Island Mode - Generac Power Systems PWRcell Reference Manual

Section 1 The PWRcell System
See Figure 1-7. If solar and grid power are available,
both can charge the battery. The system displays the
amount of power being drawn from the grid and the
amount of power being consumed by local loads before
reaching the battery.
Figure 1-7. Priority Backup
See Figure 1-8. If there is a utility service interruption
while operating in Priority Backup, the system will enter
Island Mode. Protected loads will be supported by solar
and battery power. If enough solar power is available,
solar will simultaneously charge the battery and support
the loads.
Sell
Sell mode sets the system to export all available DC
power to the grid up to the rated grid-tied output maxi-
mum. Available power from solar is exported first, fol-
lowed by stored energy from the battery. When exporting
power, connected batteries discharge to the grid until
their state of charge reaches the MinSocRsrv setpoint.
Once a battery is depleted to this point, it will not charge
again until either of the following are true:
•
Solar production exceeds the inverter rated grid-
tied output power maximum.
•
The inverter system mode is changed to a system
mode prioritizing battery backup.
See the Generac PWRcell Battery Installation and
Owner's Manual for more information.
Remote Arbitrage
This system mode is only to be enabled and configured
for Distributive Energy Resource (DER) aggregation for
the purposes of explicit control of a PWRcell system via
IEEE 2030.5 communication protocol.
By default, this system mode is not enabled
via the inverter control panel. If this system mode is
enabled and selected without proper configuration, the
inverter will not export AC power through its AC Grid
Connection terminals. By default, in the event of an out-
age in this system mode, local loads connected to the
Protected Loads terminals may
able PV and ESS power depending on the configuration
of the PWRcell system and inverter settings.
4
009959
or selectable
be supported by avail-

Island Mode

In the event of a grid outage, the PWRcell Inverter enters
Island Mode. While in Island Mode, the inverter discon-
nects from the utility grid and powers the building from
the REbus nanogrid. In a typical solar-plus-storage con-
figuration, this means all REbus-connected batteries will
work together with the PV links to supply power to
REbus. The inverter will pull power from REbus to pro-
vide AC power to protected loads.
In Island Mode, the inverter will display "Islanding" on the
home screen and a status of "islanded" on the inverter
device page. Herein, use of islanding and islanded refer
to Island Mode.
Figure 1-8. Island Mode
Islanding
2.00kW 7.00kW
375V
DC
7.40kW
Figure 1-9. Island Mode with Integrated AC Generator
NOTE: To enter Island Mode, the inverter setpoint,
"EnaIslanding", must be set to 'on' (default value) and the
system mode can not be set to Grid Tie.
NOTE: If EnaIslanding is set to "off" when an outage
occurs, the inverter will disconnect from the grid and
enter Standby state if DC power is available from REbus
devices. If DC power is not available from REbus
devices, the inverter will power off. Backup loads will not
be powered.
013085
240V
DC
12.5kW
013099
Diagnostic Repair Manual