HOMEGRID Stack'd Series User manual

Stack’d Series
Reference Manual

Stack’d Series HOMEGRID Technical
Rev 00
07/19/2021

Stack’d Series HOMEGRID Technical
Table of Contents
1. Safety Precautions...........................................................................................................1
1.1. General warnings.............................................................................................................1
1.2. Charge and discharge warnings.......................................................................................2
1.3. Transportation warnings..................................................................................................3
1.4. Disposal of lithium batteries ...........................................................................................3
1.5. Before Connecting...........................................................................................................3
1.6. In Using...........................................................................................................................4
2. Introduction.....................................................................................................................5
2.1. Lithium iron phosphate battery .......................................................................................5
2.2. Stack’d Series Features ...................................................................................................5
2.3. Specifications ..................................................................................................................6
2.4. Equipment Interface Instruction......................................................................................7
2.5. Sleep and Wake up........................................................................................................14
2.5.1 Sleep........................................................................................................................14
2.5.2Wake up....................................................................................................................14
2.6. Forced discharge mode..................................................................................................14
3. How to match communication with inverter.................................................................15
3.1. Supported brands...........................................................................................................15
3.2. Inverter matching list ....................................................................................................15
3.3. Connection with inverter...............................................................................................16
4.Safe handling of lithium batteries Guide...............................................................................17
4.1. Schematic Diagram of Solution ....................................................................................17
4.2. Familiar with system.....................................................................................................17
4.3. Precautions before installation......................................................................................17
4.4. Tools..............................................................................................................................18
4.5. Safety Gear....................................................................................................................18
5.Installation.............................................................................................................................19
5.1. Package Items................................................................................................................19
5.2. Installation Location......................................................................................................19
5.3. Parallel Installation........................................................................................................20
6.Trouble Shooting Steps.........................................................................................................23
6.1. Problem determination based on...................................................................................23
6.2. Preliminary determination steps....................................................................................23
7.3.The battery cannot be charged or discharged.................................................................23
7.Storage,Transportation and Emergency Situations...............................................................24
7.1. Storage...........................................................................................................................24
7.2. Transportation ...............................................................................................................24
7.3. Emergency Situations....................................................................................................24

Stack’d Series HOMEGRID Technical
Page 1 Chapter 1: Safety Precautions
1. Safety Precautions
It is very important and necessary to read the user manual carefully before installing or using
the battery. Failure to do so, or to follow any of the instructions or warnings in this document,
can result in electrical shock, serious injury, or death, or can damage battery, potentially
rendering it inoperable.
1.1. General warnings
Any uncovered battery material such as electrolyte or powder on the skin or in the
eyes must be flushed with plenty of clean water immediately. Then seek medical
assistance. Spillages on clothing should be rinsed out with water.
Explosion and fire hazard. Terminals of the Li-ion Battery are always alive;
therefore, do not place items or tools on the Li-ion Battery. Avoid short circuits, too
deep discharges, and too high charge currents. Use insulated tools. Do not wear any
metallic items such as watches, bracelets, etc. In case of fire; you must use a type D,
foam or CO2 fire extinguisher.
Do not open or dismantle the battery. Electrolyte is very corrosive. In normal
working conditions contact with the electrolyte is impossible. If the battery
casing is damaged do not touch the exposed electrolyte or powder because it
is corrosive.
Observe these instructions and keep them located near the Li-ion Battery for
future reference.
For more information about this product, please visit the official website:
http://www.homegridenergy.com
Work on a Li-ion Battery should be carried out by qualified personnel only.
While working on the Li-ion Battery wear protective eyeglasses and clothing.
Li-ion batteries are heavy. If involved in an accident they can become a
projectile! Ensure adequate and secure mounting and always use suitable
handling equipment for transportation.
Handle with care because a Li-ion battery is sensitive to mechanical shock.
Do not expose cable outside, all the battery terminals must be disconnected
for maintenance
.
Do not place in a children or pet touchable area.
Do not use cleaning solvents to clean the battery.

