Duracell D-HUB User manual

Model: D-HUB
INSTALLATION MANUAL
For use with the DURACELL PO ER CENTER 5KW

Revision History
Revision
Date
Status
Author
Comments
08/30/2022 Ian Grover
Released
01
05/01/2022 Initial
n/a
Ian Grover
02 04/05/2023 Released Ian Grover Removed TP-Link Kit

IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions for the DURACELL HUB as part of a complete home energy
storage system. The DURACELL Hub is a peripheral of the DURACELL PO ER CENTER 5K energy storage
system. The energy storage system will be referred to as the ESS throughout this manual.
CAUTION: Hazardous Voltages! This product contains hazardous voltage and energy that may be lethal. It
may only be installed by qualified personnel who have read this manual and are familiar with its operation and
hazards. The following safety procedures should be followed:
Only connect the DURACELL HUB to a compatible electrical service as defined in the model specifications.
Ensure proper electrical grounding in accordance with code requirements.
Ensure proper airflow path for active cooling.
Never operate system in a manner not described by this manual.
Only qualified personnel should service this product.
Ensure cover is securely fastened after installation is complete.
Do not attempt to operate this product if there is any physical evidence of damage to the enclosure or internal
components.
CAUTION! This product contains an AGM lead acid battery. This product must be stored indoors in an
environmentally conditioned location prior to installation, protected from rain and exposure to any hazardous
chemicals. Inspect the battery case prior to installation. Do not install and power the product if there appears
to be damage to the battery and contact your local product distributor.
Do not dispose of the system or any of the components within the cabinet. Batteries, electronics, cables, and
metal parts are recyclable. Consult your municipal waste management authority to determine required
methods of component recycling.
California Proposition 65
WARNIN ! This product can expose you to chemicals including bis (2-ethylhex-yl)phthalate, which is known to
the State of California to cause birth defects or other reproductive harm. For more information go to
https://www.p65warnings.ca.gov/.

Contents
1 INTRODUCTION .................................................................................................................... 1
1.1 ABOUT THIS MANUAL –SUPPORTING DOCUMENTS........................................................................................................1
1.2 GLOSSARY..............................................................................................................................................................1
1.3 INITIAL INSPECTION OF MATERIAL LIST .......................................................................................................................1
1.4 SPECIAL TOOLS &HARDWARE ..................................................................................................................................2
1.5 FUNCTIONAL OVERVIEW ...........................................................................................................................................2
1.5.1 Grid Connected Solar plus Storage ........................................................................................ 2
1.5.2 Backup Solar plus Storage ................................................................................................... 3
1.5.3 Backup Solar PV curtailment method: Frequency Shift Power Control (FSPC)............................... 3
1.5.4 Circuit and system sizing for 100 / 125 / 150 Amp electrical panels ............................................. 3
1.5.5 Circuit and system sizing for 200+ Amp electrical panels .......................................................... 3
1.5.6 Over-sized PV systems ....................................................................................................... 3
1.6 INTERNAL COMPONENT OVERVIEW ............................................................................................................................4
1.6.1: Energy management controller (EMC) ................................................................................. 4
2 INSTALLATION PLANNIN ....................................................................................................... 5
2.1 INSTALLATION CLEARANCES BETWEEN THE DURACELL HUB AND THE BATTERY SYSTEM ..............................................5
2.2 INSTALLATION CONDUIT PLAN –POWER AND COMMUNICATION CIRCUITS.........................................................................6
2.3 SLD -AC COUPLED PV SYSTEM WITH BACK-UP POWER OPERATION...........................................................................7
3 INSTALLATION INSTRUCTIONS ................................................................................................ 8
4 ELECTRICAL WIRIN INSTRUCTIONS ......................................................................................... 8
4.1 EMC CABLE CONNECTION .......................................................................................................................................8
4.2 AK1 CABLE CONNECTION.........................................................................................................................................8
4.3 AC POWER CONNECTIONS .......................................................................................................................................8
4.3.1 Phase Orientation in Split Phase 120/240 Systems ................................................................... 9
4.3.2 Main Electrical Panel Connection ......................................................................................... 9
4.3.3 Backup Panel Connection .................................................................................................. 10
4.3.4 ESS: PCS Grid Port Connection ........................................................................................... 10
4.3.5 ESS: PCS Load Port Connection .......................................................................................... 10
4.4 CTCONNECTIONS .................................................................................................................................................11
4.4.1 Main Electrical Panel CT Connections .................................................................................. 11
4.4.2 Solar PV CT Connection ..................................................................................................... 11
4.4.3 PCS CT Connections ......................................................................................................... 11
4.5 12V BACKUP BATTERY CONNECTION.......................................................................................................................11
5 OPERATION ........................................................................................................................ 12
5.1 EMC SELECTOR SWITCH ........................................................................................................................................12
5.2 PRE-STARTUP CHECKLIST....................................................................................................................................... 12
5.3 STARTUP ..............................................................................................................................................................12
5.4 POST-STARTUP CHECKLIST .....................................................................................................................................12
5.5 PERMISSION TO OPERATE CHECKLIST....................................................................................................................... 13
6 MAINTENANCE .................................................................................................................... 13
7 TROUBLESHOOTIN ............................................................................................................. 13
8 TECHNICAL DATA ............................................................................................................... 14
8.1 ELECTRICAL SPECIFICATIONS ..................................................................................................................................14
8.2WIRE AND TORQUE RATINGS ...................................................................................................................................14
APPENDIX A: ELECTRICAL BLOCK DIA RAM OF INTERNAL COMPONENTS ............................................ 15
APPENDIX B: MULTI-MODE TRANSFER / BYPASS RELAY OPERATION ................................................... 16
KX:DURACELL HUB BYPASS /TRANSFER RELAY......................................................................................................... 16
K3: PCS TRANSFER RELAY ..........................................................................................................................................16
K1: PCS ISLANDING RELAY .......................................................................................................................................... 17
PCS AND HUB RELAY STATE MAP..................................................................................................................................17
BACKUP SUPPLY INTERRUPTION PERIOD DURING GRID OUTAGE /RETURN TO GRID ..............................................................17
APPENDIX C: INTERNET CONNECTION OPTIONS ...........................................................................18
C.
1HARD-WIRED ETHERNET........................................................................................................................................18

