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Device integrations

Sungrow

Sungrow inverters and the Logger1000B in the Voltmasters EMS: supported series, setting up Modbus TCP, and keeping the inverter online at a 0 kW setpoint.

Our EMS monitors and curtails Sungrow inverters and the Logger1000B data logger over Modbus TCP.

Supported devices

Series Models
RT SG3.0RT (beta), SG4.0RT (beta), SG5.0RT (beta), SG6.0RT (beta), SG7.0RT (beta), SG8.0RT (beta), SG10RT (beta), SG12RT (beta), SG15RT (beta), SG17RT (beta), SG20RT (beta)
KTL-M SG5KTL-MT (beta), SG6KTL-MT (beta), SG8KTL-M (beta), SG10KTL-M (beta), SG10KTL-MT (beta), SG12KTL-M (beta), SG15KTL-M (beta), SG17KTL-M (beta), SG20KTL-M (beta), SG30KTL-M (beta), SG30KTL-M-V31 (beta), SG33KTL-M (beta), SG36KTL-M (beta), SG50KTL-M-20 (beta), SG80KTL-M (beta)
CX SG25CX-SA (beta), SG30CX (beta), SG33CX, SG40CX-P2, SG50CX (beta), SG75CX (beta), SG100CX (beta), SG100CX-JP (beta), SG110CX (beta), SG125CX-P2 (beta), SG36CX-US (beta), SG60CX-US (beta)
KU / KTL SG60KU (beta), SG60KU-M (beta), SG60KTL (beta), G80KTL (beta), SG80KTL-20 (beta)
HV / BF SG80HV (beta), SG80BF (beta), SG85BF (beta), SG110HV-M (beta), SG111HV (beta), SG125HV (beta), SG125HV-20 (beta)
HX / TX SG136TX (beta), SG225HX (beta), SG250HX (beta), SG250HX-IN (beta), SG250HX-US (beta)
Other SG33K3J (beta), SG34KJ (beta), SG49K5J (beta), LP_P34KSG (beta)
Logger1000B Data logger (beta)

The SG33CX and the SG40CX-P2 are fully supported. The other models are beta.

Setup

  1. Open the communication parameters

    On the display of the inverter, go to Settings → Communication Parameters.

  2. Set the protocol and the address

    Set Protocol to MODBUS and give a unique Device Address between 1 and 247.

  3. Enable Modbus TCP

    Turn MODBUS-TCP on, leave the Port at 502, and choose DHCP or a fixed address for the IP Address, depending on your network.

  4. Keep the inverter on at a 0 % limit

    In the parameter list of the inverter, set Uitschakelen bij actiefvermogenslimiet van 0% (shut down at an active power limit of 0 %) to Uitschakelen (disabled). When that parameter is on, the inverter shuts itself down when the EMS asks for 0 kW, for example at negative prices, and stops responding to new setpoints for quite a while.

    The parameter list of a Sungrow inverter, in Dutch, with Uitschakelen bij actiefvermogenslimiet van 0% set to Uitschakelen.

  5. Add the inverter in Voltmasters

    Add the inverter or the Logger1000B with its IP address, port 502 and the Device Address from step 2.

Known issues

The inverter goes offline after a setpoint of 0

Some Sungrow models shut themselves down after the EMS sends a 0 kW setpoint, and then stop responding for quite a while. Set the parameter from step 4 to Uitschakelen. If it still happens after that, contact Voltmasters Support.