SMA SB 2500 Installation - Manual (Page 21)

SMA Solar Technology AG Electrical Connection
Installation Manual SB25-30-IA-en-51 21
5.1.2 Interior View
The following figure shows the various components and connection areas of the open inverter.
* If you have ordered the inverter without ESS, the inverter is equipped with 1 negative and 1 positive DC connector.
** Optional
Object Description
A Varistors
B Connection area and slots for optional communication via RS485
C Display
D Operating status LEDs
E Jack for AC connection
F DC connector*
G Jack for the Electronic Solar Switch (ESS)**