1
1 Introduction
Throughout this manual, the following symbols will be used to highlight important information and procedures:
Symbol
Definition
Symbol
Definition
WARNIN ! A dangerous voltage or other
condition exists. Use extreme caution when
performing these tasks.
Function performed by energy
management system / controller.
CAUTION! This information is critical to the safe
installation and or operation of the product.
Follow these instructions closely.
NOTE: This statement is important.
Follow instructions closely.
1.1 About this manual – supporting documents
This manual is intended to be used by qualified service and installation personnel for the purposes of installation
and startup only. The DURACELL HUB energy management system & gateway requires installer administration and
device commissioning prior to operation of the ESS. Refer to the Fleet Installer Administration Guide and the
DURACELL HUB Install & Commission Quick Guide for further details.
This product is permanently wired to the home electrical service, and must be installed by a licensed electrician
only. This product is a power distribution peripheral intended to be operated with the ESS. Refer to the DURACELL
PO ER CENTER 5K Installation & Startup Manual for installation of the ESS.
Go to www.duracellpowercenter.com for a complete list of installer resource materials.
1.2 Glossary
1.3 Initial Inspection of Material List
The system components supplied with the
DURACELL HUB are shown below. Each
component should be inspected visually for any
damage that may have been caused by
shipment. If parts are missing or damaged,
please contact your local distributor.
Term Definition Term Definition
AC / DC Alternating Current / Direct Current NC/NO Normally Closed / Normally Open
AHJ Authority Having Jurisdiction NEC/CEC National (USA) Electric Code / Canadian Electric Code
ARC Auto Recovery Control PCS Power Control System (Inverter)
DC Direct Current PE (GND) Protective Earth
EMC Energy Management Controller PV Photo-Voltaic
EMS Energy Management System RF Radio Frequency
ESS Energy Storage System SOC State Of Charge (Battery)
LED Light Emitting Diode SOH State of Health (Battery)
Item Description
1 EMS-A DURACELL HUB
2 Current transformer – 200 Amp
3 Current transformer – 50 Amp
4 EMS to PCS RJ-45 cable
5 AK1 DURACELL HUB control cable
6 USB to Mini-USB service cable
(x2)
(x3)
2
3
4
6
5
1
EMS
Figure
1
: DURACELL HUB materials list.

