Huawei FusionSolar SCharger-22KT-S0

AC EV charger

A residential AC wall charger with a Type 2 socket and up to 22 kW three-phase output. Huawei lists Modbus TCP and OCPP 1.6, but limits OCPP to residential use without commercial billing. Check the installed firmware and system controller before planning solar-surplus charging or an external monitoring connection.

Huawei SCharger-22KT-S0
  • OCPP 1.6
  • Modbus TCP

AC EV charger

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Compatibility

Compatible with EpiSensor Edge over Modbus TCP

Huawei lists Modbus TCP and OCPP 1.6 for the SCharger-22KT-S0. Edge reads the charger with its Modbus TCP client, using Huawei's register list for the installed firmware. An EpiSensor ZEM-65 electricity monitor with CTs on the charger's supply is a second route for energy, power and current per phase. OCPP stays with a residential backend; Edge does not speak OCPP.

SCharger-22KT-S0 three-phase socket version; the single-phase 7KS-S0 and the newer SCharger-C generation differ, and OCPP is residential-only without commercial billing. Site check: obtain Huawei's S0 register list, port and unit ID for the installed firmware, and confirm in solution manual issue 05, sections 2.1 and 4.4.2, that the system design leaves Modbus TCP free for Edge.

Connect it with

Route into Edge

When Huawei's register list for the installed firmware is available and the system design leaves Modbus TCP free for an external client

  • Modbus
  • Edge
  • Platforms
AC EV charger
Interface
Gateway
Edge
Output
SCharger-22KT-S0SCharger-22KT-S0 Ethernet, Modbus TCP
Protected EthernetSegmented LAN
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeModbus client + register map
Customer platformMQTT · API · files
Modbus TCP
Protected Ethernet
Runs locally
Optional onward data
Connect the charger's Ethernet port to a protected site LAN and set up Edge's Modbus TCP client with the port, unit ID and registers from Huawei's communication document for the installed firmware. Keep Edge read only: leave charge-current limits and solar-control settings to the Huawei system, and do not expose the Modbus service to the internet. The customer-platform output is optional; Edge remains the local system of record.

For energy, power and current per phase on a three-phase charger circuit, with or without a charger data connection

  • Wired
  • Edge
  • Platforms
AC EV charger
Interface
Gateway
Edge
Output
SCharger-22KT-S0SCharger-22KT-S0 three-phase circuit
ZEM-65 electricity monitorMeasures energy, power and current per phase on the charger supply
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeEdge: energy, power and current per phase
Customer platformMQTT · API · files
CTs and voltage reference
EpiSensor wireless
Runs locally
Optional onward data
A qualified electrician fits the ZEM-65's 120 A split-core CTs on L1, L2 and L3 of the charger's dedicated circuit and connects its voltage reference. The ZEM-65 sends energy, power and current per phase over the EpiSensor wireless network to the Gateway, where Edge records them. It measures what the circuit draws, including standby, not the vehicle's state of charge or the backend's session records. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
SCharger-22KT-S0
  • Three-phase 400 V
  • up to 22 kW
  • Type 2 socket
  • Wi-Fi/Ethernet
Edge over Modbus TCP with Huawei's register list for the installed firmware, or a ZEM-65 on the supply.
SCharger-7KS-S0
  • Single-phase 230 V
  • up to 7.4 kW
Related housing, different supply and maximum charging power.
SCharger-CSeparate Smart Charger generationDo not use its controller or communications instructions for the S0 model.

Specifications

The charger supplies AC power to the car; the car’s onboard charger determines how much it accepts. Its 22 kW rating does not guarantee that a particular vehicle charges at 22 kW, and OCPP support does not give access to the vehicle’s battery state of charge.1

Charging output
Up to 22 kW three-phase; adjustable 6–32 A. Minimum power is about 1.4 kW on one phase or 4.2 kW on three phases.1
Supply and connector
400 V ±20%, 50/60 Hz ±1 Hz, TN or TT; Type 2 socket.1
Communications
Wi-Fi or Ethernet; Modbus TCP and OCPP 1.6.1
OCPP scope
Residential scenarios only; commercial billing capability is not supported.1
Authentication
RFID ISO 14443-A, app or Bluetooth.1
Enclosure
335 × 180 × 145 mm, 3.1 kg; IP54, IK10, wall-mounted.1
Operating temperature
−35 to +50 °C at 16 A, or −35 to +40 °C at 32 A.1
Idle consumption
Standby power below 6 W under the manufacturer’s specified conditions.1

Interface

Documented measurements and integration boundaries for SCharger-22KT-S0.

