Install Manual
Safety Rules & General Information
Installation Manual for Generac PWRCell Inverter 3
Electrical Hazards
(000104)
DANGER
Electrocution. Water contact with a power 
source, if not avoided, will result in death 
or serious injury.
(000604)
DANGER
Electrocution. PWRcell Battery front cover should be 
removed by a qualified technician only. Removing 
the front cover could result in death, serious injury, 
equipment or property damage.
(000145)
DANGER
Electrocution. In the event of electrical accident, 
immediately shut power OFF. Use non-conductive 
implements to free victim from live conductor. Apply 
first aid and get medical help. Failure to do so will 
result in death or serious injury.
(000599)
Electrocution. Turn battery disconnect OFF and 
de-energize REbus before touching terminals. 
Failure to do so will result in death, serious injury, 
equipment and property damage.
DANGER
(000152)
DANGER
Electrocution. Verify electrical system is
properly grounded before applying power.
Failure to do so will result in death or serious
injury.
Safety Shutdown
(000600)
DANGER
Electrocution. Initiate a system-wide safety shutdown 
and turn PWRcell Disconnect Switch OFF on all 
connected batteries before performing service. Failure 
to do so will result in death, serious injury, equipment 
and property damage.
NOTE: A loss of grid power will not de-energize REbus 
in a system configured to island or provide backup power.
See  Figure 1-1. Shutdown button (A) on the Generac 
PWRcell Inverter control panel activates Safety 
Shutdown. Safety Shutdown signals connected devices 
to shutdown and limit output voltage to a safe level. An 
external shutdown button may also be installed, given 
appropriate labeling.
NOTE:   An additional remote safety shutdown may be 
required to be installed for local compliance.
To enter Safety Shutdown, press and hold Shutdown (A). 
Safety shutdown LED (B) will illuminate and LCD screen 
(C) will indicate Safety Shutdown has been initiated.
REbus Inverter
Internet
Shutdown
(hold)
009918
A
C
B
Figure 1-1. Safety Shutdown Button (Located on 
Inverter Control Panel)
Upon entering Safety Shutdown, a shutdown signal will 
be transmitted to all devices connected to REbus. In 
Safety Shutdown:
• Generac PWRcell Inverter will disconnect from the 
grid.
• Generac PWRcell Inverter will stop sourcing power 
to REbus, and immediately disable all sources on 
REbus by sending a global shutdown signal. 
• All Generac PV Link optimizers will disconnect 
their output.
• Safety Shutdown LED (B) will be illuminated to 
show that the inverter has entered safety shut-
down. REbus DC bus voltage will be displayed on 
the inverter screen. 










