SMA SUNNY BOY 5000-US - Commissioning and Operation; Power-Up Sequence and Startup Issues

Electrical Connection SMA America, LLC
60 SB50US-80US-eng-IUS112633 Installation Guide
3. Insert the screw and conical spring washer of the SMA DC Disconnect into the underside.
Tighten the screw with a torque of 44 in-lbs. (5 Nm).
The toothing of the conical spring washer must point toward the cover for the SMA DC
Disconnect to be grounded.