Huawei DTSU666-H Three-Phase 250A Smart Meter

Huawei DTSU666-H – Three-Phase Smart Meter 250A for Solar PV Systems

The DTSU666-H is Huawei's dedicated smart energy meter for solar power management solutions. Built for three-phase electrical installations, it supports a rated current of 250A, making it suitable for large residential systems, commercial premises, and light industrial applications.

Role in a Photovoltaic Installation

In a solar system paired with a Huawei SUN2000 inverter, the DTSU666-H is installed at the grid connection point. It continuously measures incoming and outgoing energy flows, allowing the inverter to dynamically adjust its output based on the site's real-time consumption. This bidirectional measurement capability is essential for maximising self-consumption and managing grid export.

Compatibility and Integration

The DTSU666-H is designed to work seamlessly with Huawei SUN2000 series inverters and integrates with the FusionSolar monitoring platform. Communication between the meter and the inverter is handled via the RS485/Modbus protocol, a standard interface in professional PV installations. This native compatibility simplifies commissioning and ensures reliable data reporting for both production and consumption.

Installation and Wiring

The meter is designed for DIN rail mounting inside an electrical enclosure. The three-phase 250A connection must be carried out by a qualified electrician in accordance with applicable local standards. It is advisable to verify compatibility with the local distribution network operator (DNO) prior to commissioning.

Who Is This Meter For?

• PV installers working with Huawei SUN2000 inverters
• Homeowners installing a three-phase solar self-consumption system
• SMEs monitoring their solar energy production and consumption
• Energy management system (EMS) integrators

The DTSU666-H is available from Wattuneed, a specialist solar PV e-commerce retailer serving France and Belgium.