Generac Power Systems PWRcell XVT076A03 User manual

SAVE THIS MANUAL FOR FUTURE REFERENCE
Register your Generac product at:
WWW.GENERAC.COM
1-888-GENERAC
(1-888-436-3722)
Owner’s Manual
Generac PWRcell™ Inverters
XVT076A03
XVT114G03
009954
(000209b)
WARNING
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.
Register your Generac product at:
https://pwrfleet.generac.com
1-888-GENERAC
(888-436-3722)
Para español, visita: http://www.generac.com/service-support/product-support-lookup
Pour le français, visiter: http://www.generac.com/service-support/product-support-lookup

ii Owner’s Manual for Generac PWRcell Inverter
Use this page to record important information about your Generac Product
Record the information found on your unit data label on this page. See Serial Number Locations.
When contacting an Independent Authorized Service Dealer (IASD) or Generac Customer Service, always supply the
complete model number and serial number of the unit.
Table 1: Generac PWRcell Inverter Important Information
Unit Model Number
Unit Serial Number
Date Purchased
Commissioning Date
(000393a)
WARNING
CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov.

Owner’s Manual for Generac PWRcell Inverter iii
Section 1:Introduction and Safety ................1
Introduction ..........................................................1
Read This Manual Thoroughly ....................................1
Safety Rules .........................................................1
How to Obtain Service .................................................1
General Hazards ..................................................2
Section 2:General Information .....................5
Specifications ......................................................5
Serial Number Location ......................................6
Unit Dimensions .................................................6
Component Locations .........................................6
About PWRcell Inverters .....................................6
Inverter Control Panel .........................................7
REbus Status LED ......................................................7
Inverter LED ................................................................7
Internet LED ................................................................8
Shutdown Mode ..........................................................8
System Modes Overview .....................................8
Grid Tie ........................................................................8
Clean Backup ..............................................................9
Priority Backup ............................................................9
Self Supply ..................................................................9
Self Supply Setpoints ................................................10
Section 3:Operation ....................................13
Operation and User Interface ....................................13
Home Screen ......................................................13
Selecting System Modes ...................................13
Device Pages ......................................................14
Enabling and Disabling Devices ................................14
Mod. Settings Menu ...........................................15
Ethernet Configuration ......................................17
Ethernet Setup ..........................................................17
Serial Number and Registration .......................17
Other External Communications
Generac Beacon ................................................17
Section 4:Maintenance ................................19
Service ................................................................ 19
Annual Maintenance ......................................... 19
Inspecting Vents ........................................................19
Cleaning Intake Filter ................................................19
Recovery From an Error State ......................... 19

iv Owner’s Manual for Generac PWRcell Inverter
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Introduction and Safety
Owner’s Manual for Generac PWRCell Inverter 1
Section 1: Introduction and Safety
Introduction
Thank you for purchasing a Generac PWRcell™ product.
The PWRcell inverter is a storage-ready inverter that
connects to PV Link™ optimizers and PWRcell batteries
to form the PWRcell system.
This owner’s manual provides instructions for
programming, configuring, registering and
commissioning the PWRcell Inverter. See the Generac
PWRcell Inverter Installation Manual for installation
instructions.
The information in this manual is accurate based on
products produced at the time of publication. The manu-
facturer reserves the right to make technical updates,
corrections, and product revisions at any time without
notice.
Read This Manual Thoroughly
If any section of this manual is not understood, contact
the nearest Independent Authorized Service Dealer
(IASD) or Generac Customer Service at 1-888-436-3722
(1-888-GENERAC), or visit www.generac.com for assis-
tance. The owner is responsible for correct maintenance
and safe use of the unit.
This manual must be used in conjunction with all other
supporting product documentation supplied with the
product.
SAVE THESE INSTRUCTIONS for future reference. This
manual contains important instructions that must be fol-
lowed during placement, operation, and maintenance of
the unit and its components. Always supply this manual
to any individual that will use this unit, and instruct them
on how to correctly start, operate, and stop the unit in
case of emergency.
Safety Rules
The manufacturer cannot anticipate every possible cir-
cumstance that might involve a hazard. The alerts in this
manual, and on tags and decals affixed to the unit, are
not all inclusive. If using a procedure, work method, or
operating technique that the manufacturer does not spe-
cifically recommend, verify that it is safe for others and
does not render the equipment unsafe.
Throughout this publication, and on tags and decals
affixed to the unit, DANGER, WARNING, CAUTION, and
NOTE blocks are used to alert personnel to special
instructions about a particular operation that may be
hazardous if performed incorrectly or carelessly. Observe
them carefully. Alert definitions are as follows:
NOTE: Notes contain additional information important to
a procedure and will be found within the regular text of
this manual.
These safety alerts cannot eliminate the hazards that
they indicate. Common sense and strict compliance with
the special instructions while performing the action or
service are essential to preventing accidents.
How to Obtain Service
For assistance, contact the nearest Independent Autho-
rized Service Dealer (IASD) or Generac Customer Ser-
vice at 1-888-436-3722 (1-888-GENERAC), or visit
www.generac.com.
When contacting an IASD or Generac Customer Service,
always supply the complete model and serial number of
the unit as given on its data decal located on the unit.
Record the model and serial numbers in the spaces pro-
vided on the front cover of this manual.
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

