SMA Sunny Boy Series

The inverter detects that the DC voltage from the solar panels is too high. This condition can severely damage the inverter if not addressed immediately.

The inverter has detected that the ten-minute average value of the grid voltage is no longer within the permissible range. This usually indicates that the grid voltage or grid impedance at the connection point is too high, causing the inverter to disconnect from the utility grid to maintain power quality.

The inverter has disconnected from the utility grid because it detected a stand-alone grid or a very large, short-term change in the power frequency. This is a protective measure to ensure grid stability and safety.

The inverter has disconnected from the utility grid because the power frequency is not within the permissible range. This is a protective measure to ensure stable operation and grid quality.

The inverter cannot connect to the utility grid because the configured country data set or a set parameter value does not comply with local requirements. This prevents the inverter from safely operating with the grid.

The inverter is unable to connect to the utility grid due to insufficient power at its DC input. This means the PV array is not supplying enough electricity for stable operation.

The inverter has detected overvoltage at its DC input, which is additionally signaled by rapidly flashing LEDs. This is a critical error as sustained overvoltage can permanently damage the inverter, requiring immediate attention.

The inverter has detected a ground fault (also known as an insulation fault) within the PV array. This means there is an unintended electrical path from the live conductors to the ground, which can be dangerous.

The red LED is glowing and one of these event numbers is displayed, indicating a ground fault in your PV system. This means the electrical insulation from the PV system to ground is defective or insufficient.

The inverter has detected that the leakage current of the inverter and the PV array is too high, often indicating a ground fault, a residual current, or a general malfunction. The inverter will interrupt feed-in operation immediately as a safety measure.

The inverter has detected a high residual current, which is often caused by a temporary grounding of the PV array. This leads to the inverter interrupting its operation to ensure safety and prevent damage.

The inverter has detected an overcurrent at its DC input and briefly interrupts feed-in operation as a protective measure. This indicates that the PV array might be supplying too much current, potentially beyond the inverter's limits.

The inverter is waiting to start feeding into the utility grid, but the necessary DC start conditions are not yet fulfilled. This usually happens if there isn't enough solar irradiation or if the PV array is not producing sufficient voltage to begin operation.

The update of the inverter's user interface (WebUI) software has failed.

There is a fault with the inverter's internal fan or its electronic control.

The inverter is not receiving data from the energy meter it is connected to.

This error indicates an interference device is affecting the inverter's operation. The exact cause must be determined by a service technician.

The inverter has reduced its power output for more than ten minutes due to excessive internal temperature.

There is a general communication disturbance detected by the inverter. The specific cause needs to be investigated by a service technician.

The inverter's self-diagnosis has detected an issue with DC input C, indicating a possible problem with the connected string.

The inverter has lost communication with the system control manager (e.g., Sunny Home Manager) responsible for active power limitation. The inverter will either retain the last received values or limit active power to a pre-set percentage.

The inverter's display is not showing any information. This means you cannot see operating data or fault messages directly on the device.

The SMA Grid Guard code entered to change protected operating parameters is incorrect. As a result, the parameters remain protected and cannot be modified.

Changes to the inverter's grid parameters are currently blocked. To modify these parameters, you must log in using the SMA Grid Guard code.

Grid parameters cannot be changed. This can be due to protected parameters or insufficient DC voltage for the inverter's main processing unit.

The self-test function (specific to Italy) was terminated before completion.

The inverter's communication status with your network switch or router (DHCP server) has changed. An additional error message might be displayed.

There is no valid network signal on the connection line to the inverter.

The network data transfer rate has dropped to 10 Mbit/s, which is slower than optimal. This can indicate a problem with the network cable or connection.

The network data transfer mode (duplex mode) has changed to 'Half', meaning data cannot be sent and received simultaneously. This is typically less efficient.

The Arc-Fault Circuit Interrupter (AFCI) has detected 5 electrical arcs within a 24-hour period. For safety, the inverter has permanently stopped feeding power into the grid.

All three LEDs (Green, Red, Blue) glowing solidly at the same time indicates that the inverter is either performing a software update or is going through its initial booting sequence.

