The single-phase meter that measures at the connection point what comes in and what goes out, so that the Huawei inverter can limit the injection into the grid. Direct connection up to 100 A, consumption below 1 W.
It is the device that tells the inverter what is happening where the current enters the house: how much is being consumed at that moment and how much would go to the grid. Based on this information the inverter decides how much it produces, when it charges the battery and when it discharges it, so that the energy from the panels is used in the house. It is also the source of the figures in the reports you see in the app. It does not interrupt the current, it only measures and reports.
It is mounted on a DIN rail, in the connection switchboard, and is wired directly into the circuit, without additional accessories, for currents of up to 100 A — enough for an ordinary home. The measurement is bidirectional, that is it tracks separately the energy bought and the energy sent to the grid, and the values stay stored even after a power cut, so the history is not lost. It has a display on which the voltage, the current, the active and reactive power, the frequency and the imported and exported energy can be checked on the spot, without needing a phone. Its own consumption is below 1 W, so it adds practically nothing to the bill, and the maintenance is zero.
DDSU666-H, single-phase 1P2W grid, direct connection up to 100 A without current transformers, mounting on a 35 mm DIN rail. The voltage range of the DDSU/DTSU666-H series is 176-288 V AC, the accuracy exceeds class 1, its own consumption is below 1 W. RS485 communication in Modbus RTU at 9600 bps with the inverter, for limiting the power injected into the grid (including zero export), prioritising self-consumption and controlling the charging/discharging of the LUNA2000 batteries in hybrid systems. The standard solution for single-phase household prosumers with Huawei SUN2000 L1/M1 inverters and a Smart Dongle.
Suitable for a home with a single-phase connection and a Huawei SUN2000 inverter, which needs the injection into the grid to be limited, the control of a LUNA2000 battery or just correct consumption reports.
| Grid type | Monofazat 1P2W |
|---|---|
| Current | Până la 100 A, conectare directă (fără CT) |
| Phase voltage (DDSU/DTSU666-H series) | 176–288 V c.a. |
| Accuracy | Peste clasa 1 |
| Own consumption | ≤ 1 W |
| Communication | RS485, Modbus RTU, 9600 bps |
| Display | LCD |
| Mounting | Șină DIN 35 mm |
| Measurement | Bidirecțională (import / export) |
| Compatibility | Invertoare Huawei SUN2000 + Smart Dongle |
Series-level specifications — valid for the product family
DDSU666-H is the single-phase smart meter (Smart Power Sensor) used by the Huawei SUN2000 inverters for reading the power at the connection point. It is mounted on a 35 mm DIN rail in the connection switchboard and is wired directly into the circuit, for currents of up to 100 A, without external current transformers. The voltage range of the DDSU/DTSU666-H series is 176–288 V AC per phase.
The measurement accuracy exceeds class 1, and the total own consumption is below 1 W. The meter has an LCD display for the local checking of the voltage, the current, the active and reactive power, the frequency and the imported and exported energy, the measurement being bidirectional. The data stays stored even after a supply interruption.
The link to the inverter is made over RS485 in the Modbus RTU protocol at 9600 bps. Based on this data the inverter applies the limitation of the power injected into the grid (including zero export), prioritises self-consumption and, in hybrid systems with a LUNA2000 battery, decides the moment of charging and discharging. It is the standard solution for single-phase household prosumers equipped with Huawei SUN2000 L1/M1 inverters and a Smart Dongle.
The module that gives a Huawei inverter internet through a SIM card, where the fixed network does not reach. It plugs into the USB port, serves up to 10 inverters, IP65.
The meter that tells the Huawei inverter how much the building consumes, so that it does not send current into the grid. Three-phase, up to 250 A per phase, through the included current transformers.
It shows in real time how much energy enters and leaves the house, so that the installation can regulate itself. Indirect measurement with 3 clamps of 100 A, accuracy ±1%, DIN rail mounting.
See exactly how much energy comes into the house and how much goes out to the grid: a single-phase panel meter, as wide as two fuses, measuring directly up to 100 A and sending the data over Modbus.