2
1.4 Special Tools & Hardware
In addition to the standard tools required for enclosure mounting, the following tools should be readily available to
complete the installation.
•Drill and hole saw kit
•RJ-45 crimp tool and RJ-45 connectors
•all mounting hardware.
•#0 flat screwdriver.
•
1.5 Functional Overview
The DURACELL HUB is equipped to support an AC coupled solar plus storage installation with backup power to a
dedicated backup electrical panel. The DURACELL HUB is a power distribution center for the ESS, routing all AC power
between the main and backup electrical panels. In the event of a grid outage, the DURACELL HUB will be energized
by the ESS, which will island off the main electrical panel. As shown below, the PV inverter’s AC output is connected
to the backup panel to support solar charging of the battery during a grid outage.
Figure 2: DURACELL HUB with DURACELL PO ER CENTER 5K .
1.5.1 Grid Connected Solar plus
Storage
The DURACELL HUB routes power from the main
electrical panel to the backup panel through the ESS
Grid/Load transfer circuit when the grid is live and
the battery system is in service (normal operation).
The EMC commands the battery system to charge or
discharge the battery as demanded by the energy
management algorithm. In a self-consumption
algorithm, for example, the EMC calculates the
difference in total load vs. solar PV, and routes the
balance of power to/from the battery as needed.
hen the battery is full, PV power bypasses the
battery to grid/loads. hen the battery is at
minimum reserve, all home loads are supplied
entirely by the grid. The following diagram
outlines the power flow possibilities while grid
connected.
Note: The DURACELL HUB is equipped with an internal automatic bypass switch which provides uninterrupted
service to the backup electrical panel when the ESS is either not powered (installed but pending permission to
operate) or out of service.
PV
Inverter
PV panels
Grid
Load
power
Home
Internet
Service
CT
Main
Panel
Backup
Panel
Home loads
Home loads
to grid
PV
Inverter
PV panels
Grid
Load
Main
Panel
Backup
Panel
H
ome
loads
Home loads
Figure
3
: Grid connected solar plus storage.
communication
ethernet

3
1.5.2 Backup Solar plus Storage
During a grid outage, the DURACELL HUB isolates the battery
system and backup electrical panel from the grid. In this mode, the
EMC is in a monitoring state, with most control handed over to the
ESS. The ESS curtails PV when the battery is either full or exceeds
the charge limit of the battery. On low SOC, the battery system
goes into a standby state until either the solar resource or the grid
returns.
IMPORTANT! Shutting off the DURACELL HUB circuit breaker at the
main electrical panel will place the ESS into backup mode and
continue to energize the backup panel.
1.5.3 Backup Solar PV curtailment method:
Frequency Shift Power Control (FSPC)
During backup power operation of the ESS, PV curtailment is achieved by shifting the frequency up or down to trip
the PV inverter. This curtailment method, defined as frequency shift power control (FSPC), is required to prevent
solar from over-charging the battery. By default, the ESS will ramp up frequency to a PV trip range of 62.1 Hz, but
this is adjustable depending on the regulatory frequency trip limits within the jurisdiction.
IMPORTANT! PV inverters connected to the backup panel must have frequency trip settings programmed within the
following ranges: PV low frequency trip range: 57.0 to 59.3 Hz, PV high frequency trip range: 60.5 to 62.0 Hz.
If the PV inverter cannot be adjusted within the range specified, the PV inverter must not be connected to the backup
panel.
NOTE: The DURACELL HUB is not suitable for use in applications where the electric utility prohibits PV power export
to the grid. For non-export applications, consult your DURACELL PO ER CENTER 5K dealer for alternate EMS
panel solutions.
1.5.4 Circuit and system sizing for 100 / 125 / 150 Amp electrical panels
Line side tapping the main electrical panel is required for ESS installations where the electrical service rating is under
200 Amp. Refer to section 2.3, figure 11.
1.5.5 Circuit and system sizing for 200+ Amp electrical panels
The DURACELL HUB may be connected to a 200+ Amp electrical panel using a single 40A breaker. For this
configuration, the total solar PV output connected to the backup electrical panel will depend on the curtailment
features of the solar PV inverter. If the PV inverter is equipped with its own curtailment controls that can limit PV
output to 5k or less in backup mode, the maximum rating of the PV inverter connected to the DURACELL HUB is 7.6
k AC. For PV inverters without internal curtailment methods, the 5 k PV restriction applies. Regardless of PV
size, this configuration permits the DURACELL HUB EMS to limit continuous combined solar plus storage output to 7.6
k AC (32 Amp).
1.5.6 Over-sized PV systems
For installations with PV systems that are
larger than the DURACELL HUB and ESS can
accommodate, the PV inverters must be split
up such that the balance of PV is wired directly
to the main electrical panel.
NOTE: An additional CT must be added to the
main panel connected PV inverter.
PV
Inverter
Load
Home
loads
Backup
Panel
PV
Inverter
PV panels
Grid
Load
Main
Panel
Backup
Panel
Home
loads
Home loads
PV
Inverter
Excess
PV
PV panels
Figure 4: Backup solar plus storage.
Figure 5: Over-sized PV systems connected to main panel.
PV panels

