Before terminating
any conductors inside Powerwall 3, ensure that the Enable switch
is turned OFF to de-energize the system. Confirm lack of voltage at the AC and PV
terminals before proceeding.
Note
When using Eaton branch
breakers on continuous loads such as Powerwall, Eaton strongly recommends using only
type BR breakers that end in H
(for instance BR260H).
Disconnect the AC circuit breaker
of the main service disconnect and secure it against reconnection.
Select the appropriate Powerwall 3 breaker size depending on
the desired power / current output (configured in Tesla One):
Table 1. Maximum Continuous
Power / Current Options
Maximum Continuous
Current
Power Output (AC)
Breaker (Overcurrent
Protection)
48 A On-grid 64 A Off-grid*
11.5 kW On-grid 15.4 kW Off-grid*
80 A*
48 A
11.5 kW (default)
60 A
41.7 A
10 kW
60 A
31.7 A
7.6 kW
40 A
24 A
5.8 kW
30 A
*Powerwall 3 can only provide 15.4
kW when off-grid and
when there is sufficient
solar; when the system is on-grid, and/or when solar production is
insufficient, Powerwall 3 will provide 11.5 kW.
If enabling this feature, Powerwall 3 must be installed with
an 80 A breaker and appropriately sized conductors.
(Conduit installations only) Run
conduit as needed and attach the conduit fitting to the Powerwall 3 AC wiring knockout.
Run the AC power conductors and
the equipment grounding conductor from the main panel through the conduit or
cable gland, pulling 24 inches (610 mm) of wiring into the enclosure. Route the
conductors to the appropriate terminals, creating a service loop with the extra
wiring (see Powerwall 3 AC
Wiring for an example of a service loop).
CAUTION
Any wire
routing must be done through the wire management tabs at the top of the
enclosure. Do not route loose wires through the front of the enclosure or
over the Tesla Asset Controller.
Connect the Powerwall 3 equipment grounding
conductor:
Strip the conductor
insulation up to 3/4-inch (19 mm).
Insert the grounding
conductor in an equipment grounding terminal and tighten the screw in
the Earth terminal to 35 in-lb (4 Nm).
Note
It is best
practice to connect the ground circuit before making any AC circuit
connections.
Connect the Powerwall 3 AC power conductors to the
main panel or sub panel according to the electrical service type.
Note
Each Powerwall 3 requires a circuit
overcurrent protection device (see table above for required breaker size
based on configured power output). This device serves as the disconnect for
Powerwall 3 and must be wired in
accordance with local wiring codes and regulations.
Note
Tesla recommends a circuit
breaker for overcurrent protection, as a circuit breaker can easily be reset
by the homeowner if needed. As such, the required overcurrent protection
device is referred to as the Powerwall 3 circuit breaker
throughout this manual. Alternative overcurrent protection devices, such as
a fused disconnect, may be used and may result in a poor customer experience
if the homeowner cannot reset the system in the unlikely event of a
trip.
CAUTION
If using a fuse as the Powerwall 3 overcurrent protection
device, it must be a Class RK1 Fast Acting fuse. Use one of the following
fuses or equivalent:
Fuse Type
Manufacturer
Part Number
80 A Fast-Acting Fuse, Class RK1, >=
250VAC, CLF
Littelfuse
KLNR080
Eaton / Bussmann
KTN-R-80
Mersen / Ferraz Shawmut
A2K80R
60 A Fast-Acting Fuse, Class RK1, >=
250VAC, CLF
Littelfuse
KLNR060
Eaton / Bussmann
KTN-R-60
Mersen / Ferraz Shawmut
A2K60R
40 A Fast-Acting Fuse, Class RK1, >=
250VAC, CLF
Littelfuse
KLNR040
Eaton / Bussmann
KTN-R-40
Mersen / Ferraz Shawmut
A2K40R
30 A Fast-Acting Fuse, Class RK1, >=
250VAC, CLF
Littelfuse
KLNR030
Eaton / Bussmann
KTN-R-30
Mersen / Ferraz Shawmut
A2K350
On the Powerwall 3 product label on the left
side of the unit, use a paint pen, permanent marker, or similar to mark the
configured power / current output.
Note
If required, install
a Power Control System (PCS) field marking label on the side of Powerwall 3 and mark the configured
maximum current output on the label.
