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) for stud spacing greater than 17 inches, up to 24 inches. Warning See Powerwall 3 Wall Bracket Anchoring Details for Stacked Configurations for site-specific design criteria.
Wood Studs with Blocking (spaced at 24" max) If adding blocking between wood studs, use minimum 2 x 4 in blocks, end-nailed into studs with two 16d (89 x 4 mm) nails or toe-nailed into studs with four 8d (64 x 3 mm) nails. 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 blocking.

A4 - Powerwall 3 Wall Bracket Anchoring Details for Wall-mounting or Ground-mounting on Approved Foundation


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) for stud spacing greater than 17 inches, up to 24 inches. Note Equipment stacks REQUIRE 3 METAL STUDS. Stacks are limited to (2) units per stack up to SDC E. Channel Strut (Unistrut) is required when attaching to more than 2 studs.
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

Note

When anchoring the bracket to concrete, install the fasteners on the outer edges of the bracket slots for greater stability. See Channel Strut for an example diagram.

A5 - Powerwall 3 Wall Bracket Anchoring Details for Wall-mounting or Ground-mounting on Approved Foundation

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

Brick installation is only permitted in seismic design category A or B, and where ESR anchors are not required. Ground mount only.


Maximum Wind Speed	Mounting Location
145 mph	Within 10 ft (3048 mm) of wall edge
165 mph	Not within 10 ft (3048 mm) of wall edge

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.

Note

When anchoring the bracket to brick, install the fasteners on the outer edges of the bracket slots for greater stability. See Channel Strut for an example diagram.

A6 - 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. Warning The horizontal strut must be attached to all vertical studs within in the span. 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. Channel strut shall have a maximum unsupported span of 24 inches (610 mm) and shall not be cantilevered. Warning See Powerwall 3 Wall Bracket Anchoring Details for Stacked Configurations for design-specific limitations of Powerwall 3 bracket to multiple studs. Note When anchoring the bracket to channel strut, install the fasteners on the outer edges of the bracket slots for greater stability, as shown below.

Note

When mounting to wood or metal studs, use the fastener requirements noted in the applicable sections above. 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).

Note

Struts are not allowed to have excessive cantilevers beyond the final fastener. The strut shall extend a maximum of 2 inches +/- 1 inch beyond the fastener.