Class 0 electrical insulated gloves with leather protectors
Hard toe footwear
Check with to confirm
that Powerwall has been discharged to a safe level for shipping.
Set up cones around the working
zone.
Turn off the system shutdown switch, if one is installed.
Flip the battery enable switch
to the “OFF” position.
Isolate and turn off all
Powerwall breakers in the Gateway or backup load center.
Apply breaker clasp and
LOTO.
Wait 30 seconds to allow voltage
to drop to safe level.
Unscrew the six fascia screws
using a Torx T20 head screwdriver, remove the front cover, and set it aside away
from the battery.
Use a multimeter to test the AC
and PV terminals to verify 0 volts. For the AC circuit, check line to line and
line to neutral, with the digital multimeter set to VAC test mode. Use VDC test
mode for PV terminals, testing positive to negative, positive to ground, and
negative to ground. All readings should be close to 0.
Note
If you are still seeing
voltage, go back to steps 2 through 5 to make sure the breaker and
shutdown switch are off. If still seeing voltage after revisiting steps 2
through 5, reach out to your manager.
Warning
This step
requires the use of Class 0 electrical insulated gloves with leather
protectors
Use a 3 mm or 3/32” flathead
screwdriver to depress the wire tabs and pull out all wires from the PV
connector.
Note
Make sure the wires are
labeled according to string terminals before disconnecting
Use electrical tape to wrap head
of the positive wires (red wires).
Use a Torx T20 bit screwdriver
to disconnect the ground wires (green wires).
Use a 4.5mm or 3/16” flathead
screwdriver to depress the wire tabs and pull out all wires from the AC
connector. If unable to disconnect wires, as a last resort:
Use wire cutters to cut
the three AC connector wires, leaving 1” of wire sticking out of the
connector.
Remove the two bolts
securing the terminal and remove the terminal
Use a wrench to pull out
the wires
Install the terminal back
to Powerwall
Apply tape to the
terminal to note that the terminal cannot be reused
Guide the AC wires away from fan
duct assembly until they are outside of Powerwall. Then add Burndy blocks to the
end of the L1 & L2 AC wires and wrap them in electrical tape.
Note
AC wires are stiff and can
damage the plastic TACO cover if not handled carefully.
Unscrew and disconnect all
connectors from the TACO. Use electrical tape to tape the connectors.
Note
Don’t remove wires from connectors
Open the conduit box and pull
out the PV wires, carefully guiding them away from the fan duct assembly. Ensure
that the PV wires do not interfere with the TACO or other component in the
wiring bay.
Disconnect the AC conduit and feed the AC wires through the conduit opening.
Wrap the wires in a neat bundle with electrical tape or zip tie.
This is what the wiring compartment should
look like at this stage:
