CHINT DTSU666 (and DTSU666-CT variant)
Official manufacturer GLOBAL verified Aug. 31, 2026
Identity
| category | smart_meters |
| manufacturer | CHINT |
| model | DTSU666 (and DTSU666-CT variant) |
| region | GLOBAL |
Electrical
| ac_supply_frequency | 50Hz |
| ac_supply_voltage | 100-265V |
| accuracy_class | Active power Class 1; Reactive power Class 2 (Deye Energy Meter page) |
| ct_ratio | N/A base (direct to 80A); DTSU666-CT is CT-based for higher-capacity installs |
| deye_pairing | Sold by Deye as one of its five approved energy meters (Deye 'Energy Meter' accessory page). Deye's own SUN-5/6/8/10/12K-SG04LP3-EU user manual (2025-11-15) offers 'Meter Select / No Meter 0/3 / CHNT / Eastron' in the inverter menu (p.43) and shows the CHINT meter wiring on pp.22-23. |
| direct_measurement_phase_to_neutral | 100-265V |
| direct_voltage_measurement_between_phases | 176-458V |
| export_limitation_support | True |
| max_current_a | 80 |
| max_devices_on_bus | 32 |
| measurement_type | direct (base 80A); CT-based (DTSU666-CT) |
| modbus_rtu | True |
| modbus_tcp | False |
| phase_type | three-phase, four-wire |
| power_consumption | <=1.5W / 6VA |
| rs485 | True |
| supported_inverter_brands_models | ['Deye (official zero-export meter, Deye-hosted manual PDF)', 'Sungrow ("Sungrow Three-Phase Smart Energy Meter DTSU666-20 CT")', 'Huawei (base hardware for the rebranded DTSU666-H, unconfirmed)'] |
Physical / mechanical
| depth_mm | 66 |
| height_mm | 72 |
| mounting_type | ['DIN-rail'] |
| weight_kg | 0.44 |
| width_mm | 100 |
Environment
| ip_rating | IP51 |
| operating_temperature_c | -25 to +55 (Deye page 'Regulated working temperature range') |
| relative_humidity | <=75% |
| storage_temperature_c | -40 to +70 ('Limited working temperature range') |
Controls & display
| display_type | LCD |
| local_display | True |
Warranty & service
| conditions | Deye Energy Meter page row 'Warranty | 1.5 years' (Deye's accessory warranty, not CHINT's) |
| standard_years | 1.5 |
Documents
user-manual
{# Located but never retrieved: listed, but deliberately not linked, and it
backs no stored value. #}
CHINT three-phase instruction manual DT(S)SU666 Y0.464.1002 V1.5 (hosted by Deye) — located, not retrieved
rev V1.5 (2019-06-17)
user-manual
Deye Hybrid Inverter User Manual SUN-5/6/8/10/12K-SG04LP3-EU (2025-11-15)
rev 2025-11-15