage.

Why is a meter needed with an EV charger?

Charging an electric vehicle places a high and fluctuating load on the grid. The DTSU666-FE continuously measures the household’s total energy consumption and provides real-time data to the charger. Thanks to this, the system dynamically regulates charging power: if the solar panels generate enough energy, the charger speeds up; if grid capacity is limited, it automatically slows down.

Accuracy and Communication

The DTSU666-FE operates with Class 1 measurement accuracy: voltage ±0.5%, current and energy ±1%, frequency ±0.01 Hz. It communicates via an RS485 interface (Modbus-RTU) and a Fast Ethernet (FE) connection and can be mounted on a DIN35 rail. It can be used in both single-phase and three-phase (3P4W/3P3W) networks, with a measurement range of 0–100 A (using 3 x 100 A / 40 mA CTs).

Durability and Operation

The DTSU666-FE operates from –25°C to +60°C, with a storage temperature range down to –40°C. All parameters can be easily read and adjusted on the LCD display. When combined withHuawei energy storage systems, self-consumption of solar energy can be maximized, particularly in EV charging scenarios.

SOLARKIT Reviews

The Huawei DTSU666-FE is one of the most reliable measurement modules for EV charging solar systems: Class 1 accuracy, compact DIN-rail design, and seamless Huawei integration. We recommend it for those who combine their electric vehicle chargerwith a solar system and want smart charging control.