Stack’d Series HOMEGRID Technical
Page 2 Chapter 1: Safety Precautions
1.2. Charge and discharge warnings
If the battery is stored for long
period of
time, it is required to
be
charge
d
every six
months, and the SOC should be no less than 90%.
Use only with a HOMEGRID approved BMS.
If charged after the Lithium Battery was discharged below the “Discharge cut-off
voltage”, or when the Lithium Battery is damaged or overcharged, the Lithium
Battery can release a harmful mixture of gasses such as phosphate.
The temperature range over which the battery can be charged is 0°C to 45°C.
Charging the battery at temperatures outside this range may cause severe damage to
the battery or reduce battery life expectancy.
The temperature range over which the battery can be discharged is -10°C to 55°C.
Discharging the battery at temperatures outside this range may cause severe damage
to the battery or reduce battery life expectancy.
Do not drop, deform, impact, cut or spear the battery with a sharp object.
Do not wet the battery and avoid of direct sunlight.
Do not use a damaged battery.
Please contact the supplier within 24 hours if there is something abnormal.
Do not expose the battery to flammable or harsh chemicals or vapors.
Do not paint any part of the battery; including internal or external parts
components
.
Battery needs to be recharged within 12 hours, after fully discharged.
Do not connect battery with PV solar wiring directly.
It is prohibited to insert any foreign object into any part of battery.
Any warranty claims are excluded for direct or indirect damage due to items above.

Stack’d Series HOMEGRID Technical
Page 3 Chapter 1: Safety Precautions
1.3. Transportation warnings
NOTE ：
●Batteries are tested according to UN Handbook of Tests and Criteria, part III, sub section 38.3
(ST/SG/AC.10/11/Rev.5).
●For transport, the batteries belong to the category UN3480, Class 9, Packaging Group II and have to be
transported according to this regulation. This means that for land and sea transport (ADR, RID & IMDG)
they have to be packed according to packaging instruction P903 and for air transport (IATA) according to
packaging instruction P965. The original packaging complies with these instructions.
1.4. Disposal of lithium batteries
1.5. Before Connecting
◆After unpacking, please check product and packing list first, if product is damaged or parts
are missing, please contact the local retailer or manufacturer;
◆Before installation, be sure to cut off the grid power at the inverter and make sure the battery
is in the OFF mode;
◆Wiring must be correct, do not mistake the positive and negative cables, and ensure no short
circuit with any external device or object;
◆It is prohibited to connect the battery and AC power directly;
◆The embedded BMS in the battery is designed for 48VDC, please DO NOT connect the
battery in series;
◆Battery system must be well grounded and the resistance must be less than 1ohm;
◆Make sure the grounding connection is set correctly before operation.
The battery must be transported in its original or equivalent package and in an upright
position. If the battery is in its package, use soft slings to avoid damage.
Do not stand below a battery when it is hoisted.
Never lift the battery at the terminals or the BMS communication cables, only lift the
battery at the
handles.
Batteries marked with the recycling symbol must be processed via a recognized
recycling agency. By agreement, they may be returned to the manufacturer.
Batteries must not be mixed with domestic or industrial waste.
Do not throw a battery into fire.

Stack’d Series HOMEGRID Technical
Page 4 Chapter 1: Safety Precautions
◆Ensure the electrical parameters of the battery system are compatible to all related equipment;
◆Keep the battery away from water and fire.
1.6. In Using
◆If the battery system needs to be moved or repaired, the power must be cut off at the inverter
system and the battery must be completely shutdown;
◆It is prohibited to connect the battery with any different type of battery.
◆It is prohibited to connect the batteries with faulty or incompatible inverters；
◆It is prohibited to disassemble the battery (QC tab removed or damaged);
◆In case of fire, only dry powder fire extinguisher can be used, liquid fire extinguishers are
prohibited;
◆Please do not open, repair or disassemble the battery except trained technicians from
HOMEGRID or authorized by HOMEGRID. We do not undertake any consequences or related
responsibility which, because of violation of safety operation, or violation of design, production
and equipment safety standards.