  • Start with charging status, session or cumulative energy and timestamps where the installed interface exposes them. Confirm the exact point list instead of assuming a universal Modbus map.
  • A charger power limit is not a measurement of delivered power. Keep requested limits and measured energy separate.
  • Record whether measurements cover one charging session or the lifetime total, and how counters behave after replacement or reset.
  • Do not infer vehicle battery state of charge or billing approval from OCPP support.

Assessment

SCharger-22KT-S0 three-phase socket version, not the single-phase 7KS-S0 or SCharger-C. OCPP is residential-only without commercial billing. Modbus TCP is named without a published register list.

InteroperabilitySupported with conditions
Huawei documents Modbus TCP and residential OCPP 1.6; the register list for the installed firmware comes from Huawei.1
AccuracyNot yet assessed
Huawei publishes no metering accuracy class for this charger. Where accuracy matters, measure its supply with a ZEM-65.1
SecurityNot yet assessed
Huawei specifies RFID, app and Bluetooth authentication for charging users but no security settings for Modbus TCP. Keep the charger on a protected LAN.1
ReliabilitySupported with conditions
Residual-current (Type A 30 mA plus 6 mA DC), overcurrent, over-temperature and CAT II surge protection are specified, with EN IEC 61851-1 and EN IEC 61851-21-2 EMC compliance.1
RuggednessSupported with conditions
IP54 and IK10 are specified, with different temperature limits at 16 A and 32 A.1
ScalabilityNot yet assessed
Huawei's specification covers one charger in a FusionSolar residential system and gives no multi-charger limit.1
LifecycleNot yet assessed
Huawei's cited documents give no firmware support period or replacement procedure for the S0 model.1

Setup

  1. Confirm the S0 identity

    Record SCharger-22KT-S0, firmware and the local market variant from the unit. Verify the installed mains arrangement and available current with the commissioning installer.

  2. Choose the required function

    Use solution manual issue 05, sections 2.1 and 4.4.2. With a direct FE meter, disable the WLAN/FE Smart Dongle’s Modbus TCP. With an RS485 virtual meter, enable the dongle’s Modbus TCP and use wired networking. This virtual-meter path cannot simultaneously serve a third-party Modbus TCP management client.

  3. Obtain the interface instructions

    Ask Huawei for the S0 Modbus TCP register list for that firmware, with port, unit ID, address convention and write permissions; the datasheet names the protocol only. OCPP goes to an approved residential backend.

  4. Use a controlled network

    Connect over the documented Ethernet or Wi-Fi path and retain authorised commissioning access. Do not expose a prospective Modbus service directly to the internet.

  5. Prove one measurement

    During a known charging session, compare app power and energy with the site meter over the same interval. Review main-breaker capacity and the configured current on meter loss in Advanced Settings. Meter disconnection normally reduces charging to minimum current; distinguish that response from an offline measurement.

  6. Keep charging control separate

    Do not alter charge-current limits or solar-control settings as part of a monitoring check. Record communication failures as unavailable data, not zero consumption.

Common questions

Can this charger support a commercial billing scheme over OCPP?
Huawei explicitly limits this model’s OCPP support to residential scenarios and excludes commercial billing capability. Choose equipment and a complete metering process approved for the intended commercial use.1
Is there a ready-to-import Modbus map here?
No. Huawei's specification names Modbus TCP without a register list. Obtain the communication document for the installed firmware before configuring Edge's Modbus TCP client, or measure the supply with a ZEM-65.1
Will an 11 kW car charge at 22 kW?
No. Actual AC charging power is limited by the vehicle, the available supply and charger configuration. Use the smallest applicable power limit in the charging-time calculator.1
Why can the minimum solar charging power change?
At 6 A, one phase needs about 1.4 kW while three phases need about 4.2 kW. A supported phase-switching system and the actual vehicle determine how those thresholds are used.1

Sources

  1. SCharger-7KS-S0 and 22KT-S0 current technical specifications (opens in a new tab) Huawei
  2. Smart Charger datasheet, version 01-202411 (opens in a new tab) (PDF) Huawei
  3. PV+ESS+Charger solution manual, issue 05: networking and commissioning (opens in a new tab) Huawei

Further reading

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