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SMA•Sunny Boy Storage

Analysis by Marcus & Team

SMA Sunny Boy Storage Invalid Device Combination Error

Troubleshoot an SMA Sunny Boy Storage system reporting 'Invalid Device Combination' error. Diagnose and resolve communication or compatibility issues with your ESS.

Frequently Asked Questions

•What is the required DC input voltage range for the SMA Sunny Boy Storage inverter?

Refer to the SMA Sunny Boy Storage datasheet for the specific DC input voltage range.

•How do I update the firmware on the SMA Sunny Boy Storage inverter?

Use the SMA Sunny Portal or Sunny Explorer software to update the firmware.

•Where can I find a list of compatible batteries for the SMA Sunny Boy Storage inverter?

Check the SMA website or product manual for a list of approved battery vendors.

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Marcus leads the technical research department at Storage Faults. Together with a team of systems analysts, he specializes in translating complex solar storage error codes into actionable diagnostic steps for the US market.

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Pro Tip:

Access the SMA Sunny Boy Storage inverter's event log through the Sunny Portal or Sunny Explorer. This log provides detailed information about the 'Invalid Device Combination' error, including timestamps and specific error codes, which can aid in pinpointing the root cause.

Safety Warning:

High DC voltage is present in the battery system. Always disconnect the DC disconnect switch before performing any maintenance or troubleshooting. Never work on live circuits. Arc flash hazard exists. Ensure proper PPE (Personal Protective Equipment) is worn. Consult NEC Article 690 and 706 for safety requirements. A qualified electrician is required for all electrical work.

Recommended Action:

1

Verify battery compatibility with the SMA Sunny Boy Storage inverter on the SMA website or product manual. Check the approved battery vendor list.
2

Inspect all communication cables (CAN bus, Modbus) between the inverter and the battery for damage and proper connection. Use a multimeter to verify continuity and absence of shorts.
3

Confirm correct communication settings (CAN bus address, baud rate) are configured on both the inverter and battery BMS. Refer to the system manuals for both devices.
4

Update the firmware on the SMA Sunny Boy Storage inverter to the latest version using the SMA Sunny Portal or Sunny Explorer software. Check the battery manufacturer’s website for any BMS firmware updates.
5

Measure the battery voltage using a calibrated multimeter. Ensure it is within the operating voltage range specified by the SMA Sunny Boy Storage inverter.
6

If the error persists, contact SMA technical support for assistance with advanced troubleshooting. Provide the inverter serial number, battery model, and firmware versions.
7

As per NEC 706.15, ensure battery disconnect is readily accessible and clearly labeled.

How It Works:

The SMA Sunny Boy Storage inverter requires compatible battery systems for proper operation. Communication protocols (CAN bus, Modbus) must be correctly configured. The inverter's firmware must support the connected battery model. Mismatched voltage or current ratings between the inverter and battery can trigger this error. The BMS (Battery Management System) handles critical data such as cell voltage, temperature, SOC, and SOH, and reports it to the inverter. Incorrect BMS parameters or faulty communication leads to error.

Possible Causes:

Incompatible battery model (EverVolt) not supported by the SMA Sunny Boy Storage firmware.
Incorrect communication settings (CAN bus address, baud rate) between the inverter and the battery BMS.
Damaged or improperly wired communication cables between the inverter and the battery.
Firmware incompatibility between the inverter and battery. Outdated inverter or BMS firmware.
Battery BMS failure, preventing proper communication with the inverter.
Voltage or current rating mismatch between the inverter and the battery.

Observed Symptoms:

The SMA Sunny Boy Storage inverter displays an 'Invalid Device Combination' error message. The system may fail to operate, and the battery may not charge or discharge. System monitoring app may show communication errors.

Maintenance Tips:

Regularly check the SMA website and battery manufacturer's website for firmware updates and compatibility information.
Perform periodic visual inspections of all cables and connections.
Monitor battery performance and communication status through the SMA Sunny Portal or Sunny Explorer software.
Schedule annual system inspections by a qualified solar technician.