SMA Solar Technology SUNNY BOY 3.0, Operating Manual, Page: 16 / 100

All-pole sensitive residual-current monitoring unit
The all-pole sensitive residual-current monitoring unit detects alternating and direct differential
currents. In single-phase and three-phase inverters, the integrated differential current sensor detects
the current difference between the neutral conductor and the line conductor(s). If the current
difference increases suddenly, the inverter disconnects from the utility grid.
SMA Smart Connected
SMA Smart Connected is the free monitoring of the inverter via the SMA Sunny Portal. Thanks to
SMA Smart Connected, the PV system operator and qualified person will be informed automatically
and proactively about inverter events that occur.
SMA Smart Connected is activated during registration in Sunny Portal. In order to use SMA Smart
Connected, it is necessary that the inverter is permanently connected to Sunny Portal and the data
of the PV system operator and qualified person is stored in Sunny Portal and up-to-date.
4.3 LED Signals
The LEDs indicate the operating state of the inverter.
LED Status Explanation
Green LED flashing: 2 s on
2 s off Waiting for connection conditions
The conditions for feed-in operation are not yet met. As
soon as the conditions are met, the inverter will start feed-
in operation.
flashing quickly Update of central processing unit
The central processing unit of the inverter is being up-
dated.
glowing Feed-in operation
The inverter feeds in with a power of at least 90%.
pulsing Feed-in operation
The inverter is equipped with a dynamic power display via
the green LED. Depending on the power, the green LED
pulses fast or slow. If necessary, you can switch off the dy-
namic power display via the green LED.
Off The inverter is not feeding into the utility grid.
Red LED glowing Event occurred
If an event occurs, a distinct event message and the corre-
sponding event number will be displayed in addition on
the inverter user interface or in the communication prod-
uct.
4 Product Description SMA Solar Technology AG
Operating Manual SB30-50-1AV-40-BE-en-10 16