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CHINT DDSU666 (and DDSU666-CT variant)

Official manufacturer global verified Aug. 31, 2026

CHINT DDSU666 (and DDSU666-CT variant)
PRODUCT PHOTO · CHINT
UNKNOWN

Identity

category smart_meters
ean UNKNOWN
manufacturer CHINT
market_version MID B+D certified (CHINT Global product page)
model DDSU666 (and DDSU666-CT variant)
mpn UNKNOWN
product_family DDSU666 single-phase DIN-rail smart meter
product_status active
region global
sku UNKNOWN

Electrical

ac_supply_frequency 50/60Hz
ac_supply_voltage 176-264V
accuracy_class Active power Class 1; Reactive power Class 2 (Deye Energy Meter page)
ct_ratio N/A base model (direct); DDSU666-CT variant uses external CT
deye_pairing Sold by Deye as one of its five approved energy meters (Deye 'Energy Meter' accessory page, column 'CHNTDDSU666'). Deye's page describes it as: 'The DSU666/SDM230-M Single-phase electronic type guide rail mounting electric energy meters ... transfer this info to solar inverter via RS485 communication in zero-export system.'
direct_measurement_phase_to_neutral 176~264V
export_limitation_support True
max_current_a 60
max_devices_on_bus 32
measured_parameters Import/export kWh and kvarh; instantaneous kW, kvar, kVA; Irms, Vrms, frequency, power factor
measurement_type direct (base); CT-based (DDSU666-CT)
modbus_rtu True
modbus_tcp False
phase_type single-phase
power_consumption <=1W / 8VA
pulse_output 800 imp/kWh (CHINT Global product page, 'constant')
Deye Energy Meter product page (HTML technical specification table for CHNT DDSU666, CHNT DTSU666, EASTRON SDM 230 Modbus, SDM 630-Modbus V2, SDM 630 MCT V2) — CHINT Global DDSU666 product page, Measurement row: '800imp/kWh constant'
rs485 True
supported_inverter_brands_models ['Deye (official Deye-resold accessory)', 'GoodWe/SolaX ecosystems (SolaX publishes DDSU666-CT/DTSU666-CT user manual)']
wiring_configurations 1P2W

Physical / mechanical

depth_mm 66
height_mm 85
mounting_type ['DIN-rail']
weight_kg 0.21
width_mm 36

Environment

ip_rating IP51
operating_temperature_c -25 to +55
relative_humidity <=75%
storage_temperature_c -40 to +70

Interfaces & connectors

baud_rates 1200-19200 bps (default 9600)
Deye Energy Meter product page (HTML technical specification table for CHNT DDSU666, CHNT DTSU666, EASTRON SDM 230 Modbus, SDM 630-Modbus V2, SDM 630 MCT V2) — CHINT Global DDSU666 product page, Communication row
modbus_rtu yes - Modbus-RTU
rs485 yes

Controls & display

display_type LCD
Deye Energy Meter product page (HTML technical specification table for CHNT DDSU666, CHNT DTSU666, EASTRON SDM 230 Modbus, SDM 630-Modbus V2, SDM 630 MCT V2) — CHINT Global DDSU666 product page, Display row
local_display True

Certifications

metrology ['EN 50470-1', 'EN 50470-3 (Class B / 1.0)']
other []
regional ['MID B+D certified (CHINT Global product page)']

Warranty & service

conditions Deye Energy Meter page row 'Warranty | 1.5 years'
standard_years 1.5

Documents

datasheet {# Located but never retrieved: listed, but deliberately not linked, and it backs no stored value. #} DDSU666 Catalog — located, not retrieved
datasheet Deye Energy Meter product page (HTML technical specification table for CHNT DDSU666, CHNT DTSU666, EASTRON SDM 230 Modbus, SDM 630-Modbus V2, SDM 630 MCT V2)
datasheet Deye accessory service guide - energy meters
product-page CHINT Global DDSU666 product page
user-manual {# Located but never retrieved: listed, but deliberately not linked, and it backs no stored value. #} DDSU666 Single phase Smart Meter manual — located, not retrieved

Recorded conflicts

physical.weight_kg Review required
0.21 — existing record (Deye page)
0.22 — CHINT Global DDSU666 product page
rounding or build difference
ac_supply_voltage Review required
176-264V — existing record (Deye page)
220V-240V nominal, 0.9Un-1.1Un operating range (i.e. 198-264 V) — CHINT Global DDSU666 product page
Deye quotes a wider survival range; CHINT quotes the metrological range around Un
environment.relative_humidity Review required
<=75% — existing record (Deye page)
<=95% RH non-condensing — CHINT Global DDSU666 product page
different document revisions / rebranded build
environment.storage_temperature_c Review required
-40 to +70 — existing record (Deye page)
-35 to +70 — CHINT Global DDSU666 product page
different document revisions / rebranded build
environment.ip_rating Review required
IP51 — existing record (Deye Energy Meter accessory page)
IP20 — CHINT Global DDSU666 product page, Environment row, fetched 2026-09-02
IP51 is typically the front-panel rating and IP20 the terminal rating; the two pages quote different faces of the same enclosure, or different builds
max_current_a Review required
60 — existing record (Deye Energy Meter accessory page, column 'CHNTDDSU666')
0.25-5(80) A, i.e. Imax 80 A — CHINT Global DDSU666 product page, Current row, fetched 2026-09-02
current-rating sub-variant: CHINT catalogues DDSU666 in several Ib(Imax) ratings; Deye resells a 60 A build while CHINT's global page shows the 5(80) A build
physical.weight_kg Review required
0.21 — existing record (Deye page)
0.22 — CHINT Global DDSU666 product page
rounding or build difference
ac_supply_voltage Review required
176-264V — existing record (Deye page)
220V-240V nominal, 0.9Un-1.1Un operating range (i.e. 198-264 V) — CHINT Global DDSU666 product page
Deye quotes a wider survival range; CHINT quotes the metrological range around Un
environment.relative_humidity Review required
<=75% — existing record (Deye page)
<=95% RH non-condensing — CHINT Global DDSU666 product page
different document revisions / rebranded build
environment.storage_temperature_c Review required
-40 to +70 — existing record (Deye page)
-35 to +70 — CHINT Global DDSU666 product page
different document revisions / rebranded build
environment.ip_rating Review required
IP51 — existing record (Deye Energy Meter accessory page)
IP20 — CHINT Global DDSU666 product page, Environment row, fetched 2026-09-02
IP51 is typically the front-panel rating and IP20 the terminal rating; the two pages quote different faces of the same enclosure, or different builds
max_current_a Review required
60 — existing record (Deye Energy Meter accessory page, column 'CHNTDDSU666')
0.25-5(80) A, i.e. Imax 80 A — CHINT Global DDSU666 product page, Current row, fetched 2026-09-02
current-rating sub-variant: CHINT catalogues DDSU666 in several Ib(Imax) ratings; Deye resells a 60 A build while CHINT's global page shows the 5(80) A build

Additional documented parameters

Recorded verbatim from the source; no schema field exists for these yet.

Dimensions (as printed on CHINT product page)100mm x 36mm x 36mm x 65.5mm

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