Step 4: Join the Powerwall Units

Orient the second Powerwall about 2 cm (1 in) in front of the first, with its back cable entry port facing the hole you drilled in the front of the first Powerwall.

(Concealed wiring installations only) Do the following to bridge the gap between the Powerwall wiring compartments:

Locate the bridge piece, conduit nipple, two O-rings, and two insulation bushings.
Assemble the conduit nipple, bridge piece and O-rings. Center the bridge and O-rings on the nipple.

Note

Orient the O-rings so that the sides with greater surface area (marked “Box Side”) point to the outside, toward the Powerwall chassis.

Install the assembly between the two Powerwalls so it spans the two wiring compartments.
Thread an insulation bushing onto each end of the conduit nipple, but do not fully tighten the bushings.

(All installations) Locate a side clip, making sure the flange (with magnet) is positioned at the top and that the cams are rotated vertically in relation to the clip.

Slide the side clip into the gap between the two Powerwalls so that its flanges engage the side hem of each enclosure.

Note

The Powerwall enclosure hems have cutouts that mate with tabs in the clip.

Press the clip until it is flush with the sides of the Powerwalls.

Using the provided 6 mm Allen hex wrench, do the following:

Turn the top cam 90 degrees clockwise until it clicks into place and stops rotating.
Turn the bottom cam toward the wall (toward the first Powerwall) so that the cam indicator notch on the hex camshaft head points toward the wall, until the cam clicks into place.

Note

The top cam is symmetrical and can be rotated in either direction to secure the side clip. The bottom cam must be rotated toward the first Powerwall so that its stepped side (indicated by the notch on the hex camshaft head) engages the housing of one of the Powerwalls.

Repeat steps 3-6 to install a side clip on the other side of the Powerwalls.

Note

If necessary, use a small rubber mallet or a hammer and wood block to gently tap the side clips so that they are fully seated in the hem of the Powerwall.

Position the top cover across the gap between the Powerwalls so that its flanges engage the tops of each side clip. The cover is held in place by the magnets on the tops of the side clips.

(Concealed wiring installations only) Tighten the insulation bushing on each side of the conduit nipple to secure the bridge between the two Powerwall wiring compartments.

Use shims to ensure that the Powerwalls are level.

Note

When joined, the units should be level within +/– 2 degrees side-to-side and within +/– 5 degrees front-to-back.