FSP-Solar
Interfaces FSP-Solar hybrid inverter via Modbus RTU and P17 Modbus card.
This template provides a Modbus RTU interface for FSP-Solar HybridInverter and Voltronic InfiniSolar devices using the P17 Modbus card. It supports read access to inverter data with a recommended minimum polling interval of 5 seconds to protect the device EEPROM.
- Protocol
- Modbus RTU
- Connection
- RS485
- Registers
- 0, read only
- Brand
- FSP-Solar
- Compatible models
- FSP-Solar HybridInverter · Voltronic InfiniSolar
- Last updated
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Use cases
- Monitor FSP-Solar HybridInverter operating data remotely via a cloud dashboard for distributed site management.
- Track Voltronic InfiniSolar battery and grid status across multiple customer installations from one platform.
- Set up alerts when inverter communication drops or polling data becomes unavailable for more than a defined period.
- Generate periodic reports on inverter uptime and availability for maintenance planning.
- Verify correct inverter operation after commissioning by reviewing live Modbus register values in the cloud.
Installation
Install the P17 Modbus card into the FSP-Solar HybridInverter or Voltronic InfiniSolar unit according to the manufacturer instructions.
Wire the RS-485 connection from the P17 Modbus card to the Modbus RTU port on your ModbusCloud Gateway, observing correct A/B polarity.
Configure the baud rate, parity, and stop bits on the gateway to match the P17 Modbus card default serial settings.
Set the Modbus slave address on the P17 card and ensure the same address is configured in the ModbusCloud template.
Import the FSP-Solar template in the ModbusCloud platform and assign it to the gateway, then set the polling interval to 5 seconds or more.
Verify data flow in the ModbusCloud dashboard by checking that register values update at each polling cycle.
Things to watch for
Why should I avoid writing control commands to the inverter via Modbus?
The manufacturer warns that write commands are immediately stored in the EEPROM. Frequent writes can damage the memory permanently. Use this template primarily for read access.
What is the minimum polling interval I should use?
Set the polling interval to at least 5 seconds. Faster polling can overload the communication interface and is not recommended by the manufacturer.
Do I need additional hardware to enable Modbus on the inverter?
Yes. The P17 Modbus card must be installed in the inverter. Without it, the Modbus RTU interface is not available.
What RS-485 wiring and serial settings are required?
Connect the A and B terminals from the P17 card to the corresponding terminals on the Modbus gateway. Check the P17 card documentation for the default baud rate and parity settings, and configure the gateway to match.
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