Chint DTSU666
Description
80 A direct measurement in a 36 mm DIN-rail housing.
Chint DDSU666 is a 36 mm wide, 80 A direct-connect single-phase smart energy meter delivering Class 1.0 accuracy and high-speed RS485 Modbus RTU telemetry, engineered for dynamic zero-export control and solar self-consumption optimization on residential single-phase hybrid inverters.
80 A Direct-Connect Measurement
Handles full single-phase domestic service currents directly, eliminating external CT wiring in residential distribution boxes.
36 mm DIN-Rail Housing
Allow 36 mm of width for the meter in the distribution board.
Class 1.0 High-Precision Measurement
Accurately measures active power, voltage, current, and bidirectional kWh energy totals in real time.
Universal Inverter Compatibility (Modbus RTU)
Pre-calibrated communication profile natively supported by SAJ, GoodWe, and major single-phase hybrid inverters.
More product details
Residential consumer units frequently lack space for bulky multi-module meters or external CT wiring. The DDSU666 provides full 80 A direct current measurement in a 36 mm wide housing.
- Direct measurement up to 80 A covers standard single-phase 230 V domestic services (up to 18 kVA).
- Eliminates CT orientation errors and loose secondary sensor wiring.
- Measures active energy, voltage, current, and frequency simultaneously with backlit LCD readout.
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3 models
Accuracy class
—
Class B/ 1.0
Class C/ 0.5S
Communication
RS485
Modbus-RTU
Modbus-RTU
Weight
200 g
0.33 kg (Approx.)
0.33 kg (Approx.)
Dimensions
—
72mm × 100mm × 65mm
72mm × 100mm × 65mm
Sub-second zero-export closed-loop control with certified precision.
Executing tight single-phase feed-in limitation requires rapid communication between the meter and the hybrid inverter. The DDSU666 transmits bidirectional power data at up to 9600 baud. High-speed RS485 Modbus RTU interface broadcasts power metrics to inverters every few hundred milliseconds. Enables dynamic zero-export and self-consumption optimization without overshoot. The meter is 36 mm wide and mounts on a standard 35 mm DIN rail.
Direct to 80 A on one phase
220, 230 or 240 V nominal with a wide 0.7 to 1.2 Un tolerance, and the line runs through the meter itself. On a standard house connection that removes the entire transformer question from the order.
Under 1 W to run
1 W or less continuously, 5 VA at its instantaneous peak. It is powered every hour the house is connected, which is precisely why the number is worth being small.
RS485 to whatever limits the export
One communication pair to the inverter or energy manager - the live active measurement is what a feed-in limit is calculated from, and what makes stored energy go to the house rather than the grid. CE and RoHS.
Technical data
36 mm wide housing for single-phase hybrid solar and dynamic export regulation.
Single-phase 80 A direct-connect smart meter with Modbus RTU communication.
Engineered to measure single-phase household energy flows, the Chint DDSU666 handles direct currents up to 80 A without external current transformers. It delivers high-precision real-time power data to single-phase hybrid inverters (including SAJ and GoodWe), enabling dynamic solar self-consumption and strict zero-export limitation.
- Direct Connect
- 80 A
- Width
- 36 mm
- Fast Telemetry
- < 1s
- High Precision
- Class 1.0
Model and type
- Application
- Single phase
- Installation
- mounting rack
- Display
- LCD
Electrical
- Nominal voltage
- 220,230,240 V
- Operating range
- 0.7~1.2 Un
- Maximum current
- 80 A
- Frequency
- 50/60 Hz ±5 Hz
- Power consumption
- ≤1 W
- Maximum instantaneous consumption
- ≤5 VA
Communication
- Interface
- RS485
Environment and mechanics
- Operating temperature
- -40~60 °C
- Ambient humidity
- 0-95% Non-condensing
- Ingress protection
- IP54
- Dimensions
- 98*36*65 mm
- Weight
- 200 g
Compliance
- Applicable standard
- CE, ROHS
Project fit
Where this model fits.
Scenarios that show which projects the Chint DDSU666 (single-phase DIN-rail smart meter, direct to 80 A) belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
Single-Phase Residential Solar Installations (up to 80 A Service)
Single-family homes or apartments with 230 V single-phase grid service installing a single-phase hybrid inverter (such as SAJ H2 or GoodWe ES/EM).
The 36 mm wide housing requires that width to be available in the distribution board.
- FitAllow 36 mm of width in the distribution board for the meter housing.
What Linker confirms with you
- Confirm this model against the adjacent rating in the same family
Documents
Smart meter datasheet (DDSU666 / DTSU666, EN) SAJ Smart Meter DTSU666 DatasheetProduct questions
What is the maximum wire gauge accepted by the DDSU666 direct terminals?
Up to 16 mm² to 25 mm² stranded copper conductors. The meter's heavy-duty brass tunnel terminals accept up to 16 mm² stranded copper cable (or 25 mm² solid), accommodating standard residential single-phase service cables up to 80 A.