4
1.6 Internal Component Overview
The DURACELL HUB is equipped the following components as identified in the diagram below:
Figure 6: DURACELL HUB internal component overview.
1.6.1: Energy management controller (EMC)
IMPORTANT! The device unique identifier (UID) & serial number (S/N) tag attached to the front of the EMC is required
to register the device to the cloud so that it may be monitored via the Fleet Installer monitoring system. Record this
information for online registration.
The EMC performs the following functions:
•Commands the battery system to charge and discharge as defined by the selected control algorithm.
•Monitors the home loads, solar PV, and battery power via on-board 8 channel power meter.
•Provides the Internet gateway to customer supplied internet router via wired Ethernet.
A 12V AGM UPS backup battery supplies uninterrupted power to the EMC.
Figure 7: EMC feature overview – rev1 EMC faceplate label.
Web config tool
Service port
(mini-USB)
8 channel
power meter
12V AG
Backup battery
Ethernet to
Internet router
(or to a Wi-Fi
range extender)

5
2 Installation Planning
Before installing the DURACELL HUB, read all instructions and warnings in this manual. The DURACELL HUB can be
installed in an indoor and outdoor non-corrosive environment (not marine environment). all mounting hardware
is not included.
CAUTION! All electrical installation work should be performed in accordance with local building and electrical
codes.
WARNIN ! Isolate the DURACELL HUB from all energy sources prior to electrical installation by means of
disconnects, breakers or connectors. Failure to properly isolate either AC or DC sources may result in serious injury
or death.
NOTE: Communication cables between the DURACELL HUB and the battery system are limited in length. The
DURACELL HUB should be installed within 2 ft of the battery system.
CAUTION! Do not install in direct sunlight.
2.1 Installation clearances between the DURACELL HUB and the battery system
The DURACELL HUB includes a 10 foot communication cable that connects the hub to the battery system. If the
installation is constrained such that the DURACELL HUB must be located greater than 24” from the battery system,
consult the DURACELL PO ER CENTER 5K Installation & Startup Manual for instructions on creating an extended
communication cable.
Figure 8: Installation clearances between the DURACELL HUB and the ESS.
Max: 24”
(600 mm)

6
2.2 Installation conduit plan – power and communication circuits
The following example outlines the conduit plan for power and communication circuits for a complete solar plus
storage system using the DURACELL HUB and the DURACELL PO ER CENTER 5K . (String PV inverter shown –
replace with equivalent AC combined micro-inverter output, where applicable).
Table 1: Circuit summary for a solar plus storage installation.
Conduit
Ref Circuit Definition
Conductor
(recommended) Circuit Protection
P1 ESS grid power 8/3 40 Amp
P2 ESS backup power 8/3 40 Amp
P3 Main panel power 8/3 40 Amp
P4 Backup panel 8/3
40 Amp feeder if total backup ccts exceed 40
Amp/240V rating
P5 Solar PV power 8/3 40 Amp
S1
EMS communication cable
3 meter patch cable included
CAT 5/6 STP -
S2 (x2) CT , 50 Amp 8 ft pigtail 18/2, 300V
-1
-
S3
AK1 Hub Control Signal cable
harness included , 10 ft 18/2, 300V -
S4 (x2) CT, 200 Amp 8ft pigtail 18/2, 300V
-1
-
S5 CT , 50 Amp 8 ft pigtail 18/2, 300V
-1
-
Note 1: Conductor type referenced where Hub is installed greater than 24” from the ESS. Signal wiring routed in
conduit with power must be 300V rated. For runs longer than 10 meters, signal separation from power is
recommended to minimize signal interference.
Disclaimer:
Manufacturer supplied components represented here are limited to the PCS/Battery, DURACELL HUB, and CTs for PV, battery, and
mains. All other materials and components represented are customer supplied. CEC/NEC electrical code compliance is the
responsibility of the designer and/or electrical permit holder. Source circuit disconnects for PV and ESS grid/load ports not shown.
CT home
CT 50A: (2x)
Figure 9: Installation conduit plan for a solar plus storage installation (base model shown).

