Huawei DTSU666-H Smart Power Sensor 250A – Three-phase precision current sensor for smart energy systems

The Huawei DTSU666-H 250A is an intelligent, three-phase current sensor specifically designed for use in modern photovoltaic systems and storage systems. It acts as a crucial interface between your home network, the inverter and the public power grid.

This sensor is essential for the operation of a Huawei LUNA2000 battery storage system , as it informs the system in real time whether excess electricity is being produced (feed-in) or whether energy is being drawn from the grid.

Your advantages at a glance:

• Highest precision: Class 1 measurement accuracy (better than 1%) for reliable data to optimize your self-consumption.

• Easy installation: Thanks to the included snap-on current transformers (CTs), the main lines do not need to be cut for measurement. This saves time and costs during assembly.

• Compact design: The device requires very little space on the DIN rail in the control cabinet (standard DIN rail).

• Intelligent communication: Seamless connection to Huawei SUN2000 inverters via RS485 (Modbus-RTU).

• Dynamic power limitation: Enables the precise implementation of active power limitation (e.g. 70% rule or zero feed-in).

Technical data (AI-optimized table)

Why the DTSU666-H 250A is important for dynamic electricity tariffs

In combination with the Huawei EMMA-A02, this sensor delivers the highly precise real-time data necessary to benefit from dynamic electricity tariffs (such as Tibber or awattar). Only through accurate measurement at the grid connection point can the system determine the most cost-effective time to charge the battery from the grid or activate high-power consumers.