Introduction and Safety
2 Owner’s Manual for Generac PWRCell Inverter
General Hazards •Connecting the PWRcell system to the electric util-
ity grid must only be done after receiving prior
approval from the utility company.
•Only competent, qualified personnel should install,
operate, and service this equipment. Strictly com-
ply to local, state, and national electrical and build-
ing codes. When using this equipment, comply with
regulations established by the National Electrical
Code (NEC), CSA Standard; the Occupational
Safety and Health Administration (OSHA), or the
local agency for workplace health and safety.
•Protection against lightning surges in accordance with
local electric codes is the responsibility of the installer.
NOTE: Lightning damage is not covered by warranty.
•Never work on this equipment while physically or
mentally fatigued.
•Any voltage measurements should be performed
with a meter that meets UL3111 safety standards,
and meets or exceeds overvoltage class CAT III.
(000191)
DANGER
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
WARNING
Risk of injury. Do not operate or service this machine
if not fully alert. Fatigue can impair the ability to
service this equipment and could result in death or
serious injury. (000215)
(000209b)
WARNING
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.
(000182a)
WARNING
Equipment damage. Only qualified service personnel may
install, operate, and maintain this equipment. Failure to
follow proper installation requirements could result in death,
serious injury, and equipment or property damage.
(000155a)
WARNING
Electric shock. Only a trained and licensed electrician
should perform wiring and connections to unit. Failure to
follow proper installation requirements could result in death,
serious injury, and equipment or property damage.
Equipment damage. Connect only to REbus-compatible
devices to the DC bus. Never connect to any other DC
power source. Connecting to other DC power sources
could result in equipment damage. (000598a)
CAUTION

Introduction and Safety
Owner’s Manual for Generac PWRCell Inverter 3
Electrical Hazards
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000604)
Electrocution. PWRcell Battery front cover should
be removed by a qualified technician only.
Removing the front cover could result in death,
serious injury, equipment or property damage.
DANGER
(000145)
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.
(000599)
Electrocution. Turn battery disconnect OFF and
de-energize REbus before touching terminals.
Failure to do so will result in death, serious injury,
equipment and property damage.
DANGER
(000152)
DANGER
Electrocution. Verify electrical system is
properly grounded before applying power.
Failure to do so will result in death or serious
injury.
(000188)
DANGER
Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.
(000187)
WARNING
Electrocution. Potentially lethal voltages are generated
by this equipment. Render the equipment safe before
attempting repairs or maintenance. Failure to do so
could result in death or serious injury.

