Position
Designation
F
DC load-break switch
The inverter is equipped with a DC load-break switch. If the DC load-
break switch is set to the position
I
, it establishes a conductive connection
between the PV array and the inverter. Setting the DC load-break switch
to the
O
position interrupts the DC electric circuit and completely discon-
nects the PV array from the inverter. Disconnection takes place at all
poles.
G
Lower enclosure lid
H
Upper enclosure lid
Symbols on the Inverter and on the Type Label
Symbol
Explanation
Inverter
Together with the green LED, this symbol indicates the operating state of
the inverter.
Observe the documentation.
Together with the red LED, this symbol indicates an error (for trou-
bleshooting, see the service manual at www.SMA-Solar.com).
Data transmission
Danger
This symbol indicates that the inverter must be additionally grounded if a
second grounding conductor or equipotential bonding is required lo-
cally .
QR Code
Links to additional information on the inverter can be found at
www.SMA-Solar.com.
Danger to life due to electric shock
The product operates at high voltages. All work on the product must be
carried out by qualified persons only.
Risk of burns due to hot surfaces
The product can get hot during operation. Avoid contact during opera-
tion. Allow the product to cool down sufficiently before carrying out any
work.
4 Product Description
SMA Solar Technology AG
Operating Manual
STP20-25TL-BE-en-11
12