7
2.3 SLD - AC Coupled PV System with Back-up Power Operation
The single line diagram shown below is a representation of a typical installation configured for utility interactive and
back-up power operation, with AC coupled PV connected to a backup panel. This drawing is a guideline only and is
not a substitute for a code compliant installation. All components required for a code compliant installation are the
responsibility of the licensed installer, including any additional circuit protection requirements not shown here.
NOTES
1 - The backup power bus must be electrically isolated from the main electrical bus. Do not
tap the neutral wires of the main and backup buses. Refer to the installation manual for
wiring details. Load circuits are shown for demonstration. Maximum number of circuits
determined by sub-panel rating. Loads connected to circuits must not exceed nominal
power ratings (continuous/surge) of the inverter.
2 – The battery system must be earth bonded to the building ground to meet lightning
protection requirements.
3 – The battery system load and grid ports are independently controlled circuits. Should the
electrical code require additional “line-of-sight” or dedicated disconnects, a separate
disconnect must be used for each of the grid and load ports. The disconnects and/or circuit
breakers must operate independently of each other, and rated for the branch circuit.
4 - CTs are equipped with 8 ft pigtails. Twisted pair extensions can be run up to 30 ft. CT
extensions should not be required if the DURACELL HUB is within 4 ft of the PCS.
5 – Ethernet connection between router and EMC is optional. EMC can communicate using
i-fi or cellular.
6 – PV cannot exceed 5k AC output in backup mode. PV systems larger than 5k AC must
have a self-curtailment mechanism (software or hardware) to ensure limit is within the 5k
AC rating. If curtailment means are not available, the balance of PV (if applicable) must
be routed directly to the main panel.
7. For electrical services rated less than 200A, the ESS system must be line side tapped as
shown in figure 11.
Disclaimer:
Manufacturer supplied components represented here are limited to the PCS/Battery, DURACELL HUB, and CTs for PV, battery, and
mains. All other materials and components represented are customer supplied. CEC/NEC electrical code compliance is the
responsibility of the designer and/or electrical permit holder.
HUB
ESS
Figure 10: Sample single line diagram of an AC coupled solar plus storage installation (base model shown).
to
HUB
Figure
11
: 100 Amp main panel line
side tap to the DURACELL HUB.

8
3 Installation Instructions
1. Mount the DURACELL HUB on the
wall using the 4 mounting screw
holes on the top and bottom
flanges. (Mounting hardware not
included).
2. Using the conduit plan in section
2.2, drill the knockout holes
required for the conduit runs on the
bottom face of the enclosure.
Constrain the drill area as shown.
3. Route all conduit as cabling as
required.
CAUTION! All knockout holes must be sealed to maintain the Type 3R environmental rating of the enclosure after
the installation is complete.
CAUTION! The restricted knockout area is near the DURACELL HUB circuitry, so extra care must be taken to avoid
internal components when the knockout holes are being drilled.
CAUTION! Ensure that the DURACELL HUB enclosure door is properly seated such that the gasket becomes
compressed when the door is securely closed.
4 Electrical Wiring Instructions
IMPORTANT! iring methods must be in accordance with local electrical codes. The installer is responsible for
ensuring that over-current protection is installed and sized appropriately for the AC circuits, in accordance with the
National Electrical Code, ANSI/NFPA 70, Canadian Electrical Code and local codes
The patch cables provided in section 4.1 and 4.2 below have pre-assembled connectors at both ends. It is strongly
recommended that these cables are pulled in conduit prior to the power cables.
CAUTION! Do not install cables if any wires appear damaged
or are not terminated improperly. Contact your distributor
for support.
4.1 EMC Cable Connection
1. Terminate the EMC CAT 5 patch cable in the RJ-45
port as shown.
NOTE: If a longer extension is required, shielded CAT 5/6 cable
must be used.
4.2 AK1 Cable Connection
1. Plug in the AK1 DURACELL HUB control cable
connector into the terminal block.
NOTE: If an AC source disconnect was installed between the
DURACELL HUB’s grid port and the ESS as described in section
2.4 of this manual, leave the AK1 terminal block unplugged
until the system has permission to operate.
4.3 AC Power Connections
All AC power connections to L1, L2, and Neutral are terminated
with a hinged pressure clamp connector. Observe the connector
termination instructions for the clamp connector as shown in
figure 15. Recommended strip length is 18 mm (11/16”).
Knockout area:
5” x 4” H
1.0
”
1.0
”
Restricted knockout area:
7” x 4” H
1.0
1.0
”
Figure 12: Recommended knock-out area.
Figure
14
: AK1 cable connection.
Figure 13: EMC cable connection to RJ-45 port.

