Expansion units offer additional storage
for Powerwall 3 systems. Key points about Expansion units include:
Function: An Expansion unit does not include
an inverter; it is only additional storage (kWh)
Note
Expansion units do not have
an LED. Wall-mounted Expansion units are installed
with the same glass front cover as Powerwall 3, but the logo on
the front will never light because there is no LED in the
unit.
Note
Expansion units are not field
serviceable.
Dimensions: The Expansion enclosure is the same
height and width as Powerwall 3, but is 1 inch (25 mm)
slimmer than Powerwall 3 (see diagram)
Mounting: Expansion units can be mounted
individually, or ground-mounted in a stacked
configuration behind a Powerwall 3
Expansion Connection: Expansion units can only be
connected to Powerwall 3 or other Expansion units via the Expansion Harness (see Expansion Harness). Each unit (Powerwall 3 and Expansion) has (2) Expansion
ports, one on each side of the enclosure
Note
The Expansion units are
electrically paralleled with a Powerwall 3.
System Size: Up to
(3) Expansion units can be connected
to the Leader Powerwall 3
Compatible Powerwall 3 Versions: Powerwall 3 units with Tesla P/N
1707000-xx-J or
greater are compatible with Expansion units
Flexibility:
The Expansion Harness can be
plugged in on either side of a Powerwall 3 or an Expansion unit
Powerwall 3 can be
installed at either end of a chain of Expansion units
Powerwall 3 can be
installed in the middle of a chain of Expansion units
Figure 1. Powerwall 3 Dimensions Compared
with Expansion Unit
Dimensions
Note
Powerwall 3 and the Expansion unit are both 43.5 in (1105
mm) tall when the glass front cover is installed.
Expansion Harness
The Tesla Expansion Harness is a non-metallic
sheathed hard-use appliance cable assembly rated for indoor or outdoor
installations. The cable uses an extruded TPE jacket, is moisture, flame and UV
resistant, and has a temperature rating of -40°C to 105°C. The harness is a listed
component of the Powerwall 3 and Expansion UL 9540 certifications and is
required for electrical connection between the ESS units. Field wiring of the Expansion unit, alteration of the Expansion Harness (e.g. splicing), and/or
routing the Expansion Harness through a wall or
partition are prohibited by the listing.
Warning
Do not modify
the Expansion Harness in any way. Doing
so would result in product damage that could void the product warranty.
Expansion harnesses can be plugged
into both the left and right ports on the Leader Powerwall 3. See Wall Mount an Expansion Unit for a table
of all allowable harness combinations.
CAUTION
The Expansion Harness ships in protective
packaging from the factory.
Do not remove the
protective packaging until ready to plug the Expansion Harness into the
Expansion port
If the Expansion Harness is
unplugged and needs to be set aside, place it back in the protective
packaging
If the Expansion Harness is dropped
or otherwise damaged, or if dust / debris enter its DC jaws and/or
communication ports, do not use that Expansion Harness.
Recycle it and use a new Expansion Harness
*Expansion harnesses can be plugged into
both the left and right ports on the Leader Powerwall 3. See Wall Mount an Expansion Unit for a table of
all allowable harness combinations.
Powerwall 3 Stacking Expansion Kit
1
1738120-xx-y
Wall bracket
2
1983307-xx-y
(4) mounting bracket shims
3
1978075-xx-y
(4) Torx T40 mounting bracket bolts
4
1978071-xx-y
(6) fir tree plugs, used to fill in the fastener holes on the
top and sides of the enclosure
5
1978068-xx-y
Fan front cover
Powerwall 3 Wall-Mount Expansion Kit
1
1738120-xx-y
Wall bracket
2
1730711-00-A
(9) Bridgeport US-6171 straps for Expansion Harness
cable management