The inverter is in standby mode, typically due to insufficient input voltage for operation, such as during the night. If this occurs during a sunny day with good solar irradiation, it indicates a problem with the PV voltage.

The inverter is currently initializing. The power from the solar array is sufficient to start control functions, but not yet enough for normal operation. Data transmission is not possible during this phase. This can also happen briefly during inclement weather or low irradiation when the inverter attempts to initialize.

The Sunny Boy inverter has either disconnected from the grid or is limiting its output to 6 kW (adjustable) over a 10-minute average. This occurs in a three-phase system with other Sunny Boys and an SMA Power Balancer, specifically to prevent unbalanced loads when another inverter detects a fault or grid issue.

The internal communication between the Sunny Boy's micro-controllers has failed. This is identified as a disturbance message.

A rapid blue LED flash indicates that a System Manager in your setup is requesting the inverter to identify itself. This is part of the normal communication protocol within the system.

The blue LED flashes rapidly for approximately two minutes when the WPS function is enabled on the inverter. This indicates that the WPS function is active and ready to connect to a network or an end device.

The Wi-Fi Protected Setup (WPS) function on the inverter is active, allowing for easy connection to a compatible Wi-Fi device.

The inverter is trying to establish a connection. This could be with a local network (LAN/WLAN) or directly with an end device like a computer, tablet, or smartphone via Ethernet.

The inverter is in the process of establishing a network connection to a local network or a direct connection to a device like a computer, tablet, or smartphone via Ethernet.

A solid blue LED indicates an active communication connection. This means the inverter is successfully connected to a local network or directly to an end device (computer, tablet, smartphone) via Ethernet.

The blue LED being off indicates that there is no active communication connection. The inverter is not currently linked to a local network or a smart device.

The blue LED flashes slowly for approximately 2 minutes, indicating that the WPS (Wi-Fi Protected Setup) function is currently active on the inverter. This allows for an automatic connection to a network or a direct connection to a smart device.

A solid blue LED signifies that the inverter has a stable and active communication connection. This means it's successfully connected to a local network or has a direct link with a smart device.

An internal communication issue has been detected within the inverter system. This indicates a problem with the inverter's internal components communicating correctly, which can affect its operation.

This message indicates that the Live (L) and Neutral (N) wires on the AC connection are incorrectly swapped, or the Protective Earth (PE) connection is missing. This is a critical safety and operational fault.

The inverter's internal hardware monitoring system has detected a fault within its power electronics. This indicates a hardware malfunction inside the device that prevents normal operation.

The inverter is reducing its power output because its internal temperature is too high. This is a protective measure designed to prevent overheating and potential damage to the device.

The inverter is reducing its power output to prevent internal components from overheating. This is a safety measure to maintain safe operating temperatures.

The inverter has detected a significant change in the differential current. This fault typically occurs in transformerless inverters and is crucial for personal safety, often indicating a sudden grounding fault, residual current, or an internal device fault. The inverter will disconnect from the grid.

The inverter has detected a deviation in its differential current measurement. If this fault appears repeatedly, it indicates that inverter operation is permanently disabled due to a persistent measurement issue.

A 'Disturbance' error has occurred for safety reasons, preventing the Sunny Boy inverter from connecting to the grid. This is a general safety-related fault.

The inverter has detected that the earth current between the PV positive terminal and ground is outside the acceptable limits. This indicates a ground fault within the PV system.

The SMA Sunny Boy inverter has detected a ground fault in the PV array. This means the current between PV+ and ground is outside the acceptable range. This message appears on the display, and the GFDI fuse may have cleared.

The inverter experienced a failure while reading or writing data to the EEPROM. This data is not critical for safe operation, and the inverter's performance is not affected. This is a disturbance message.

The data EEPROM is defective, which affects important inverter functions. Due to this critical data loss, the device has been permanently disabled.

One of the duplicate data sets in the EEPROM was found defective but has been successfully reconstructed without any data loss. This message is for information purposes only and does not affect the inverter's performance.

A general 'Error' message indicates that the inverter has detected an unspecified internal fault. This prevents normal operation.

The inverter displays a grid connection error, indicating it is waiting for grid voltage or there is an installation failure. This typically means either the Live (L) or Neutral (N) conductor is not connected, or the utility grid itself has failed.

