The DDSU666 is a high-precision single-phase smart meter designed for residential energy storage systems. It provides accurate real-time measurement of grid import/export power, enabling intelligent energy management and reliable anti-backflow control. With RS485 communication and Modbus protocol support, the DDSU666 seamlessly integrates with hybrid inverters and EMS platforms for efficient system monitoring and control. Its compact design, easy installation, and stable measurement performance make it an ideal solution for residential PV and energy storage applications, helping homeowners maximize self-consumption, optimize energy usage, and achieve smarter energy management.

Key Features

Dual-Channel & High Compatibility

100A/40mA dual-channel current measurement.Supports CT1 and CT2 inputs for flexible AC-coupled system applications, providing comprehensive energy monitoring

Fast & Accurate Measurement

High-precision measurement with 50 ms power refresh rate. Measures voltage, current, frequency, active power, power factor and energy, with active power accuracy of up to ±0.5%.

Seamless Communication & Easy Integration

Supports multiple baud rates up to 115200 bps, enabling reliable communication and seamless integration with energy storage systems.

Compact DIN-Rail Design

Designed for single-phase AC-coupled systems, with a compact 36 × 100 × 65.5 mm enclosure and standard 35 mm DIN-rail mounting.