SMA SMC 9000TL Installation - Manual (Page 20)

20 SMC9-11TLRP-IA-en-51 Installation Manual
4 Product Description SMA Solar Technology AG
Aufgabe_ESS
The ESS and the DC connectors form a DC load disconnect unit.
There are two types of ESS with different plug designs. The function of the ESS is identical in both
cases.
Funktion_ESS
When plugged in, the ESS forms a conductive path between the PV array and the inverter. Removing
the ESS interrupts the DC electric circuit and removing all DC connectors disconnects the PV array
completely from the inverter.
4.4 Electronic Solar Switch (ESS)
Figure 6: Example of ESS design with visible metal mounting tab
Item Designation Explanation
A Plug Depending on the type of ESS, the metal
mounting tabs in the plug are visible or in a
plastic enclosure.
B Label • If the ESS is plugged in, the DC
electric circuit is closed.
• To interrupt the DC electric circuit,
you must first perform steps 1 and 2
consecutively.
• Remove the ESS.
• Remove all DC connectors.