Introduction and Safety
4 Owner’s Manual for Generac PWRCell Inverter
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Owner’s Manual for Generac PWRcell Inverter 5
General Information
Section 2: General Information
Specifications
Description Units XVT076A03 XVT114G03
Max. cont. grid-tied AC power @ 122°F (50°C) kW 7.6 11.4
Max. cont. islanded AC power @ 104°F (40°C)
with single 6 module battery cabinet1kW 9.0 9.0
Max. cont. islanded AC power @ 104°F (40°C)
with 2 battery cabinets (8 modules minimum) kW 11.0 Range 9.6 to 11.0*
Max. cont. Islanded AC power @ 122°F (50°C) kW 8.8 Range 7.5 to 8.8*
Peak motor starting current (2 sec) A rms 50
Normal output frequency AC Hz 60
Grid Voltage Line to Neutral (L-N) VAC 120
Grid Voltage Line to Line (L-L) VAC 240 208
Peak efficiency % 96 97
CEC weighted efficiency % 96.5 96.5
AC terminals wire size AWG 14 to 6
DC terminals wire size AWG 18 to 6
STOP terminals wire size AWG 28 to 16
Weight lb (kg) 62.7 (28.4)
Thermal management - forced convection
Weatherization rating - NEMA Type 3R
Enclosure Material - powder-coated steel
Description Units Min Nominal Max
REbus voltage V dc 360 380 420
REbus current A dc 302
REbus Input short circuit current3A dc 30
REbus Input source backfeed current to input source A dc 30
Output power factor rating AC - 1
Operating voltage range AC, XVT076A03 (L-N) V rms 108 120 130
Operating voltage range AC, XVT076A03 (L-L) V rms 216 240 260
Operating voltage range AC, XVT114G03 (L-N) V rms 108 120 130
Operating output voltage range AC, XVT114G03 (L-L) V rms 184 208 228
Continuous output current AC grid-tied A rms 32
PCS controlled current grid-tied Arms 32
Continuous output current AC islanded A rms 42
Output fault current duration A / ms 50 / 200
Full Power operating ambient temperature range4 °F (°C) -4 (-20) +122 (+50)
Utility interconnection voltage and frequency trip limits and
trip times See Voltage and Frequency Trip Thresholds in PWRcell Inverter
Installation Manual for more information.
Trip voltage and frequency limits
Trip voltage accuracy
Trip time accuracy % 2% +/- 2 cycles
1 Peak Performance
2 Inverter limits its REbus current to adhere to its AC power rating. Total REbus current capability from multiple REbus sources
may safely exceed this value as the inverter safely limits the amount utilized.
3 Rating for one DC input. Four total.
4 Includes ambient temperature rising from inverter operation.
* In Island mode XVT114G03 Protected loads only supply 2 phases 120 VAC L-N, 208 L-L which results in lower power than in grid
tied 3 phase mode.The low value of the range is for full L-L loading while high value of the range is full L-N loading.

6 Owner’s Manual for Generac PWRcell Inverter
General Information
Serial Number Location
Refer to Figure 2-2 to locate unit serial number (A).
Record the information from this tag in Table 1: PWRcell
Inverter Important Information on the inside front cover
of this manual.
Unit Dimensions
Figure 2-1. Unit Dimension
Component Locations
Figure 2-2. Component Locations
About PWRcell Inverters
The PWRcell inverter connects to PV Link™ optimizers
and PWRcell batteries to form the PWRcell system for
grid-interactive solar-plus-storage.
Upon the loss of grid power, PWRcell inverters
disconnect from the grid and provide AC power to
support protected loads when configured to do so.
All PWRcell products use the REbus™ 380 VDC
nanogrid to connect to each other. The REbus nanogrid
automates the flow of power to enable plug-and-play
setup and operation of PWRcell equipment. For more
information about REbus, visit www.generac.com.
In Figure 2-3 PWRcell inverter (E) is directly connected
to PV Link optimizers (B) and PWRcell battery (C) on DC
(REbus) lines (D). To the right of the inverter are AC
lines: 120/240 VAC for grid and home loads (G), and
protected loads (H) support.
A24-3/4 in (628 mm)
B19-3/8 in (491 mm)
C8-3/8 in (214 mm)
009651
B
A
C
009655
AControl panel
BIntake filter
CExhaust vent
DSerial number tag
009656
A
B
C
D

