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Device integrations

Sunwoda

Supported devices: Sunwoda OSP200K and NoahX-L261 battery systems over Modbus TCP, each as a battery inverter with its battery.

Our EMS monitors and controls Sunwoda battery systems over Modbus TCP. The system is added as a battery inverter (PCS), and its battery appears as a linked battery device.

Supported devices

Model Power and capacity Battery devices From controller version
OSP200K 200 kW One battery per battery cluster the system reports 0.0.337
NoahX-L261 125 kW / 261 kWh, all-in-one cabinet The battery stack of the cabinet 0.0.339

OSP200K

  • Control: the EMS puts the Sunwoda site EMS in remote mode and writes one active power setpoint for the whole system. A reactive power setpoint is sent when it changes.
  • Measurements: the inverter values are the totals over all inverters of the system, so any number of inverters works. Every battery cluster is found from its readings and becomes a battery device of its own.
  • Incidents: the system, inverter and battery cluster alarms each raise their own incident. Level I and II cluster alarms are warnings, level III is critical. A cabinet emergency stop sends emergency notifications, like every other emergency stop.

NoahX-L261

  • Control: the EMS steers the active power of the cabinet.
  • Remote control: the cabinet only accepts commands when its control source is set to remote. Set to local, it rejects every write and the EMS raises the incident Inverter does not accept remote control.
  • Incidents: a lost link between the cabinet controller and its inverter raises PCS communication lost, an inverter in fault raises Power conversion system (PCS) fault.

With the current cabinet firmware, the NoahX-L261 has three limits:

  • No reactive power: the cabinet does not pass a reactive power setpoint on to its inverter, so the EMS does not steer reactive power on it.
  • No fallback on a lost connection: when the connection with the EMS drops, the cabinet keeps its last setpoint.
  • Slow start from stop: after about 2 minutes at 0 kW the inverter goes from standby to stop. The next setpoint then takes about a minute before power flows.

Setup

  1. Network

    Connect the Sunwoda system to the same network as the Voltmasters Controller and give it a fixed IP address. On a NoahX-L261, set the control source of the cabinet to remote.

  2. Add the system in the platform

    Add a device of type Battery system (PCS), with brand Sunwoda and model OSP200K or NoahX-L261. Fill in the IP address and port, and check the prefilled Slave ID 1. The rated power is prefilled with 200 kW for the OSP200K and 125 kW for the NoahX-L261.

    The battery of the system is proposed as a linked battery device: one per battery cluster on the OSP200K, the battery stack on the NoahX-L261. Keep it selected and save.

  3. Verify

    Check on the device page that the state of charge and the power come in, and that the system follows a setpoint.