9
IMPORTANT! Do not terminate fine stranded cable in the connector without the use of ferrules.
IMPORTANT! Do not operate this product if the hinge clamp does not close completely as shown. Improper
terminations can result in fire and/or permanent damage.
CAUTION! To reduce the risk of fire, connect only to a dedicated circuit provided with appropriate branch circuit
over-current protection in accordance with local electrical codes.
WARNIN ! Improper connection of the wiring panel may result in equipment damage and cause personal injury.
Disconnect all AC and DC Sources prior to installation.
CAUTION! The AC grid and load ports are independent circuits, controlled internally by an automatic bypass and
transfer switch. Each port must be connected to electrically isolated panels. Tapping line or neutral wires from
the main electrical panel to the backup panel will result in permanent damage to the product.
4.3.1 Phase Orientation in Split Phase 120/240
Systems
The EMC derives power measurement at the main service, the
solar PV inverter AC output, and the ESS. Consistent phase
voltage orientation through the entire installation is critical to
proper control of the system. The initial selection of the phase
voltage defined as L1 is established by the placement of the CT
referenced as CT1 on the main feeder to the panel. To ensure the
phase wiring to the DURACELL HUB maintains consistent polarity,
measure the AC voltage between L1 of the main feeder and the
Grid terminals of the DURACELL HUB. The pole that measures 0.0
VAC is defined herein as L1 for the AC wiring instructions that
follow.
4.3.2 Main Electrical Panel Connection
Route “AC Grid” L1, L2, Neutral, and Ground to a
dedicated 2-pole backfeed rated breaker in the main
electrical panel.
L1 L2
N
To main panel
GND
Main panel
L1
HUB
L1
L1 L2 L1 L2 N
To backup panel
To main panel
PCS load port
GND
L2
L1
L2
L1 PCS grid port
Neutral bus
(common)
PCS Ports
N
Neutral bus (common)
GND
PCS
Figure 15: AC power wiring.
Figure 16: Main panel connection.

10
4.3.3 Backup Panel Connection
Route “AC Load” L1, L2, Neutral, and Ground to a
dedicated 2-pole backfeed rated breaker in the
backup electrical panel.
4.3.4 ESS: PCS Grid Port Connection
Route “AC_Grid_PCS” L1, L2, Neutral, and
Ground to the PCS Grid port inside the ESS.
4.3.5 ESS: PCS Load Port Connection
Route “AC_Load_PCS” L1, L2, and Neutral to the
PCS Load port inside the ESS.
L1 L2
N
To backup panel
GND
PCS
L2
L1
N GND
PCS
L2
L1
N
Figure 18
: DURACELL HUB to PCS grid port connection.
Figure
19
: DURACELL HUB to PCS
backup port connection.
Figure 17: Backup panel connection.

11
4.4 CT Connections
IMPORTANT! The energy management system relies on
the correct CT orientation for each of the measured
loads, PV, and ESS. Follow these instructions with care.
NOTE: white= [+] , black= [-] for all CT models.
IMPORTANT! Use the CT’s supplied with the system.
Consult technical support for approved alternatives of
the same type and scalar value as required.
4.4.1 Main Electrical Panel CT
Connections
CT direction faces into the home loads (away from the
utility meter). Current measurement is positive when
load exceeds generation.
1. Terminate CT1 at the L1 feeder of the main
electrical panel.
2. Terminate CT2 at the L2 feeder of the main
electrical panel.
4.4.2 Solar PV CT Connection
CT direction faces into the solar PV inverter.
Current measurement is negative when PV is
generating.
1. Terminate CT5 at the L1 input of the solar circuit
within the backup electrical panel.
4.4.3 PCS CT Connections
CT direction faces into the ESS.
Current measurement is positive when battery is charging and negative when discharging.
1. Terminate CT7 at the X1 power wire of the PCS.
2. Terminate CT8 at the X2 power wire of the PCS.
4.5 12V Backup Battery Connection
IMPORTANT! Do not complete this connection until the
customer receives permission to operate the system, and
the main panel DURACELL HUB breaker is ON. The EMC will
be powered when the 12V battery is connected. Failure to
comply with this instruction may cause irreversible damage
to the battery due to battery drainage without a charge
source.
1. Terminate the positive wire on the AGM battery.
Figure 20
: CT connections for main, PV, and PCS circuits.
Figure
21
: Connecting the AGM battery after
permission to operate.