Owner’s Manual for Generac PWRcell Inverter 7
General Information
.
Figure 2-3. Generac PWRcell System Example
Inverter Control Panel
Figure 2-4. Inverter Control Panel
See Figure 2-4. The PWRcell system is controlled
through the PWRcell inverter control panel. The inverter
control panel is used for adjusting system settings and for
interacting with devices.
REbus Status LED
REbus Status LED (C) communicates REbus nanogrid
status through LED color.
•Green – all devices are functioning normally and
generating power on Rebus.
•Yellow – no PV Links are generating power from
PV on REbus.
•Red – one or more REbus device has a fault that
requires attention before operation will continue.
NOTE: A red LED can also indicate a fault with the
REbus wiring itself. See display (A) for more information
about the specific fault detected.
Inverter LED
Inverter LED (D) communicates the status of the utility
grid and/or inverter through LED color and state.
•Green – utility is connected and within normal
operational voltage and frequency.
•Yellow – utility grid is not within normal conditions
and the inverter is in a waiting state. User
intervention typically is not required. The inverter
will restart as soon as the utility grid returns to
normal conditions.
•Red – a serious fault with the utility grid or inverter
has been detected and user attention is required
before the unit will resume operation. See display
(A) for more information about the fault detected.
•No light – the inverter is disabled, islanded, or
powered off.
ASolar Panels DREbus GLoads
BPV Link EPWRcell Inverter HProtected Loads
CPWRcell Battery FGrid
009893
A
C
D
E
F
G
H
B
B
B
D
ALCD display
BNavigation keys
CREbus status LED
DInverter LED
EShutdown
FShutdown LED
GInternet LED
REbus Inverter
Internet
Shutdown
(hold)
009894
A
D
C
B
G
E
F

8 Owner’s Manual for Generac PWRcell Inverter
General Information
Internet LED
Internet LED (G) is illuminated when the inverter is
connected to a router and has an IP address. See
Ethernet Configuration.
NOTE: A blue Internet LED does not mean that the
inverter has a connection to with the Generac server.
Shutdown Mode
NOTE: A loss of grid power will not de-energize REbus
in a PWRcell system configured to island with enabled
energy storage.
Shutdown button (E) activates a transition to shutdown
system mode. Use of the shutdown system mode is only
intended for servicing and troubleshooting equipment. It
is not intended to be utilized to meet NEC rapid shutdown
requirements.
Shutdown mode signals all communicating PWRcell
equipment on REbus, including the PWRcell inverter, to
disable. Disabled PWRcell equipment will drop their
output voltages to safe levels.
To enter shutdown, press and hold shutdown button (E).
In shutdown mode:
•PWRcell inverter will stop sourcing power to
REbus, and immediately disable all communicating
power sources on REbus by sending a system-
wide system mode change signal.
NOTE: Successful signal transmission relies upon
proper configuration of PLM channels across REbus
devices (PV Links and Batteries).
•Shutdown LED (F) will illuminate.
•Disabled PWRcell batteries will open their REbus
contacts.
•Inverter screen (A) will display REbus DC bus volt-
age and text indicting shutdown mode has been
initiated.
NOTE: The AC section of the inverter will still be
energized unless the building AC disconnect or main
service breaker is shut off.
System Modes Overview
Generac PWRcell offers several system modes for various installation configurations, markets, and applications.
Connected REbus devices work together to manage the distribution of power based on the selected system mode.
Some modes interact with PWRcell batteries to store power and/or balance production and consumption.
See Table 2-1 and Table 2-2 for an overview of available system modes.
Grid Tie
In Grid Tie mode, the PWRcell inverter functions as a
conventional grid-tied inverter system. The system
powers local loads and when generation exceeds load
demand, excess power is exported to the utility for net
metering and other credits.
NOTE: Grid Tie is intended for use with systems that do
not include a PWRcell battery. For systems where a
PWRcell battery will be connected at a later date, operate
in Grid Tie mode until the battery is installed.
(000600)
DANGER
Electrocution. Initiate a system-wide shutdown and turn the
PWRcell DC Disconnect Switch OFF on all connected
batteries before performing service. Failure to do so will
result in death, serious injury, or equipment and property
damage.
Table 2-1. Most Common System Inverter Modes
Priority Grid Tie Clean Backup Priority Backup Self Supply
1 Support local loads Charge batteries from bus Charge batteries from bus Support local loads
2 Export to grid Support local loads Charge batteries from grid Charge batteries from bus
3 - Export to grid Support local loads Export to grid
4 - - Export to grid -
Table 2-2. Optimal Configuration for Goal
Goal Optimal Inverter Configuration
Keep batteries charged as much as possible Priority Backup
Keep batteries charged using only solar power Clean Backup
Net-metering solar energy without a battery Grid Tie
Use grid as little as possible Self Supply

