Huawei SUN2000-3/4/5/6/8/10KTL-M1

Residential hybrid PV inverter

Huawei's high-current M1 family spans 3 to 10 kW. The full-family manual separates the SmartLogger/cascade pair from the shared meter/battery pair. The newer linked manual covers a narrower China-market variant. Huawei’s model-listed interface definition supplies read-only identity, power and frequency registers and specifies Modbus RTU over RS485. Use the published revision as a best-effort starting map, confirm identity and compare live values. This does not imply an open TCP server on an optional Smart Dongle or a tested Edge installation.

Huawei SUN2000-3/4/5/6/8/10KTL-M1 inverter
  • Modbus RTU

Residential hybrid PV inverter

Compatibility

Documented Modbus RTU monitoring

Huawei’s model-listed interface definition supplies read-only identity, power and frequency registers and specifies Modbus RTU over RS485. Use the published revision as a best-effort starting map, confirm identity and compare live values. This does not imply an open TCP server on an optional Smart Dongle or a tested Edge installation.

SUN2000-3/4/5/6/8/10KTL-M1. Published baseline SUN2000MA V100R001C00; record actual firmware and compare identity/values. Read-only RS485 monitoring; preserve commissioned meter, battery, export-limit and protection control. No optional Dongle TCP endpoint is assumed.

Connect it with

An available inverter communications pair is configured for an external Modbus RTU reader; preserve an existing logger/master and the meter/battery bus

  • Wired
  • Edge
  • Platforms
Residential hybrid PV inverter
Interface
Gateway
Edge
Output
SUN2000-3/4/5/6/8/10KTL-M1SUN2000 inverter communications pair
Protected EthernetSegmented LAN
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeProtocol client + point model
Customer platformMQTT · API · files
Ethernet
Protected Ethernet
Runs locally
Optional onward data
Huawei's high-current M1 family spans 3 to 10 kW. The full-family manual separates the SmartLogger/cascade pair from the shared meter/battery pair. The newer linked manual covers a narrower China-market variant. Use the inverter communications pair identified in the installation manual, not the meter/battery pair. Keep one master on each RS485 bus. The interface definition supplies the read map; an optional Smart Dongle network uplink is a separate path. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
SUN2000-3KTL-M1 and 4KTL-M13 or 4 kW AC rating in Huawei's high-current datasheet; older six-model manual defines the COM connectorThe linked 2026 manual's Purpose omits these ratings. Match the installed high-current revision and its own manual before using the older pin table.
SUN2000-5/6/8/10KTL-M15, 6, 8 or 10 kW AC rating; two MPPTs and optional Smart Dongle networkingThe 2026 manual covers similarly named China-market variants. Verify regional hardware and firmware before transferring any accessory or point assumption.
SUN2000-10KTL-BEM1, 12KTL-M1, M0, M5 and MB0Different variant, rating or generation, excluded from this guideDo not reuse their electrical ratings, battery features or communications contract for the six high-current M1 models.

Specifications

Huawei's March 2022 manual explicitly names all six ratings and defines the COM plant and meter/battery pairs. The later Issue 28 manual linked from today's support page instead limits its Purpose to 5, 6, 8, 10 and 12KTL-M1 plus 10KTL-BEM1, and says those models are intended for China. Its meter compatibility thresholds and accessory options must not be silently applied to European high-current units.23

High-current models
SUN2000-3, 4, 5, 6, 8 and 10KTL-M11
Rated AC power
3, 4, 5, 6, 8 or 10 kW respectively1
PV tracking
Two MPP trackers1
Logger/cascade connection
2022 manual: COM pins 1/3 or 2/4, RS485A1/B12
Meter/battery connection
2022 manual: COM pins 7/9, shared RS485A2/B22
Optional communications
Huawei WLAN-FE or 4G Smart Dongle; third-party read endpoint not established12
Enclosure
IP65; site installation and thermal limits still apply1

Interface

Documented measurements and integration boundaries for SUN2000-3/4/5/6/8/10KTL-M1.

  • The 2022 full-family manual's COM pin table assigns RS485A1/B1 on pins 1/3 or 2/4 to the inverter cascade or SmartLogger. The two parallel pairs are plant-network connections, not evidence of an unrestricted external client port.
  • RS485A2/B2 on pins 7/9 is shared by the power meter and battery in the same manual. Trace both loads and their configured addresses before changing wiring; a meter's protocol does not define the inverter's own telemetry map.
  • The older manual says a Smart Dongle network and SmartLogger network are alternative topologies. Its WLAN-FE Dongle is SDongleA-05 and 4G Dongle is SDongleA-03. A Dongle's Ethernet uplink alone does not prove a local inverter Modbus TCP server.
  • Huawei's high-current datasheet lists LUNA2000-S0 and S1 battery families and a BackupBox-B1 option. Actual battery, backup and charging functions depend on installed firmware and accessory revision.
  • For site import, export or VPP flexibility, establish the grid-point meter, direction convention and control owner separately. Inverter output cannot establish net site power or dispatch permission.