12
5 Operation
The EMC inside the DURACELL HUB is commissioned using a web
browser. Refer to the DURACELL HUB Install & Commission Quick
Guide for complete instructions on setup for the DURACELL PO ER
CENTER 5K . The operation instructions within this manual are
limited to the power up and commissioning test sequence of the
DURACELL HUB only.
5.1 EMC selector switch
Confirm that the EMC selector switch is in the position [B].
5.2 Pre-startup checklist
The following is a recommended quality inspection checklist prior to power up of the system.
Status
(√ )
Inspection
Ref
erence
AC power terminal clamps closed.
F
igure 15
EM
S
selector switch set to position
B
.
Figure 2
2
Ground continuity test
–
inspect and test ground continuity between the
DURACELL HUB and ESS.
5.3 Startup
IMPORTANT! The DURACELL HUB must be commissioned as part of the ESS. The startup procedure provided below
presumes that the PCS contained within the ESS is powered from the battery (DC source), and that the PCS is currently
displaying a valid SOC range and is operating in sleep/standby mode. Refer to the startup sequence of the DURACELL
PO ER CENTER 5K Installation & Startup Manual for instructions on startup (turning on DC source only). If AC
disconnects or the optional breaker kit has been installed between the PCS grid / load ports and the battery system,
leave them in the OFF position until the power up of the hub has been completed.
1. Turn ON the DURACELL HUB breaker in the main panel.
Powering up the DURACELL HUB will supply power to the on-board EMC. The red and green lights on the bottom of
the EMC will flash for approximately 30 seconds, indicating initialization of the EMC. Following initialization, the
lights will remain solid.
CAUTION! Following initial power up of the ESS, shutting OFF the DURACELL HUB breaker at the main electrical panel
will automatically engage the ESS backup power source. The Hub will remain energized at the PCS Load and Load
ports while the ESS is in backup mode.
5.4 Post-startup checklist
The following is a recommended quality inspection checklist following power up of the system.
Status
(√ )
Inspection
Reference
EMC power up status: Green/Red LEDs flashing up to 30 seconds, then solid
.
Figure 22
Measure AC voltage at the
AC_G
rid
_PCS
port. (L1
-
N, L2
-
N
)
Figure 19
Measure AC voltage at the
AC_L
oad
_PCS
port. (L1
-
N, L2
-
N
Figure 20
Measure AC voltage at the load (backup panel connection) port. (L1
-
N, L2
-
N)
Figure 18
T
est
the
DURACELL HUB
automatic
bypass switch
:
(start with AK1 relay connected).
1. Switch DURACELL HUB breaker at the main panel to the off position.
2. Switch the feeder breaker of the backup panel to the off position. ait 4 seconds
for the ESS to transition the PCS into Offgrid mode.
3. Measure voltages (L1-N, L2-N) at the Load terminals of the Hub (~120VAC).
4. Pull the AK1 terminal (will switch the automatic bypass switch off)
5. Measure the voltages (L1-N, L2-N) at the Load terminals of the Hub (0 VAC).
6. Reconnect the AK1 terminal (after permission to operate (see sec. 5.5)
Figure 14
Figure 18
Figure 14
Figure 18
Figure 14
EMS
B
Figure 22: EMS selector switch.

13
5.5 Permission to operate checklist
The following is a recommended quality inspection checklist following approval by AHJ inspector to operate the
energy storage system.
Status
(√ )
Inspection
Reference
12V battery positive lead connection to the lead acid battery completed.
Figure 22
AK1 relay connection completed.
Figure 14
6 Maintenance
The DURACELL HUB is a maintenance free product. Inspect the enclosure ventilator annually to ensure it is free from
obstruction. For heavy soiling use a soft, dry brush to clean. Do not use any solvents, scouring, or corrosive materials
to clean the unit. Never remove or unplug connections or plugs during cleaning.
7 Troubleshooting
The following is a troubleshooting guide for the DURACELL HUB. Refer to the DURACELL PO ER CENTER 5K
Installation & Startup Manual for troubleshooting of the ESS.
Mode
Condition
Check
Grid connected No power to DURACELL HUB and
backup panel. Check DURACELL HUB breaker circuit at the main panel.
Grid connected No PV power output Check PV breaker in the backup panel.
Commissioning /
Grid connected
Battery does not charge when PV
is operating
1. Check CT configuration. PV measurement is negative when
operating.
2. Check battery SOC (battery does not charge when full).
3. EMS operating in solar self-consumption mode, and home loads
are greater than PV.
Grid connected &
Backup
Monitoring system not displaying
information in web portal. Check internet connection. Check power (Green LED) on EMC panel.
Backup (grid
outage) No power to backup loads
Check status of the ESS on the front of the PCS panel. Refer to the
DURACELL PO ER CENTER 5K Installation & Startup Manual for
more details.