Stack’d Series HOMEGRID Technical
Page 5 Chapter 2: Introduction
2. Introduction
The Stack’d Series lithium iron phosphate battery is an energy storage product developed and
produced by HOMEGRID, it can be used to support reliable power for various types of
equipment and systems. The Stack’d Series is especially suitable for applications of high power,
limited installation space, and restricted load-bearing and long cycle life.
The Stack’d Series has a built-in BMS battery management system, which can manage and
monitor cell’s information including voltage, current and temperature. What’s more, the BMS
can help extend the cycle life by balancing cells during charging and discharging.
Multiple batteriy stacks are allowed to be connected in parallel to expand capacity and power
to meet the requirements of longer power supporting duration and higher power consumption.
2.1. Lithium iron phosphate battery
The lithium iron phosphate battery (LiFePO4 or LFP) is the safest of the mainstream lithium
battery types. A single LFP cell has a nominal voltage of 3.2V. A 51.2V LFP battery consists
of 16 cells connected in series.
LFP is the chemistry of choice for very demanding applications. Some of its features are:
◆Rugged - It can operate in deficit mode during long periods of time.
◆High round trip efficiency.
◆High energy density - More capacity with less weight and volume.
◆High charge and discharge currents - Fast charges and discharges are possible.
◆Flexible charge voltages.
The lithium iron phosphate battery is therefore the chemistry of choice for a range of very
demanding applications.
2.2. Stack’d Series Features
◆The whole stack and each module is non-toxic, pollution-free and environment-friendly;
◆Cathode material is made from LiFePO4 with safety performance and long cycle life;
◆Battery management system (BMS) has protection functions including over-discharge, over-
charge, and over-current and high/low temperature;
◆The system can automatically manage charge and discharge state and balance current and
voltage of each cell;
◆Flexible configuration, multiple battery modules can be stacked for expanding output and
Capacity.
◆Adopted self-cooling mode efficiently reduces any system noise;
◆The module has less self-discharge, up to 6 months without charging on a shelf, no memory
effect, with excellent performance of shallow charge and discharge;
◆Working temperature range is from -10 to 55℃(14F-131F) , (Charging 0~45℃(32-113F);
discharging -10~55℃(14F-131F) )with excellent discharge performance and cycle life;
◆Small volume, light weight, plug-in embedded design modules, are easy to install and
maintain;

Stack’d Series HOMEGRID Technical
Page 6 Chapter 2: Introduction
2.3. Specifications
Figure 2.1.Overall system diagram
No. Items Parameters
1 Model SS*-LFP***00-2A01
2 Main Controller Module SS-MC100-200M2
3 Battery Module Type SS-FS48100-16OSJ1
4 Battery Module Chemistry LiFePO4
5 Battery Module QTY* 2 3 4 5 6 7 8
6 Nominal Capacity(Ah) 200 300 400 500 600 700 800
7 Nominal Energy(kWh)*** 9.60 14.4 19.2 24.0 28.8 33.6 38.4
8 Voltage
Nominal(V) 48.0
Recommend
Charging(V) 52.5
Max.
Charging(V) 53.5
Discharge Cut-
off(V) 44.0
9 Current
Max.
Charging(A) 125 200 300 300 300 300 300
Max.
Discharging(A) 125 200 300 300 300 300 300
Peak for 10s(A) 175 250 350 350 350 350 350
10 Weight (Approx.) 230lbs 325lbs 420lbs 515lbs 610lbs 705lbs 800lbs
11 Dimensions
(H*W=29”*D=15.75”)
24.2” 29.4 35.2” 41” 46.8” 52.6” 58.4”
12 Communication RS485, CAN
13 Cycle Life 4000 times@80%DOD
14 Designed Calendar Life ≥10 years
15 Safety Function Over-charge, Over-discharge, Over-current, Low/High-temperature, Low-
voltage, Short-circuit Protections
16 Parallel Capability Maximum 10 Stacks (Recommended 6 Stacks)