Assessment

SUN2000-3/4/5/6/8/10KTL-M1. Published baseline SUN2000MA V100R001C00; record actual firmware and compare identity/values. Read-only RS485 monitoring; preserve commissioned meter, battery, export-limit and protection control. No optional Dongle TCP endpoint is assumed.

InteroperabilitySupported with conditions
Huawei lists this model family and Modbus RTU read registers; available bus role and optional network accessories remain site-specific.124
AccuracyNot yet assessed
OEM identity, signed power, frequency, types and gains are documented. Installed measurement accuracy and physical polling behavior have not been measured.24
SecurityNot yet assessed
Read-only permission and network access for the installed logger or Dongle remain unidentified.2
ReliabilityNot yet assessed
The public Modbus definition establishes response format; installed polling capacity, stale-data handling and recovery have not been measured.24
RuggednessSupported with conditions
The high-current datasheet lists IP65 and a -25 to +60 °C envelope, subject to siting, cable sealing and thermal derating.1
ScalabilityNot yet assessed
The 2022 manual describes Huawei cascade limits, but external polling capacity is not proven for this hardware and site.2
LifecycleSupported with conditions
Huawei publishes exact six-model high-current specifications and an older full-family manual. The later linked manual has a different market scope, so retain revision-matched documentation with the installed unit.123

Setup

Identify the inverter and read active power

A best-effort read-only start from the model-listed Huawei interface definition. Use the configured inverter address and serial framing on an available, installer-approved RS485 link. Keep the meter/battery bus and existing plant master separate. Addresses below are literal Modbus PDU addresses.

Read identity
FC03 model name at 30000, 15 registers: PDU 03 75 30 00 0F. Serial number at 30015, 10 registers: 03 75 3F 00 0A. Model ID at 30070, one U16: 03 75 76 00 01. Compare the returned name and serial with the nameplate; use the model-ID table for this family, not an ID from another SUN2000 generation.
Signed active power
FC03 address 32080, quantity 2: PDU 03 7D 50 00 02. Active power is signed I32 with gain 1000, unit kW. Join the most-significant word first and divide by 1000. Synthetic 00 00 13 88 gives 5000 ÷1000 = 5.000 kW; FF FF EC 78 gives -5.000 kW. These are decoder fixtures, not measurements. Do not treat the pair as Float32 or divide twice when displaying W.
Frequency and comparison
FC03 address 32085, quantity 1: PDU 03 7D 55 00 01. Frequency is U16, gain 100, in Hz. Synthetic 13 88 gives 5000 ÷100 = 50.00 Hz. Compare fresh active power and frequency with Huawei’s local view. Keep inverter production distinct from the site meter’s signed import/export and storage measurements.
Addressing and response quality
Use the configured slave address and standard RTU CRC16; the PDUs above omit that envelope. Keep exceptions, incomplete responses and timeouts unavailable rather than zero. If identity fails, check slave address, serial framing and A/B polarity first. Do not copy a SunSpec unavailable-value sentinel into this Huawei map. Begin with a small read-only point set and preserve the existing bus master.

Acceptance: The published map provides a concrete monitoring start; verify identity and values on the installed equipment. Physical Edge operation remains untested. Battery, export-limit, grid and protection writes stay with the commissioned plant owner.

  1. Identify the regional M1

    Record the full nameplate, high-current hardware version, SUN2000MA firmware, installed battery and grid code. The six-model high-current datasheet and 2026 China-market manual have different scope.

  2. Map the commissioned COM connections

    Check the installed manual before using the 2022 pin table. Trace both RS485A1/B1 cascade or logger pairs and the shared RS485A2/B2 meter/battery pair without disturbing existing control wiring.

  3. Identify the external data owner

    Determine whether the system uses a SmartLogger or a Smart Dongle, and record its exact hardware, firmware, network and access policy. A Huawei accessory port is not automatically an open third-party endpoint.

  4. Identify the inverter and read active power

    FC03 model name at 30000, 15 registers: PDU 03 75 30 00 0F. Serial number at 30015, 10 registers: 03 75 3F 00 0A. Model ID at 30070, one U16: 03 75 76 00 01. Compare the returned name and serial with the nameplate; use the model-ID table for this family, not an ID from another SUN2000 generation.

  5. Qualify grid and storage separately

    Document the point-of-connection meter, import/export sign and battery controller separately from inverter production. Keep export limitation and backup operation under their commissioned control system.

Sources

  1. SUN2000-3/4/5/6/8/10KTL-M1 High Current Version datasheet, 01-202411 (opens in a new tab) (PDF) Huawei
  2. SUN2000-(3KTL-10KTL)-M1 User Manual, Issue 05, 10 March 2022 (opens in a new tab) (PDF) Huawei
  3. SUN2000-(3KTL-10KTL)-M1 User Manual, Issue 28, 30 March 2026; China-market model scope (opens in a new tab) Huawei
  4. Huawei Solar Inverter Modbus Interface Definitions, Issue 04, 18 October 2022 (public mirror) (opens in a new tab) Huawei

Further reading

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