14
8 Technical Data
8.1 Electrical specifications
NOTE: About these ratings - The DURACELL HUB is a peripheral component of the DURACELL PO ER CENTER 5K . It is a power
distribution center with an on-board energy management system. As such, this product is defined under the category of
Interconnection System Equipment (ISE) for use in utility interactive and/or stand-alone power systems under the scope of the
UL1741 Standard, and is intended to be operated in parallel with an electric power system (EPS) to supply power to common loads.
The DURACELL HUB as a standalone device does not provide grid-interactive functionality. here necessary, the ratings included
below are listed both as a standalone product, as well as in conjunction with the Standard for Interconnecting Distributed Resources
ith Electric Power Systems, IEEE 1547, and the Standard for Conformance Test Procedures for Equipment Interconnecting
Distributed Resources with Electric Power Systems, IEEE 1547.1.
AC ratings – Power distrubution circuits
Nominal Grid voltage
240V/120V split phase
Nominal Grid frequency
60 Hz
Maximum continuous operating current (or Rated
current), AC
40.0 Amps
Maximum continuous operating power (or Rated
power), VA
9600 VA
Maximum AC fault current and duration (short
circuit)
14.0 Apk, 2.5 Arms (duration 63.5 ms)
AC connections, number
-
type
4
–
Grid, Load, PCS Grid, PCS Load
AC voltage operating range
Max: 100
to 264 Vac
.
Note: UL 1741SA compliant operating limits are
determined by the D-5k PCS configuration settings
AC frequency operating range
Max:
47 to 63 Hz
.
Note:
UL1741
SA
compliant operating limits are
determined by the D-5k PCS configuration settings
Maximum output overcurrent rating, grid & backup
connection
40
.0
Amps
Protective Class (I, II, or III) Class I
Over-Voltage Category (OVC I, II, III, or IV) OVC III
Pollution Degree 3
Lightning protection
IEEE 62.41.2, location
category B, low exposure
eneral data
idth
x height x depth
15.3” x 17.3” x 6.7”
(389 x 440 x 170 mm)
eight
23 lbs (10.5 kg)
Protection type
Type 3R
Ambient temperature, relative humidity, altitude
-
20
°
C to +50
°
C, 95%, 2000 m
Cooling method
Natural c
onvection
Installation type
all
-
mount (upright)
Enclosure material
Halogen free, self extinguishing fiberglass reinforced polyester
For use only with
the
DURACELL PO ER CENTER 5K
8.2 ire and torque ratings
Use solid copper only, 90 °C or higher rating
PCS (AC) # conductors AW (min to max) Torque
AC grid, load 3 conductor + PE 10 A G to 6 A G Push-lock, spring cage
AC PCS grid, PCS load 3 conductor + PE 10 A G to 6 A G Push-lock, spring cage
round Lug 1 conductor 10 A G to 6 A G 15.9 in-lbs
Optional breakers 2 pole 10 A G to 6 A G 17.7 in-lbs

15
Appendix A: Electrical Block Diagram of Internal Components
The following reference diagram outlines the internal wiring of the DURACELL HUB.
Reference
P/N
Title
Notes
A1
801003652
Voltage Sense Cable
120VAC L1 to N power meter reference
B1
801003644
Backup Battery Cable
12V AGM battery power
B2
801003650
EMS
-
A 12V
-
24V Power Cable
12V UPS power for EMC
C1 801003658 Comm Cable EMC to PCS internal communication patch cable
Ethernet connection to EMC AN port
B3 801003650 EMS A 24V Power Cable 24V Power Cable

16
Appendix B: Multi-mode transfer / bypass relay operation
The DURACELL HUB and PCS within the DURACELL PO ER CENTER 5K provide fully automated multi-mode
operation, including utility interactive and backup (off-grid) operating modes. The diagram below highlights the
three main relay controls used to transfer the backup panel supply source and island the PCS to a micro-grid during
a grid outage. The battery portion of the DURACELL PO ER CENTER 5K is not shown.
Note: while the EMS is responsible for monitoring PCS states and controlling the battery discharge / charge rates,
the PCS is responsible for the relay controls, and thus does not rely on EMS communication for transfer of the
backup panel source.
Figure 24: DURACELL HUB and PCS relay protection definitions in an AC coupled solar plus storage installations.
There are three main protection relays within the complete system, defined below, all of which have internal fail-
safe fault verification circuitry to prevent an unsynchronized PCS load to grid output connection.
Kx: DURACELL HUB bypass / transfer relay
The DURACELL HUB bypass / transfer relay ensures the backup panel is connected to the main panel with or without
an operating ESS. hen standalone, the Kx relay bypasses the energy storage system to power the backup panel
from the main supply. It remains in the NC or bypass state until powered up with the ESS initialized and ready for
control. Once the energy storage system’s PCS is in a “ready” mode, the PCS will take over control of the backup
supply source by transferring Kx to NO, and closing K3 for an uninterrupted transfer. Kx will revert to an NC state
with or without a valid grid if the PCS reports a critical service state which prevents it from safely operating the K3
transfer relay.
Fail-safe: Critical failure of the Kx relay will prevent PCS operation and will result in loss of power to the backup
panel.
K3: PCS transfer relay
This relay operates with Kx as defined above when the ESS is in a “ready” state. See the table below for a complete
list of PCS states. This relay opens upon a grid outage to island the backup panel from the main panel. This relay
acts as the PCS grid timing / synchronization grid connect relay when the grid supply returns from an outage,
allowing seamless connection of the battery system and the backup panel circuits to the grid.
Fail-safe: Critical failure of the K3 relay will prevent operation of the PCS, but will allow the backup panel to be
supplied by the main panel via the DURACELL HUB.