The inverter cannot connect to the utility grid because the configured country standard or a specific parameter value does not match the local requirements. This prevents the inverter from operating correctly with the grid.

The inverter is experiencing unstable operation and cannot connect to the utility grid. This is typically due to insufficient power being supplied at the DC input of the inverter.

A solid red LED along with event numbers 3501, 3601, or 3701 on the user interface indicates a ground fault in your PV system. This means the electrical insulation from the PV system to the ground is either defective or insufficient, posing a significant safety risk.

The inverter has detected that the effective value of the grid voltage has exceeded the allowed voltage thresholds for a specific duration. This indicates an overvoltage condition originating from the utility grid.

The inverter has detected an internal device fault during its self-diagnosis routine. The precise cause of this fault requires further investigation by a service professional.

The inverter has detected an internal device fault during its self-diagnosis routine. The precise cause of this fault requires further investigation by a service professional.

The inverter has detected an error specifically at its DC input A. This indicates a problem with the photovoltaic string connected to input A or with the inverter's internal input circuitry for that channel.

The inverter has detected an error specifically at its DC input B. This indicates a problem with the photovoltaic string connected to input B or with the inverter's internal input circuitry for that channel.

A temperature sensor located inside the inverter is defective. To prevent potential damage from overheating, the inverter has interrupted its feed-in operation.

A temperature sensor located inside the inverter is defective. To prevent potential damage from overheating, the inverter has interrupted its feed-in operation.

A temperature sensor for the boost converter within the inverter is faulty. This fault causes the inverter's cooling fan to run continuously, indicating an internal sensor issue.

A temperature sensor located inside the inverter is defective. To prevent potential damage from overheating, the inverter has interrupted its feed-in operation.

The inverter has detected an internal interference or malfunction during its self-diagnosis. The exact cause of this internal device interference needs to be determined by a service professional.

The inverter has detected an internal interference or malfunction during its self-diagnosis. The exact cause of this internal device interference needs to be determined by a service professional.

The grid frequency is no longer within the allowed range. The Sunny Boy inverter assumes the public grid is down and disconnects to prevent 'islanding' (where the inverter continues to power a local grid section independently).

The frequency of the AC grid is outside the acceptable operating range. The Sunny Boy assumes the public grid is down and disconnects from the grid to prevent 'islanding'. This is a disturbance message.

The Ground Fault Detection Interruption (GFDI) fuse inside the Sunny Boy is open or has cleared (blown). This fuse is crucial for protecting the PV system in the event of a ground fault. This is a warning message.

The inverter's operation is halted because a country data set has not been configured. This is a common occurrence during the initial commissioning process. The inverter will begin operation once the configuration is complete.

The inverter has sufficient PV power to calibrate its internal systems but not enough to begin normal operation yet. Calibration typically lasts less than 10 seconds. This status also appears if the inverter has been manually set to STOP mode.

The inverter has sufficient voltage from the PV array but is currently checking the condition of the utility grid before connecting. This is a normal startup phase.

The inverter is currently operating in backup mode, which means it is likely drawing power from a connected battery or maintaining a local power supply, often during a grid outage.

The inverter's main central processing unit is currently undergoing a software update. During this time, the inverter may not operate normally.

This LED pattern indicates that the inverter is actively providing power to the secure power supply outlet. This operation is enabled, and the inverter is supplying current from the PV system.

The inverter is ready but the conditions required for feeding power into the grid are not yet met. Once conditions are favorable, the inverter will automatically start feeding power.

The inverter's main internal software (central processing unit) is currently being updated. This is a normal process.

The inverter is actively feeding power into the utility grid, operating at 90% or more of its capacity. This indicates normal operation.

The inverter is momentarily reducing its power output, indicated by the green LED going out briefly, to manage its internal temperature and prevent overheating. This is a protective measure.

The PV system's output is too low if the green LED does not flash, and no message that the secure power supply operation mode is enabled appears on the display, or the control lamp of the outlet does not glow. This usually means solar irradiation is insufficient or the connected load requires more power than currently available.

The inverter is not actively feeding any power into the utility grid. This could be due to various reasons, from lack of sun to an error.

