Huawei DDSU666-H Single-Phase Smart Meter
The DDSU666-H is Huawei's single-phase smart meter for photovoltaic systems: it measures current, voltage, power and energy with an LCD display, communicates via Modbus-RTU RS485 with SUN2000 inverters and mounts on a DIN35 rail.
The DDSU666-H is a Huawei single-phase smart meter designed to measure current, voltage, power and energy in photovoltaic systems. It integrates with Huawei SUN2000 inverters via RS485 Modbus-RTU, has a built-in LCD display and mounts on a DIN35 rail.
What is the smart meter for?
The smart meter measures in real time the energy exchanged at the grid connection point, information essential for self-consumption logic and grid feed-in control (zero feed-in). The inverter uses the meter data to regulate production and storage based on the home's actual consumption.
DDSU666-H technical specifications
| Manufacturer | Huawei |
| Model | DDSU666-H |
| Type | Single-phase smart meter |
| Measured quantities | Current, voltage, power, energy |
| Display | Built-in LCD |
| Communication | RS485 Modbus-RTU |
| Mounting | DIN35 rail |
| Compatibility | Huawei SUN2000 inverters |
Frequently asked questions
Is it for single-phase or three-phase systems?
The DDSU666-H is dedicated to single-phase systems. For three-phase systems the DTSU666-H model is used.
Which inverters is it compatible with?
It is compatible with Huawei SUN2000 inverters, with which it communicates via RS485 Modbus-RTU to provide the data required for self-consumption and feed-in control logic.
How is it installed?
It mounts on a DIN35 rail inside the electrical panel. The connection must be made by a qualified electrician according to the Huawei diagram and applicable standards.
Is it needed for zero grid feed-in?
Yes. By providing the inverter with the real-time measurement of energy at the grid point, the smart meter enables export control and zero feed-in functions, as well as self-consumption monitoring.