Owner’s Manual for Generac PWRcell Inverter 9
General Information
Clean Backup
NOTE: Grid power is not used to charge batteries in this
mode.
See Figure 2-5. In Clean Backup mode, the inverter
prioritizes keeping the battery charged and ready for a
grid interruption using solar power only. If the battery is
not fully charged, the inverter uses all available solar
power to charge the battery.
See Figure 2-6. When the battery is fully charged, solar
power will flow to local loads and the grid.
Figure 2-5. Clean Backup (1 of 3)
Figure 2-6. Clean Backup (2 of 3)
See Figure 2-7. When grid service is interrupted, the
system enters Islanding mode. In Islanding mode,
protected loads are supported by solar and battery
power. If enough solar power is available, the solar will
simultaneously charge the battery and support the loads.
Figure 2-7. Clean Backup (3 of 3)
Priority Backup
In Priority Backup mode, the inverter prioritizes keeping
batteries charged and ready for grid interruption using
solar or grid power. If the battery is not fully charged, all
available solar power is used to charge the battery. When
the available solar power is lower than the battery input
power rating, the inverter uses grid power to expedite
battery charging.
See Figure 2-8. 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 2-8. Priority Backup (1 of 2)
See Figure 2-9. In the event of grid failure, the inverter
enters Islanding mode. Protected loads are supported by
solar and battery power. If enough solar power is
available, the solar simultaneously charges the battery
and supports the loads.
Figure 2-9. Priority Backup (2 of 2)
Self Supply
NOTE: This feature requires CTs to be properly installed
and calibrated prior to use. For more information on CT
calibration, see the PWRcell Inverter Installation Manual.
In Self Supply mode, the inverter prioritizes powering
local loads using solar and/or stored power first. This
mode is optimal in markets where net metering is
unavailable or unfavorable, making battery-stored power
more economically attractive than grid-provided power.
See Figure 2-10. If more power is being produced by the
009956
009957
009958
009959
009961

10 Owner’s Manual for Generac PWRcell Inverter
General Information
solar array than is needed by local loads, the inverter
stores the energy in the battery for later use.
Figure 2-10. Self Supply (1 of 3)
See Figure 2-11. When the battery is full and a surplus of
power is available, that surplus is exported to the grid.
Figure 2-11. Self Supply (2 of 3)
See Figure 2-12. When local demand exceeds available
solar-generated power, the battery supplies power to
support local loads. If the building requires more power
than the battery and solar can provide, then the excess
demand is drawn from the grid.
Figure 2-12. Self Supply (3 of 3)
Self Supply Setpoints
The TargMaxImprtP and TargMinImprtP setpoints allow
the building to deliberately import power from the grid
within certain limits. This is useful for specialized
applications, such as peak avoidance.
These setpoints are relevant to Self Supply mode only,
and are only used for specific applications. See Table 2-
3: Self Supply Setpoints.
009962
009963
011241
Table 2-3. Self Supply Setpoints
Setpoint Description Default Units
TargMaxImprtP
Target Maximum Import Power
•Maximum power imported from the grid at any point.
•When the overall building load exceeds this setpoint, the inverter will supply
additional power from the battery and solar array to keep grid import power
below this level.
•This maximum is not guaranteed. If insufficient battery and solar power is
available to cover the load, then the grid will supply the additional power.
0 W
TargMinImprtP
Target Minimum Import Power
•Use this setpoint to charge the battery from the grid.
•If the overall building load is less than this setpoint, the inverter will import
power to the battery to keep the grid import power up to the setpoint.
•If the building load is above the setpoint, the inverter will stop importing
additional power to charge the battery.
•This minimum is not guaranteed. Once the battery is full, grid import power
may fall below this level.
0 W

