SMA SUNNY BOY Solar Inverters

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 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 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 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 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'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.

You are unable to change grid parameters due to a protection mechanism or insufficient DC voltage. The main CPU requires a minimum DC voltage to operate and allow parameter changes.

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 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.

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 inverter display shows a generic 'Error' message, indicating that an event has occurred. Further details like event type, number, date, and time should also be available.

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

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 lack of solar power, grid disconnection, or a fault.

The inverter is feeding power into the grid, and the pulsing speed of the green LED dynamically reflects the current power output. Faster pulsing means higher power output, slower pulsing means lower output.

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.

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.

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.