Sigenergy SigenStor Slave

Installation

1. 1Enable Modbus TCP on the SigenStor inverter through its local configuration interface or app.
2. 2Connect the ModbusCloud gateway (MCG or MLP series) to the same local network as the SigenStor inverter.
3. 3Note the IP address of the SigenStor inverter and the Modbus unit ID (slave address) assigned to it.
4. 4Import the Sigenergy SigenStor Slave template in the ModbusCloud platform and enter the IP address and unit ID.
5. 5Verify that register values for energy export, active power, and PV power appear correctly on the dashboard.
6. 6If multiple SigenStor slave units exist on site, repeat the template import for each unit with its own unit ID.

Things to watch for

01

I cannot connect to the SigenStor via Modbus TCP. What should I check?

Confirm that Modbus TCP is enabled on the inverter. Check that the gateway and the inverter are on the same network subnet. Verify the correct IP address and that the default Modbus TCP port (502) is not blocked by a firewall.

02

Energy register values seem extremely large. Is this normal?

The energy registers (export, import, battery charge, battery discharge) use uint64 data types spanning four consecutive registers each. Ensure your gateway is reading all four registers and applying the correct byte and word order. A misconfigured word order will produce inflated or nonsensical values.

03

Active Power shows a negative value. Is the template configured correctly?

Active Power is stored as a signed int32 value. A negative reading typically indicates power flowing in the opposite direction, such as export to the grid. This is expected behaviour.

04

Can I use this template to control the battery charge or discharge schedule?

No. This template is read only and does not include any writable registers. Battery management must be configured directly on the SigenStor inverter or through the Sigenergy app.

Registers (6)

6 read / 0 write

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