Protected Loads - Generac Power Systems XVT076A03 Installation And Owner's Manual

Electrical Connections

Protected Loads

CAUTION
Equipment damage. Never connect protected loads
terminals to other sources of power, including any other
inverter, the utility grid, or a generator. Doing so could
result in equipment or property damage.
CAUTION
Equipment damage. Never connect protected loads
output from inverters in parallel. Doing so could result
in equipment or property damage.
For systems equipped with energy storage, the inverter's
protected loads terminals provide power during a grid
outage.
NOTE: The protected loads terminals can only provide
two phases of power in a three-phase system.
See Figure 5-5. By default, the grid will power protected
loads connected to the inverter protected loads terminals
as long as the Protected Loads Disconnect is in the ON
position. The PWRcell Inverter is configured to pass grid
A
F
Figure 5-5. Single Inverter Backup Installation with Protected Loads Panel
NOTE: See
Figure 5-6. On systems that do not include battery storage but battery storage is expected in the future,
install a protected loads panel during inverter installation. The protected loads panel will be fed by the grid while the
system operates in Grid Tie mode.
A
C
18
(000648a)
(000649a)
B B
C
B
D
Figure 5-6. Configuration for Adding Batteries Later
power from AC grid terminals through to the protected
loads terminals. This includes when the inverter is
disabled. During a grid outage, internal relays inside the
inverter isolate the AC grid connection and the inverter
powers the protected loads only, using PV array and
battery power. This transition takes place in a fraction of
a second.
NOTE: To create a protected loads panel, connect the
circuits that require backup to a subpanel. Connect this
subpanel to the protected loads terminals in the inverter.
•
See Figure
protected loads subpanel the PWRcell Inverter can
provide up to 7.6 kW of continuous power.
•
The inverter can surge up to 50 A for motor starting
capabilities.
NOTE: Actual power output for protected loads during a
grid outage will depend on system sizing for batteries and
solar array.
NOTE: Backup power ratings are separate from the
power ratings for PWRcell Inverters while grid connected,
7.6kW and 11.4kW respectively.
G
A
B
C
D
E
F
G
E
D
G
A
PV Array
B PWRcell Inverter
C Protected Loads Panel
D Protected Loads Disconnect
E
AC Main Panel
G Utility
E
Installation and Owner's Manual for Generac PWRCell Inverter
5-5. When configured to backup a
PV Array
PWRcell Inverter
Protected Loads Panel
Protected Loads Disconnect
AC Main Panel
PWRcell Battery
Utility
009997
009998