Powerwall 3 Wall Bracket Anchoring Details for Wall-mounting or Ground-mounting on Approved Foundation

Reference these anchoring details when mounting Powerwall 3 to the provided mounting bracket.

Note

For any of the following mounting configurations:

Maximum washer outer diameter is 27.5 mm
Maximum fastener head height is 12 mm
Maximum fastener shaft diameter is 10 mm


Wood Studs (spaced at 12 to 17 inches) If anchoring directly into wood studs, use at least four (one in each corner) #14 (approx. ¼ inch dia.) wood screws with washers, of sufficient length for at least 2-½ inch embedment into the studs. Note See Channel Strut (Unistrut) (A7) for stud spacing greater than 17 inches, up to 24 inches.
Metal Studs (spaced at 12 to 17 inches) If anchoring directly to metal studs, studs must be minimum 18 gauge or 43 mil thickness (0.043 in). Use at least four (one in each corner) ¼ inch or #14 sheet metal screws with washers, of sufficient length to penetrate at least 3 threads beyond the stud. Note See Channel Strut (Unistrut) (A7) for stud spacing greater than 17 inches, up to 24 inches.

A8 - Powerwall 3 Wall Bracket Anchoring Details for Wall-mounting or Ground-mounting on Approved Foundation


Concrete Masonry Unit Wall Minimum strength must be 2000 PSI. Use at least four (one in each corner, in any available anchor slot) 3/8 inch concrete anchors of sufficient length for the embedment listed below. ESR 1056 for Simpson Titen HD 3/8-inch concrete anchor. Minimum 2-¾ inch (70 mm) embedment required ESR 3056 for Hilti KH-EZ 3/8-inch concrete anchor (for fully grouted CMU cells only). Minimum 1-5/8 inch (41.3 mm) embedment required Anchors shall not be installed within 12 inches (305 mm) of wall edges or 1-½ inches (38 mm) of masonry block edges. Note Fasteners shall not be installed in mortar joints.
Solid Concrete Wall Minimum strength must be 2500 PSI. Use at least four (one in each corner, in any available anchor slot) 3/8 inch concrete anchors of sufficient length for at least 2-½ inch embedment into the wall. ESR 2713 for Simpson Titen HD 3/8-inch concrete anchor ESR 3027 for Hilti KH-EZ 3/8-inch concrete anchor
Brick Wall (Double and Single Layer of Brick Masonry) Minimum strength must be 2500 PSI. Use at least four (one in each corner, in any available anchor slot) ¼ inch masonry anchors of sufficient length for the embedment listed below. Kwik Conn 2 (No ESR). Minimum 1-¾ inch (44.5 mm) embedment required Note Brick depth must be verified to be nominal 4" thick prior to mounting. Brick thickness of 3-5/8" or less is not permitted for brick-only attachments and other wall type attachments need to be investigated. Note Fasteners shall not be installed in mortar joints.

A9 - Powerwall 3 Wall Bracket Anchoring Details for Wall-mounting or Ground-mounting on Approved Foundation


Channel Strut (Unistrut) Struts must be minimum 12 gauge and 1-5/8 inch. Note The horizontal strut must be attached to all vertical studs within in the span. When mounting to wood, metal studs, concrete and CMU, use the fastener requirements noted in the applicable sections above. Channel strut shall have a maximum unsupported span of 24 inches (610 mm). For wood or metal studs, one fastener is required to attach the horizontal strut at each intersection of the vertical framing members of the wall (e.g. if a strut crosses 3 stud members, 3 fasteners are required). For CMU walls, connect strut with 3 concrete anchors at 10 inches minimum. To attach the bracket to the struts, use at least four (one in each corner) 3/8 inch hex head screws with washers and strut nuts.