Stack’d Series HOMEGRID Technical
Page 7 Chapter 2: Introduction
2.4. Equipment Interface Instruction
Figure 2.2.Main controller module positive
Figure 2.3. Interface definition of main controller module
No. Instructions No. Instructions
1 Address Dial Switch 8 Reserve
2 Inverter CAN /RS485communication port 9 Reserve
3 Reserve 10 Parallel communication port B
4 Inverter CAN communication port 11 Parallel communication port A
5 Inverter RS485communication port 12 Charge and discharge positive electrode
6 CAN upgrade communication port 13 Charge and discharge negative electrode
7 RS232 communication interface 14
No. Instructions NO. Instructions
1 Display screen 2 Power switch
3 Status code
8
9
10
11
4
5
6
7
2
3
1
12
13
1
2
3

Stack’d Series HOMEGRID Technical
Page 8 Chapter 2: Introduction
Display screen
Power switch: turn on/off the input and output of the whole system.
Display screen: the interface can observe the operation status information SOC, SOH,
charging and discharging power, alarm fault indication, charging and discharging status
display and system status indication of the whole system.
Status code: When the system status code is displayed as protection information, only the
value will be displayed. When the system status code is displayed as fault information, err and
fault value will be displayed. The definition of the alarm is shown in the table below：
numerical value Alarm indication numerical value Alarm indication
000 No breakdown 009 Low discharge
temperature
001 Over voltage
protection 011 High ambient temperature
002 Low voltage
protection 012 Excessive differential pressure
003 Charging over current
protection 013 Discharge circuit failure
004 Discharge over current
protection 014 Charging circuit fault
005 Short circuit protection 015 Cell failure
006 Charging high
temperature 016 NTC failure
007 High discharge
temperature 017 Voltage acquisition fault
008 Low charging
temperature
NOTE:
●When the system is charged, the display streamline gathers in the middle, and when it is discharged, the display
streamline disperses to both sides
Dial switch: 4-digit dial switch, address "0" and "1", as shown in the figure.
After setting, you need to restart the system and activate it.
When the system stacks are in parallel, the communication between each stack is required. Both
master and slave stacks need a hardware address configuration, and the hardware address can
be set through the dial switch on the main board. The definition of the switch is shown in the
table below.
Power switch
Status code
Master address dial switch

Stack’d Series HOMEGRID Technical
Page 9 Chapter 2: Introduction
Address
Coding
Dial Code Switch
Position Definition
#1 #2 #3 #4
1 ON OFF OFF OFF The host stack can monitor the operation of other stack systems
by setting the main switch posistion
2 OFF ON OFF OFF Set to the slave stack 2
3 ON ON OFF OFF Set to the slave stack 3
4 OFF OFF ON OFF Set to the slave stack 4
5 OFF ON ON OFF Set to the slave stack 5
6 ON OFF ON OFF Set to the slave stack 6
7 ON ON ON OFF Set to the slave stack 7
8 OFF OFF OFF ON Set to the slave stack 8
9 ON OFF OFF ON Set to the slave stack 9
10 OFF ON OFF ON Set to the slave stack 10
Front panel CAN / RS485 communication port: Rear panel Can / RS485 communication port:
(RJ45 port) follows can protocol and RS485 protocol. For the output system information, the
system master uses this interface to communicate with External inverter PC and other
equipment.
Port definitions RJ45 Pin Function
1 RS485-B
2 RS485-A
3 RS485 -GND
4 CAN-L
5 CAN-H
6 CAN -GND
RS232 communication port: (RJ11 port) comply with RS232 protocol (baud rate: 9600), for
manufacturers or professional engineers debugging or service.
Inverter CAN/RS485 communication port
RS232 communication port
1
2
3
4
5
6

Stack’d Series HOMEGRID Technical
Page 10 Chapter 2: Introduction
Port definitions RJ11 Pin Function
1 NC(NO connect)
2 NC(NO connect)
3 RS232-GND
4 RS232-TX
5 RS232-RX
6 RS232-GND
7 NC(NO connect)
8 NC(NO connect)
COM communication port: Connect the monitoring host controller to query the data and
monitor the running status of the system.
Port definitions RJ45 Pin Function
1 RS485-B
2 RS485-A
3 CAN -GND
4 RS485-GND
5 RS485-GND
6 CAN -GND
7 CAN-L
8 CAN-H
Rear panel RS485 communication port: (RJ45 port) follows can protocol and RS485 protocol.
For the output system information, the system master uses this interface to communicate with
External inverter PC and other equipment.
COM communication port
Inverter RS485 communication port

