Remote Arbitrage; Sell; Island Mode - Generac Power Systems PWRcell XVT076A03 Installation And Owner's Manual

Figure 7-31. Priority Backup
See Figure 7-32. 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.

Remote Arbitrage

This system mode is only to be enabled and configured
for Distributed 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 or selectable
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 be supported by avail-
able PV and ESS power depending on the configuration
of the PWRcell system and inverter settings.

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 Manual
for more information.

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
Installation and Owner's Manual for Generac PWRCell Inverter
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.
009959
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.
Table 7-3. Island Mode AC Short Circuit
Peak AC short-circuit current contribution
Peak output fault current duration
Peak output RMS fault current
Max 3-Cycle RMS output fault current
Max fault current duration (Current limit in
overload 32 A rms)
System Operation
Figure 7-32. Island Mode
Current Contribution
013085
370 A p-p
300 us
125 A rms
47.7 A rms
6.23 s
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