Inverter with battery: no communication

What does 404 mean?

The Fronius Primo GEN24 208-240 inverter, configured to operate with a battery, has lost communication with the battery system. This prevents any battery charging or discharging, effectively disabling the energy storage function.

• No communication with the battery.
• Wiring fault (e.g. incorrect or loose cable, crossed data lines).
• Battery not powered.
• Incorrect battery address or settings.
• Battery system internal fault.

Click steps to track your progress.

1. 1

   Check all communication cables (e.g., CAN bus, RS485) between the Fronius Primo GEN24 208-240 inverter and the battery management system (BMS) for proper connection and integrity.

2. 2

   Confirm that the battery system is powered on, not in sleep mode, and its status indicators (LEDs) are normal.

3. 3

   Verify the communication protocol settings (e.g., CAN ID, Modbus address) within the inverter's interface align with the battery manufacturer's specifications.

4. 4

   Inspect the communication cable for any physical damage, breaks, or incorrect pinouts.

5. 5

   Perform a controlled shutdown and restart of both the inverter and the battery system as per their respective manuals to reset communication.