Stack’d Series HOMEGRID Technical
Page 11 Chapter 2: Introduction
Port definitions RJ45 Pin Function
1 RS485-B
2 RS485-A
3 RS485-GND
4 NC(NO connect)
5 NC(NO connect)
6 RS485-GND
7 RS485-B
8 RS485-A
Rear panel CAN communication port: (RJ45 port) follows can protocol and RS485 protocol.
For the output system information, the system master uses this interface to communicate with
External inverter PC and other equipment.
Port definitions RJ45 Pin Function
1 CAN-H
2 CAN-L
3 CAN -GND
4 CAN-H
5 CAN-L
6 CAN -GND
7 CAN-H
8 CAN-L
Link A / B communication port: the definition of link a and B on the rear panel of the
interface main controller module is the same. RS485 interface is used for parallel
communication between the main controller modules, and up to 15 devices can be connected
in parallel.
Port definitions RJ45 Pin Function
1 RS485-B
2 RS485-A
3 RS485-GND
4 NC(NO connect)
5 NC(NO connect)
6 RS485-GND
7 RS485-A
Inverter CAN communication port
Rear panel Link A / Link B communication port

Stack’d Series HOMEGRID Technical
Page 12 Chapter 2: Introduction
8 RS485-B
Figure 2.4. Battery module interface definition
Power switch: turn on / off the input and output of the whole battery module.
RS232 communication port: (RJ11 port) comply with RS232 protocol (baud rate: 9600), for
manufacturers or professional engineers debugging or service.
Port definitions RJ11 Pin Function
1 NC
2 RS232-GND
3 RS232-TX
4 RS232-RX
5 RS232-GND
6 NC
ADD Switch: 6 ADD switches, “0”and “1”, refer to picture right. The
settings will be active only after restart the battery.
When the battery communicates with the inverter, the address of the battery pack must be set
to 1, and the address of the parallel slave should be greater than 1.
No. Instructions NO. Instructions
1 Address Dial Switch 2 RS232 communication interface
3 Power switch
Power switch
RS232 communication port
Address dial switch
123

Stack’d Series HOMEGRID Technical
Page 13 Chapter 2: Introduction
When the battery module is connected in parallel, cascading communication is required.
Hardware address configuration is required for both the master module and the slave module,
and the hardware address can be set by the dial switch on the board. The definition of the switch
refers to the table below.
Address
Coding Dial Code Switch Position Definition
#1 #2 #3 #4 #5 #6
1 ON OFF OFF OFF OFF OFF Set the master module, and the inverter
communicates with the battery at that address
2 OFF ON OFF OFF OFF OFF Set to the slave module 1
3 ON ON OFF OFF OFF OFF Set to the slave module 2
4 OFF OFF ON OFF OFF OFF Set to the slave module 3
5 ON OFF ON OFF OFF OFF Set to the slave module 4
6 OFF ON ON OFF OFF OFF Set to the slave module 5
7 ON ON ON OFF OFF OFF Set to the slave module 6
8 OFF OFF OFF ON OFF OFF Set to the slave module 7
Positive and negative connection: the battery modules are connected in
parallel through the connecting terminals, and finally the main controller
module is connected in parallel. The power cable adopts waterproof
connector. When connecting the power plug, its corresponding interface must
be aligned.
Battery anode and Battery cathode

