4 Product Description SMA Solar Technology AG
12 SB13_21TL-IA-en-65 Installation Manual
4 Product Description
4.1 Sunny Boy
The Sunny Boy is a transformerless PV inverter, which converts the direct current of the PV array to
grid-compliant alternating current and feeds it into the electricity grid.
Figure2: Components of the Sunny Boy
Icons on the Inverter
Item Description
A Type label
BLEDs
CESS*
*optional
D Display
EEnclosure lid
Icon Explanation
Inverter
This icon is located next to the green LED which indicates feed-in operation
of the inverter.
Earth fault or varistor defective
This icon is located next to the red LED which indicates an earth fault or a
defective varistor (see Section10.5 "Red LED Permanently On", page54).