Owner’s Manual for Generac PWRcell Inverter 11
General Information
Sell
Sell mode commands the system to export all available
power to the grid. Any connected batteries drain 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:
•The solar energy available exceeds the inverter
max AC Power.
•The inverter system mode is changed to a system
mode prioritizing battery backup.
See the Generac PWRcell Battery Installation Manual for
more information.
Export Override
NOTE: This feature requires CTs to be properly installed
and calibrated prior to use. For more information on CT
calibration, see the PWRcell Inverter Installation Manual.
NOTE: This feature is NOT intended to serve as a
means of achieving compliance to Utility interconnection
requirements. For information on export limiting settings
related to Utility compliance, see the PWRcell Inverter
Installation Manual.
When enabled, Export Override allows the user to restrict
inverter export such that excess power is not sent back to
the grid. The system limits solar power generation to
match power consumption measured by the PWRcell
CTs. This feature is suitable as a simple and easy option
for systems pending permission to operate (PTO) where
the Utility does not specify a requirement for the system
to be de-energized or otherwise disabled pending
approval. Using the Inverter control panel, a user can find
this feature on the Mod. Settings sub-menu within the
Inverter device page.

12 Owner’s Manual for Generac PWRcell Inverter
General Information
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Operation
Owner’s Manual for Generac PWRCell Inverter 13
Section 3: Operation
Operation and User Interface
See Figure 3-1. Generac PWRcell is controlled through
the PWRcell inverter control panel. The inverter control
panel is used for adjusting system settings and for
interacting with devices.
•Use left and right arrows (A) to navigate between
pages.
•Press center button (B) on a device page to modify
device settings.
Figure 3-1. Inverter Control Panel
Home Screen
See Figure 3-2. The power flow display on the home
screen illustrates the flow of power in the system. As
power is generated, stored and consumed, animated
arrows indicate the flow and direction of power. System
AC and DC voltage levels are displayed near the center
of the screen. The current system mode is displayed at
the top of the screen.
Figure 3-2. Home Screen
Selecting System Modes
Once a system is installed, a system mode that best suits
the user’s needs must be set. Once set, the system
remains in that mode without needing to be changed.
NOTE: A system mode can be changed at any time.
To select a system mode:
1. See Figure 3-3. While viewing the home screen
press the center button.
Figure 3-3. Selecting System Modes (1 of 5)
2. See Figure 3-4. A list of system modes will be
displayed with the current mode marked with an
asterisk.
NOTE: The list of modes may not include all those
shown in Figure 3-4.
Figure 3-4. Selecting System Modes (2 of 5)
3. See Figure 3-5. Use the up and down arrows to
highlight the desired mode and press the center
button to select it.
REbus Inverter
Internet
Shutdown
(hold)
009894
B
A
009965
009965
Safety Shutdown
System Mode Menu
Self Supply
Clean Backup
< EXIT SCROLL > NEXT • SELECT
Grid Tie *
009966

Operation
14 Owner’s Manual for Generac PWRCell Inverter
Figure 3-5. Selecting System Modes (3 of 5)
4. Arrow right and press the center button to select
Confirm.
5. See Figure 3-6. Verify the mode listed at the top of
the home screen is the desired mode.
Figure 3-6. Selecting System Modes (5 of 5)
Device Pages
Each device connected to the system has its own device
page. The device page contains basic information about
the device, such as its power level and state.
•Use the left and right arrow keys to scroll through
device pages.
•Press the center button to access the main menu
for that device.
NOTE: See Figure 3-7. A Device Offline message
indicates the device is disconnected or has lost
communication with the inverter.
Figure 3-7. Device Offline
Enabling and Disabling Devices
NOTE: If a device has never been enabled, it remains
disabled until enabled by a user.
After a system shutdown, each REbus device must be
enabled by the user before the device will operate. If a
device is disabled, the device will remain in a disabled
state and will not resume operation until enabled by the
user.
Once enabled, if grid power is present the inverter will
create DC voltage, establishing the REbus nanogrid. All
devices connected to REbus will wake up and begin
communications.
To enable a device:
1. Use the right arrow key to scroll to the desired
device page.
2. See Figure 3-8. Verify the device status reads
Disabled.
Safety Shutdown
System Mode Menu
Clean Backup
< EXIT SCROLL > NEXT • SELECT
Grid Tie *
Self Supply
009967
009968
Photovoltaics
S2502
231.0kWh
294V
0W
device offline
Power:
PV Voltage:
E-total:
009969
(000600)
DANGER
Electrocution. Initiate a system-wide shutdown and turn the
PWRcell DC Disconnect Switch OFF on all connected
batteries before performing service. Failure to do so will
result in death, serious injury, or equipment and property
damage.
(000627a)
DANGER
Electrocution. Never enable any device during an
installation or while wires are exposed. Doing so
will result in death, serious injury, or equipment or
property damage.

