SMA STP 15000TL Installation - Manual (Page 59)

SMA Solar Technology AG Disconnecting the Inverter from Voltage Sources
Installation Manual STP20TLHE-IA-IEN122222 59
6. Loosen all six captive screws of the enclosure lid.
7. Lift and remove the enclosure lid from below.
8. Ensure that L1, L2 and L3 are disconnected from
voltage sources to N. For this purpose, use a test
probe with a maximum diameter of 2 mm.