Protected Loads - Generac Power Systems PWRcell 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 5-8. The PWRcell Inverter is configured to
pass grid power from AC grid terminals through to the
protected loads terminals so long as the Protected Loads
Disconnect is in the ON position. This includes when the
inverter is disabled. During a grid outage, internal relays
inside the inverter isolate the AC grid connection and the
A
F
Figure 5-8. Single Inverter Backup Installation with Protected Loads Panel
NOTE: See Figure 5-9. On systems that do not include battery storage but where 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
20
(000648a)
(000649a)
B
D
C
G
B
D
Figure 5-9. Configuration for Adding Batteries Later
inverter powers the protected loads only, using PV array
and battery power. This transition takes place in a
fraction of a second.
1. To create a protected loads panel: Connect the
circuits that require backup to a subpanel.
2. Size subpanel loads to the 40 A OCPD for
interconnection or the attached energy storage,
whichever is the lesser of the two.
3. Connect this subpanel to the protected loads
terminals in the inverter.
4. See
Figure 5-8. When configured to backup a
protected loads subpanel the PWRcell Inverter can
provide up to 7.6 kW of continuous power.
5. 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,
7.6 kW and 11.4 kW respectively.
NOTE: Class 2 low voltage cable shall be installed
independent of other power conductors. See NEC
725.136 for additional information.
G
A PV Array
B PWRcell Inverter
C Protected Loads Panel
D
Protected Loads Disconnect
E AC Main Panel
F PWRcell Battery
G Utility
E
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
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