Commissioning Multiple Inverter Systems; Plm Crosstalk; How To Identify Plm Crosstalk; Multiple Inverter System Pre-Commissioning Checklist - Generac Power Systems XVT076A03 Installation And Owner's Manual

Commissioning
How to set:
1. Navigate to the inverter device page.
2. Disable inverter if enabled.
3. Access the Installer Configuration Tool through the
REbus Beacon. See
tion Tool (optional).
4. Once logged onto the Installer Configuration Tool,
select "Inverter."
5. From the Inverter menu select "PWRcell Configu-
ration."
6. See
Figure 6-31. Find the Export Limiting setting
and select "ENABLED".
7. Scroll to the bottom and locate Export Limit.
8. Change the setting value. If Zero Export is neces-
sary, make this value 0 (watts).
9. Click the "Submit" button at the bottom of the page.
10. Be sure to generate a compliance report once all
compliance settings have been set. See
Compliance section for more information.
Figure 6-31. Export Limit
NOTE: These settings are included in the Compliance
PDF. See Proof of Compliance
mation.
Commissioning Multiple Inverter
Systems

PLM Crosstalk

NOTE: Do not energize two or more inverters before
commissioning. Energizing two or more inverters prior to
commissioning will result in crosstalk.
36
Access Installer Configura-
Proof of
011686
section for more infor-
PWRcell Inverters are manufactured with some common
default parameters. One of these default parameters is
the default Power Line Modem (PLM) channel. PWRcell
Inverters use the PLM channel to communicate with and
send commands to REbus-powered devices. In this way,
a PWRcell Inverter behaves like a master device. If two
or more master devices are communicating on the same
PLM channel, REbus devices become unable to respond
properly to the intended master device and the master
devices will attempt to provide control for the other, often
leading to communication and reporting issues. This is
referred to as cross-talk.

How to identify PLM Crosstalk

Cross-talk can be easily identified by navigating to the
device pages on an inverter control panel. If two inverter
device pages exist, crosstalk has occurred. Similarly, if
any REbus devices from one inverter show up on
another, crosstalk has occurred.
NOTE: To differentiate one inverter device page from
another, confirm the RCP numbers via the device page
sub-menu.
NOTE: It is recommended to keep a list of which REbus
devices are connected to specific inverters at multi-sys-
tem sites.
Multiple Inverter System Pre-Commissioning
Checklist
Before commissioning multiple inverter systems, confirm
the following:
•
Inverter systems (including PV Links and PWRcell
Batteries) have been installed per manufacturer
instructions and to local and state code require-
ments.
•
PWRcell Batteries have their Battery Disconnect
switches in the OFF position.
•
PWRcell Inverters are powered off with no voltage
present at their AC Grid terminals. Use an appro-
priately rated multi-meter/voltmeter to verify if AC
voltage is present at the AC Grid terminals.
NOTE: To determine if the inverter is powered off, check
the inverter control panel and the system backfeed
breaker. When powered-off, the inverter control panel will
be blank and the inverter backfeed breaker will be OPEN.
Multiple Inverter System Commissioning
Procedure
NOTE: Throughout this process, it is important that only
one inverter is energized at any time. If two or more
inverters are energized at any point during this process,
the inverters will cross-talk. To resolve crosstalk, see
PLM Crosstalk Recovery
crosstalk, the commissioning process will need to be
restarted for the cross-talked inverters.
Installation and Owner's Manual for Generac PWRCell Inverter
Procedure. After resolving