Operation
Owner’s Manual for Generac PWRCell Inverter 15
Figure 3-8. Enabling and Disabling Devices (1 of 3)
3. Press the center button.
4. See Figure 3-9. Highlight Enable and press the
center button.
Figure 3-9. Enabling and Disabling Devices (2 of 3)
5. See Figure 3-10. Arrow right and press the center
button to select Confirm.
Figure 3-10. Enabling and Disabling Devices (3 of 3)
NOTE: Per UL1741, the PWRcell inverter may wait five
minutes or longer before beginning to export power after
the inverter has been enabled.
Mod. Settings Menu
Most REbus devices have user-adjustable parameters,
such as setpoints for charge, startup voltage, or PLM
channel. See Table 3-4 for available settings.
To access user-adjustable parameters:
1. Use the left and right arrows to navigate to the
desired device page.
2. See Figure 3-11. Highlight Mod. Settings and
press the center button to select
Figure 3-11. Internet Device Page
NOTE: After selecting Mod. Settings it may take a
moment for the settings to load.
3. See Figure 3-12. Use the up and down arrows to
scroll through available settings.
4. Highlight the desired setting and press the center
button to select.
5. Use the up and down arrow keys to adjust the
value of the setting.
NOTE: Press the center button to deselect a setting at
any time and resume scrolling.
Figure 3-12. Mod. Settings Menu (1 of 3)
6. To save the settings, highlight Commit and press
the center button.
Inverter
PWRcell 2P Inv.
2.4kWh
248V
0W
-02
Disabled
AC Power:
AC Voltage:
E-total:
009970
PWRcell 2P Inv. Menu
Mod. Settings
RCPn: 000100073212
< EXIT SCROLL > NEXT • SELECT
Enable
Calibrate CTs
009971
Enable
PWRcell 2P Inv. Menu
Mod. Settings
Calibrate CTs
RCPn: 00010003XXXX
< EXIT SCROLL > NEXT • SELECT
Enable
Cancel Confirm
009972
Disable
PWRcell 2P Inv. Menu
Mod. Settings
RCPn: 000100073212
< EXIT SCROLL > NEXT • SELECT
Calibrate CTs
010234
PLM_Channel:
TargMaxImprtP:
TargMinImprtP:
Cancel Save
1
off
off
EnaIslanding: on
009975

Operation
16 Owner’s Manual for Generac PWRCell Inverter
Table 3-4. Inverter Device Settings
Setpoint Range Default Description
PLM_Channel 0 - 12 1
Channel for REbus communications. All devices in a system must use the
same channel (except REbus Beacon). Do not set equipment to channel 0
unless performing Multiple Inverter System Commissioning Procedure.See
installation manual for more details.
TargMaxImprtP -30,000 to +30,000 0 Maximum Threshold for importing power before the battery will discharge
in Self-Supply Mode to offset.
TargMinImprtP -30,000 to +30,000 0 Minimum power import maintained by charging the battery from the grid in
Supply Mode.
EnaIslanding on or off on Allows system to island, providing backup power during a grid outage.
EnaExtTransfer on or off off Turn on if an external automatic transfer switch (ATS) has been installed to
operate with the Inverter.
ExtTransVolt 50.0 - 200.0 95 Minimum voltage from the utility that must be present for the inverter to
reconnect an ATS back to the grid.
ExtTransTime 1-360 Seconds 15 Length of time the inverter will wait to trigger an ATS to reconnect to the
utility upon sensing grid voltage return.
Export Override on / off off Formerly called Zero Export, this setting will inhibit the PWRcell system
from exporting power to the grid.
PLM_Disable on / off off This setting will disable the power line communications coming from the
inverter.
CalOverride on / off off Overrides inverter logic for automatic detection of included Generac cur-
rent transformers (CTs).
CTTurnsRatio 1,500 - 3,000 Turns 1,500 Allows a different turns ratio to be set for specific CTs.