3 Product Description SMA Solar Technology AG
18 SB30-50TL-21-IA-en-21 Installation Manual
PV array This symbol represents a PV array with strings
connected to two inputs on the inverter. The left
half of the symbol stands for input A and the right
half for input B. Whichever half is darker
indicates the input to which the current values
refer. The display switches between the inputs
every 10 seconds.
Inverter ‒
Grid relay If the grid relay is closed, the inverter feeds
power into the grid. If the grid relay is open, the
inverter is disconnected from the grid.
Electricity grid ‒
Symbol Designation Explanation
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