SMA ESS - Manual (Page 12)

Inspection SMA Technologie AG
12 ESS-BEN074812 User manual
5 Inspection
Check the Electronic Solar Switch for wear before plugging it in.
Check if the metal tongues inside the plug show brown discolorations.
The Electronic Solar Switch can no longer safely disconnect the DC side if one of the
metal tongues is completely worn out (see figure below). Replacements for damaged
Electronic Solar Switch handles are available from SMA.
Metal tongues
worn-out metal tongues