The inverter is actively feeding power into the utility grid, and the pulsing pattern of the green LED indicates its dynamic power output. A faster pulse usually means higher power.

The inverter is currently waiting for the necessary conditions to be met before it can start feeding power into the grid. These conditions often include sufficient sunlight for power generation or stable grid conditions.

A solid green LED indicates that the inverter is functioning normally and is actively feeding power into the grid. This means your PV system is generating electricity successfully.

The Sunny Boy could not detect the type of AC grid it is connected to (e.g., 208V, 240V, or 277V). This is a disturbance message.

A ground fault has been detected within the PV system. This can be identified by specific voltage measurements within the PV array, where the sum of positive to ground and negative to ground voltages approximately equals the total string voltage.

The SMA SUNNY BOY SB30-50-1AV-40 Inverter displays a message indicating a ground fault within the photovoltaic system. This means there is an unintended electrical connection between a live part of the PV system and the ground, which needs to be identified and resolved for safe and optimal operation.

An internal measurement fault or a hardware defect has been detected within the inverter. This indicates a problem with the inverter's internal components, which can affect its functionality.

The DC component of the electricity being fed into the grid has exceeded the permissible range. For safety reasons, the inverter will disconnect itself from the grid to prevent issues with the public grid.

The inverter's internal hardware monitoring system has detected a fault in its power electronics, specifically within the IGBT components. This indicates a hardware malfunction that prevents proper inverter operation.

The current flowing to the AC grid has exceeded the specified limits. This is a disturbance message, and it may happen in case of harmful interference on the grid.

An internal test of the K1 relay within the Sunny Boy has failed. This is identified as a disturbance message.

An internal measurement comparison fault or a hardware defect has been detected within the inverter. These messages indicate a problem with the inverter's ability to accurately measure and process data internally, which impacts performance.

The internal measured values from the BFR and SRR redundant processor control systems are too different from each other, indicating a measurement error within the inverter. This is a disturbance message.

The self-test for the grid monitoring system within the Sunny Boy has failed. This is identified as a disturbance message.

This message indicates that the Sunny Boy inverter, part of a three-phase system with other inverters and an SMA Power Balancer, is experiencing an unbalanced load condition. This usually happens when the 'PhaseGuard' or 'FaultGuard' operating parameter is active to prevent grid imbalances.

Both the Red and Yellow LEDs are illuminated, indicating that the inverter has detected a ground fault in the PV system and has disconnected from the grid. The inverter will not restart automatically until the ground fault is located and fixed.

When both the red and yellow LEDs are lit simultaneously, it signifies that the inverter has detected a ground fault within the PV system. The inverter will not restart automatically until the fault is resolved and the inverter is manually reset.

The Red LED on the Sunny Boy inverter is continuously on, indicating that a ground fault has been detected. This signal takes precedence over other LED states (green or yellow). The inverter will not operate until the fault is corrected.

This LED pattern indicates a warning: communication with the System Manager has failed. The inverter continues to operate but with restricted functions, possibly using a fallback power level. A specific event message should also appear on the user interface.

A red LED glowing steadily indicates that an event or error has occurred with the inverter. More details about the event, including type, number, date, and time, will be shown on the inverter's display.

A continuously lit red LED indicates that the Ground Fault Detection Interruption (GFDI) fuse inside the Sunny Boy has either cleared (blown) or is not present. This typically happens due to a ground fault in the PV array.

The SMA SUNNY BOY SB30-50-1AV-40 Inverter is operating at a reduced power level because its internal temperature is too high. This is a protective measure to prevent damage to the unit. Power output will increase once the inverter cools down.

The inverter checks the internal relays that connect it to the grid before starting to feed power. If these relays fail to close properly, the inverter will not connect to the grid for safety reasons and will display this message.

The inverter checks the internal relays that connect it to the grid. If these relays fail to open properly, the inverter will not connect to the grid for safety reasons and will display this message.

The electrical insulation of the PV system from ground is faulty. This means the resistance between the DC plus and/or DC minus connection and ground is outside the safe operating limits, indicating a potential ground fault.

The inverter's internal insulation measurement process has failed to complete successfully. This may indicate an issue with the measurement system itself or an underlying insulation problem in the PV array.

