SMA Sunny Boy Solar Inverter

The grid voltage or grid impedance at the inverter's connection point is too high, leading to the inverter disconnecting from the utility grid. This action prevents damage to the inverter and helps maintain overall power quality.

There is no valid signal detected on the network line connected to the inverter's interface. This indicates a complete loss of network connectivity, preventing data exchange with other devices.

The network data transfer rate of the inverter's interface has changed, specifically dropping to 10 Mbit. This reduced speed can severely impact communication performance and indicates an underlying issue with the physical connection.

The network duplex mode of the inverter's interface has changed, specifically dropping to Half duplex. This can lead to significant performance degradation due to collisions and retransmissions, pointing to a physical layer problem.

The inverter cannot connect to the utility grid because the configured country data set or the value of a user-set parameter does not comply with local grid requirements. This prevents proper grid synchronization and operation.

The ten-minute average value of the grid voltage is no longer within the permissible range. This fault indicates that the grid voltage or grid impedance at the inverter's connection point is too high. The inverter disconnects from the utility grid to maintain power quality.

There is not enough power at the DC input of the inverter to enable stable operation, consequently preventing the inverter from connecting to the utility grid. This can be due to environmental factors or system design.

An overvoltage condition has occurred at the DC input, which poses a risk of destroying the inverter. This critical message is also signaled by rapid flashing of the LEDs, indicating an immediate need for intervention.

A ground fault is present in the PV system, indicating that the electrical insulation from the PV system to ground is defective or insufficient. This poses a danger of electric shock and can reduce system performance.

The inverter has detected a ground fault in the PV array (3501), or the leakage current of the inverter and PV array is too high (3601), or a residual current due to temporary grounding of the PV array has been detected (3701). These conditions indicate defective or insufficient electrical insulation from the PV system to ground, potentially from a ground fault, residual current, or a malfunction causing high leakage current. The inverter will interrupt feed-in operation.

A ground fault is present in the PV system, indicating that the electrical insulation from the PV system to ground is defective or insufficient. This poses a danger of electric shock and can reduce system performance.

A ground fault is present in the PV system, indicating that the electrical insulation from the PV system to ground is defective or insufficient. This poses a danger of electric shock and can reduce system performance.

An overcurrent condition has occurred at the DC input, causing the inverter to briefly interrupt feed-in operation as a protective measure. Frequent occurrences suggest issues with the PV array's design or wiring.

The necessary feed-in conditions for the utility grid have not yet been fulfilled, preventing the inverter from starting operation. This is often related to environmental conditions or initial setup parameters.

The inverter has disconnected from the utility grid because it detected a stand-alone grid condition or a very large change in the power frequency. This protects the inverter and grid from unstable power conditions.

The inverter has disconnected from the utility grid because a stand-alone grid was detected or a very large, short-term change in the power frequency occurred. This disconnection is a protective measure.

The power frequency is not within the permissible range, causing the inverter to disconnect from the utility grid. Frequent occurrences suggest a persistent issue with grid frequency stability.

The inverter has detected an excessively high proportion of direct current (DC) in the grid current. This can indicate an issue with grid quality or external DC sources influencing the AC grid, potentially harming connected equipment.

The update process for the inverter's user interface has failed. This indicates an issue during the software update of the WebUI component, potentially leaving the interface in an unstable state.

An internal fan fault has been detected within the inverter. This indicates a potential malfunction or failure of the cooling fan, which could lead to overheating and reduced performance or damage if not addressed.

An internal fan fault has been detected within the inverter. This indicates a potential malfunction or failure of the cooling fan, which could lead to overheating and reduced performance or damage if not addressed.

The inverter is not receiving any data from the connected energy meter. This fault indicates a disruption in the communication link between the inverter and the meter, preventing accurate energy monitoring.

The inverter has reduced its power output for more than ten minutes due to excessive internal temperature. This derating is a protective measure to prevent damage from overheating, impacting power generation capacity.