ANMA System Building

Identity

category	smart_meters
ean	UNKNOWN
legal_entity_printed	HUAWEI (Manufacturer field on the Huawei spec page)
manufacturer	Huawei
market_version	single-phase (1P2W)
marketing_name	Smart Power Sensor
model	DDSU666-H
mpn	UNKNOWN
product_family	Huawei Smart Power Sensor (DDSU666-H / DTSU666-H)
product_status	active
region	global
sku	UNKNOWN

Electrical

accuracy_class	voltage +/- 0.5%; current/power/energy +/- 1% (datasheet 'Voltage Accuracy', 'Current/Power/Energy Accuracy'). A formal IEC accuracy class is not stated.
accuracy_current_voltage_pct	± 0.5%
accuracy_frequency_hz	± 0.01 Hz
accuracy_power_energy_pct	± 1%
ct_ratio	100 A / 40 mA
ct_supplied	1 CT 100 A / 40 mA (5 m / 16.4 ft.)
export_limitation_support	True
frequency_hz	UNKNOWN
max_current_a	100 (datasheet 'Current Range 0 ~ 100A') - now confirmed from a fetched Huawei document, replacing the previous distributor-sourced note Huawei Smart Power Sensor datasheet (DDSU666-H / DTSU666-H), Version No.: 02-(20181229) — DDSU666-H column, 'Current Range 0 ~ 100A'
measurement_current_a	0 - 100 A
measurement_method	external current transformer (not direct)
measurement_phase_voltage_v	176 V AC - 288 V AC
measurement_type	UNKNOWN (datasheet does not state direct-connected vs CT-operated)
modbus_rtu	True
modbus_tcp	UNKNOWN
phase_configuration	single-phase
phase_type	single-phase Huawei Smart Power Sensor datasheet (DDSU666-H / DTSU666-H), Version No.: 02-(20181229) — DDSU666-H column, 'Power Grid Type 1P2W'
power_consumption_w	<= 0.8 disputed Huawei Smart Power Sensor datasheet (DDSU666-H / DTSU666-H), Version No.: 02-(20181229) — DDSU666-H column, 'Power Consumption <= 0.8W'
power_grid_type	1P2W
rs485	True
sources	[{'url': 'https://ske-solar.com/productdata/SUN2000-L1/02_Manuals/User%20Manual_SUN2000-2-6KTL-L1_V20_2024-05-30_EN.pdf', 'title': 'SUN2000-(2KTL-6KTL)-L1 User Manual Issue 20 (names DDSU666-H as supported smart power sensor)', 'doc_type': 'manual', 'publisher': 'Huawei (hosted by authorized distributor SKE Solar)', 'revision': 'Issue 20', 'doc_date': '2024-05-30', 'language': 'en', 'region': 'EU', 'accessed': '2026-09-01', 'confidence': 'manufacturer-documented'}]
supply_input_voltage_v	176 V AC - 288 V AC
supported_inverter_brands_models	['Huawei SUN2000-(2KTL-6KTL)-L1 (single-phase power meter recommended for single-phase-only networking; only permitted sensor for the Spanish version)']
voltage_range	176 Vac ~ 288 Vac (input power and phase voltage)

Physical / mechanical

cable_gland_sizes	UNKNOWN
depth_mm	65.5 Huawei Smart Power Sensor datasheet (DDSU666-H / DTSU666-H), Version No.: 02-(20181229) — DDSU666-H column, 'Dimension (HWD) 36 * 100 * 65.5mm'
dimensions_h_w_d_mm	100 mm x 36 mm x 65.5 mm (3.9 in. x 1.4 in. x 2.6 in.)
din_modules	UNKNOWN
din_rail_type	DIN35 Rail
enclosure_material	UNKNOWN
height_mm	100 (INFERRED, same reasoning)
mounting_type	['DIN-rail'] disputed
shipping_weight_kg	UNKNOWN
torque_specs	UNKNOWN
weight_basis	including cables
weight_kg	1.2 Huawei Smart Power Sensor datasheet (DDSU666-H / DTSU666-H), Version No.: 02-(20181229) — DDSU666-H column, 'Weight 1.2 kg (2.6 lb)'
width_mm	36 (INFERRED ordering: the datasheet label reads 'Dimension (HWD) 36 * 100 * 65.5mm'; the current official page for the sibling DTSU666-H gives 'Dimensions (H x W x D) 100 mm x 72 mm x 65.5 mm', i.e. height 100 mm, so 36 mm is the DIN-rail width - consistent with a 2-module single-phase DIN meter)

Installation

accessories_supplied	RS485 Cable (10 m / 33 ft.), 1 CT 100 A / 40 mA (5 m / 16.4 ft.)
connected_device	Huawei inverter or SmartLogger via RS485
import_export_measurement	UNKNOWN - no explicit sign convention published in the fetched documents.
indoor_outdoor	UNKNOWN
mounting_orientation	DIN35 rail mount (orientation not stated in the fetched source)
topology	DIN-rail mounted at the single-phase grid connection point, one CT on the live conductor.

Environment

cooling_method	natural convection (passive)
ip_rating	UNKNOWN (not stated in the Smart Power Sensor datasheet)
max_altitude_m	UNKNOWN
max_operating_altitude_m	UNKNOWN
operating_humidity_pct_rh	5% RH - 95% RH (non-condensing)
operating_temperature_c	-25 to +60
relative_humidity	5% ~ 95% (non-condensing)
storage_temperature_c	-40 to +70

Interfaces & connectors

baud_rate_bps	9600
communication_interface	RS485
ethernet	UNKNOWN
modbus_address_range	UNKNOWN for this model (11-19 is documented for DTSU666-H; NOT carried across)
modbus_rtu	Yes (datasheet row 'Protocol Modbus-RTU') Huawei Smart Power Sensor datasheet (DDSU666-H / DTSU666-H), Version No.: 02-(20181229) — DDSU666-H column, 'Interface RS485' / 'Protocol Modbus-RTU'
modbus_tcp	UNKNOWN
protocol	Modbus-RTU
protocol_notes	Interface RS485, protocol Modbus-RTU (Smart Power Sensor datasheet 02-(20181229)). Baud rate not stated for this model in the fetched source.
register_map_public	UNKNOWN
rs485	Yes
wifi	UNKNOWN

Controls & display

buttons	UNKNOWN
display_type	UNKNOWN
leds	UNKNOWN

Certifications

emc	['UNKNOWN']
list	UNKNOWN
other	[]
regional	['UNKNOWN']
safety	['UNKNOWN']

Warranty & service

standard_warranty_years	UNKNOWN
standard_years	UNKNOWN

Documents

datasheet DTSU666-H 100A - official Specs page (HTML) - used only as the source of the CHINT manufacturer statement for the sibling model rev UNKNOWN

datasheet Huawei Smart Power Sensor datasheet (DDSU666-H / DTSU666-H), Version No.: 02-(20181229) rev 02-(20181229)

datasheet Smart Power Sensor Technical Specification (DDSU666-H / DTSU666-H / DTSU666-H 250A) rev 06.2025

spec_page DDSU666-H Specs (product spec page) rev UNKNOWN

Recorded conflicts

physical.mounting_type Review required

['DIN-rail'] — stored value

DIN35 Rail — incoming package

Detected during import huawei-fusionsolar-full-portfolio-2026-09-03

electrical.power_consumption_w Review required

<= 0.8 — stored value

≤ 0.8 W — incoming package