The firmware (internal software) of the inverter is faulty. This is a critical internal error that prevents proper operation of the device.

The inverter has detected an insulation fault on the DC side of the system. This indicates a problem with the electrical isolation of the solar panel wiring or connections, which is a safety concern.

The inverter has detected an overcurrent on the AC side of the connection. For safety reasons, it will disconnect from the grid and then attempt to reconnect. Repeated occurrences suggest a persistent issue.

The inverter has detected a fault in its internal power electronics. It will disconnect from the grid and then attempt to reconnect. This indicates a hardware issue within the inverter that needs professional attention.

The Sunny Boy has detected a continuous internal overcurrent condition and has shut down to prevent damage. This is identified as a disturbance message.

A temporary fault has caused the inverter to shut down. This is a general error message indicating an issue that may be transient or require further investigation by a technician.

The inverter is in secure power supply (SPS) mode, but the load connected to the SPS outlet is drawing too much power. This will cause a brief interruption of the voltage supply.

The voltage of the AC grid is outside the acceptable operating range for the Sunny Boy. The inverter assumes the public grid is down and disconnects to prevent 'islanding'. This is a disturbance message.

The voltage measured on a specific AC leg (L1 or L2) is either too high or too low, exceeding the allowable range for the Sunny Boy. This is identified as a disturbance message.

The DC input voltage from the PV array has exceeded the maximum tolerable value for the SMA Sunny Boy inverter. This is a critical disturbance message, and immediate action is required.

The inverter displays 'Waiting' when the voltage from the PV (photovoltaic) array is not sufficient to begin operation. This is common during low light conditions.

The SMA Sunny Boy is in 'Waiting' mode, and the green LED is blinking. This indicates that either the PV voltage from the solar array is currently too low to begin normal operation, or an AC fault was detected, causing a 5-minute delay before restarting.

A 'Warning' message indicates that the system has detected a condition that requires further investigation. While not a critical error, it suggests potential issues or inefficiencies.

The internal watchdog timer for operation control has been triggered, indicating a potential software or system lock-up within the inverter. This is identified as a disturbance message.

The inverter's internal transformer is configured for or connected to an incorrect type of grid. This is identified as a disturbance message.

The internal transformer has reached a dangerously high temperature, causing the Sunny Boy to stop operating. The fans will automatically run at maximum speed to cool it down. This is identified as a disturbance message.

This message indicates that the transformer temperature was previously high but has now returned to a safe level, allowing the Sunny Boy to resume operation. This is a warning message.

The inverter has detected that the DC input voltage from the PV array is too high for safe operation. This condition can lead to damage to the inverter.

The inverter has encountered an internal fault that prevents it from operating normally. This type of fault typically requires professional servicing.

The yellow fault LED lights up for 5 seconds, then blinks 6 times consecutively, after a 3-second off period. This pattern repeats 3 times. This indicates the discharge current from the inverter and PV generator is too high, causing the Sunny Boy to interrupt grid feeding. It will attempt to reconnect after testing. This fault specifically applies to transformerless inverters.

The inverter has detected a sudden change in differential current (IDN > 30 mA) and has disconnected from the grid for safety. This specific fault can only occur in transformerless inverters.

The inverter has detected a problem with the utility grid, such as voltage or frequency being outside acceptable limits, or rapid changes in these parameters. The inverter will not connect to the grid under these conditions for safety.

The Sunny Boy inverter has detected that the DC input voltage from your solar panels is too high. This condition can be dangerous and may cause permanent damage to the inverter if not addressed. The LED pattern repeats multiple times.

The yellow LED is continuously lit, specifically indicating a 'Control System Fault' within the Sunny Boy's internal monitoring systems. When this occurs, the inverter will no longer connect to the utility grid.

A continuously lit yellow LED indicates that the SMA Sunny Boy has detected a general fault either within its internal systems or somewhere in the connected PV (photovoltaic) system. The inverter will not operate until this fault is corrected.

This specific blinking pattern of the yellow LED indicates a grid fault condition. The pattern repeats as long as the grid fault persists, meaning the inverter cannot connect to the utility grid.