If enabling 15.4 kW power when
Powerwall 3 is off-grid, use a paint
pen, permanent marker, or similar to mark the Powerwall 3 product label on the left
side of the unit.
Note
The Powerwall 3 power / current output
must be configured as 11.5 kW (48 A) to enable 15.4 kW power when
off-grid.
Clear out any debris that may be
present in the AC wiring terminals.
Warning
Metal debris
like loose wires or metal shavings could create a high voltage risk when
Powerwall is turned on.
For each AC conductor:
Strip the conductor
insulation up to 7/16-inch (11 mm). Add a ferrule if the conductor is
finely stranded.
Insert the conductor as
far as possible into the terminal.
Warning
Ensure
the conductors are inserted into the round terminals and not the
rectangular slots. Inserting the conductors anywhere other than the
round terminals will result in poor wire termination.
Perform a pull test to
ensure the conductor is fully seated in the terminal. Push the conductor
back in after the pull test.Figure 1. Powerwall 3 AC
Wiring
After installing the AC
conductors and equipment grounding conductor, gather them and secure
them with the provided cable tie as shown above.
Note
If a conductor must be removed from
the connector, insert a cabinet or electronics tip slotted screwdriver (up to
3/16-inch or 4.5 mm) into the actuation shaft to open the terminal. Pull the
conductor free, then remove the screwdriver.Figure 2. Spring Terminal with
Screwdriver and Insert Conductor in Terminal
Required UL 1741 PCS Compliance
Information
Note
The Tesla Powerwall 3 system is certified to UL
1741 PCS for the energy storage system (ESS) operating modes of import and
export only. The installer can select three modes of operation for the system:
No Site Export, PV Only Export, and PV, Battery Export.
NO SITE EXPORT:
The battery and solar will not export beyond the site meter, other than
inadvertent export.
PV ONLY EXPORT:
The battery will not export beyond the site meter, other than
inadvertent export. The export at the site meter will be limited to the
export from as measured by the solar meter.
PV, BATTERY
EXPORT: The battery and solar will export beyond the site
meter.
Note
To achieve UL 1741 PCS Import
Only behavior, either PV ONLY
EXPORT or NO SITE
EXPORT must be selected. When the selected Grid Code applies to a region
that requires UL 1741 PCS, such as California UL 1741 SA, the default setting is
PV ONLY EXPORT. In the
locally hosted Configuration Interface it is possible to further restrict the
system to NO SITE EXPORT;
however once set, it is not possible to change back to PV ONLY EXPORT. It is not
possible to configure the system to allow BATTERY EXPORT in this
mode.
Note
To achieve UL 1741 PCS Export
Only behavior, PV, BATTERY
EXPORT must be selected and the import rule must be set to charge only
from solar (and not charge from the grid). When the selected Grid Code applies
to a region that requires UL 1741 PCS, such as California UL 1741 SA, the
default setting is PV ONLY
EXPORT. In the locally hosted Configuration Interface it is possible to
further restrict the system to NO SITE EXPORT; however once set, it is not possible to change back to
PV ONLY EXPORT or PV, BATTERY EXPORT.
Note
This system is equipped with a
power control system (PCS) which is suitably rated to provide branch circuit
overcurrent protection. The controlled current setting shall not exceed the
rating of any controlled busbars or conductor ampacity.
Note
The PCS controlled current
setting for each PCS controlled conductor or bus bar shall be indicated with a
field applied marking label on the conductor or in close proximity to the
busbar.
Figure 3. PCS Field Marking
Label
Warning
Only qualified
personnel shall be permitted to set or change the setting of the maximum
operating current of the PCS. The maximum PCS operating current setting shall
not exceed the busbar rating or conductor ampacity of any PCS controlled busbar
or conductor.
Warning
Configuration of
power control settings system or changes to settings shall be made by qualified
personnel only. Incorrect configuration or setting of the power control settings
may result in unsafe conditions.
Note
The maximum operating currents
in controlled busbars or conductors are limited by the settings of the power
control system (PCS) and may be lower than the sum of the currents of the
connected controlled power sources. The settings of the PCS controlled currents
may be used for calculation of the design currents used in the relevant sections
of NEC Article 690 and 705.