Stack’d Series HOMEGRID Technical
Page 14 Chapter 2: Introduction
2.5. Sleep and Wake up
2.5.1 Sleep
1) The main controller module will turn off the main relay when the battery module has a
charging and discharging MOS fault.
2) When the battery module has the output of under voltage protection battery shutdown, the
main controller closes the main relay.
2.5.2Wake up
When the system is in sleep mode, after completing the operation, the system will exit the low
power mode and enter the normal operation mode:
1) Connect the charger, and the output voltage of the charger must be greater than 48V.
2) Connect the upper controller to observe whether the communication between the main
controller and the battery is normal
3) Observe whether the upper controller has charging current.
4) After successful charging, the system will enter normal mode.
Note:
●when the DC bus has a voltage greater than 48VDC, the system main controller module is
powered, and the main relay is closed to charge the battery module and establish
communication. If the battery module cannot charge and establish communication, the main
controller module will delay about 10s to disconnect the main relay.
2.6. Forced discharge mode
When the battery is in the sleep mode for under voltage protection and the minimum battery
voltage is greater than 2.0V, turn off the power switch first, wait for 2S, and then turn on the
power switch. The battery enters the forced discharge mode for 5 minutes. In the forced
discharge mode, the battery powered main controller inverter works. If the inverter is connected
to the commercial power to charge the system, the battery will exit the forced discharge mode
and switch to the normal mode. If the on-load discharge current of the inverter exceeds 20A or
there is no charging current within 5 minutes, the battery will enter the sleep mode again.
2.7. Automatic parallel
With the automatic parallel function; when the slave battery (address > 1) is powered on, the
charge and discharge switch is in disconnect state. When the voltage difference between the
slave battery and master battery is less than the condition of "the minimum voltage difference
between the slave and the master", the master sends the command to the slave. After the slave
receives the command from the master, the charge and discharge switch will be connected, and
the slave is integrated into the master system to complete the parallel operation.

Stack’d Series HOMEGRID Technical
Page 15 Chapter 3: How to match communication with inverter
3. How to match communication with inverter
3.1. Supported brands
At present, the energy storage products of our company have completed matching tests with
some series of inverters from the following brands, and we will continue matching tests with
inverters of other companies. Please check our official website for the latest list of supporting
brands. http://www.homegridenergy.com.
3.2. Inverter matching list
The list only lists the inverter manufacturers one of the same series products, in general, for
inverter manufacturers in the same series of products, the communication protocols are the
same. Our battery can communicate with the other products of same series inverter, if a series
of products is encountered that cannot communicate, please contact us.
The following inverter matching list may not be up to date. The list may change according to
the software version upgrade, and the reference manual may does not change immediately
according to the software version upgrade. Therefore, if the user wants to get the latest inverter
matching support, please browse the official website to check the relevant documents,
http://www.homegridenergy.com.
The inverter manufacturer may upgrade its software version, which may cause problems in the
communication between our battery and the inverter. Therefore, before communicating with
the inverter, please confirm whether the software version of the inverter is consistent with the
list. If not, please contact us.
Inverter Power Base Venus
Firmware version Communication mode
Brand Type Protocol Version
Growatt SPF 12KT HVM V1.22
V439
RS485
Studer Xtender-XTH-8000-48 V1.0.3 Xcom-CAN
Sofar HYD5000-ES V6.0 CAN
Solis RHI-5K-48ES V1.2 CAN
Goodwe GW5048-EM V1.5 CAN
Victron MultiPlus-II V6.0 CAN
SMA S16.0H-12 V2.0 CAN
Sermatec SMT-5K-TL-UN V1.2 CAN
Schneider ConextTM Gateway V2.0 RS485
PYLON SUNSYNK-5K-SG01LP1 V1.2 CAN
Sol-Ark Sol-Ark-12K-P V1.0 CAN
Li_PLUS ZRStandard V1.2 CAN

Stack’d Series HOMEGRID Technical
Page 16 Chapter 3: How to match communication with inverter
3.3. Connection with inverter
This section will introduce how to connect the Stack’d Series products. Inverter manufacturers
may upgrade their products, resulting in hardware communication interface changes. If
communication is not possible in the application according to the following wiring method,
please contact with us.
The CAN/RS485 communication port of the Stack’d Series is connected with the
communication interface of inverter.
Connect to the Victron inverter Connect to the PYLON inverter
Connect to the Growatt inverter Connect to the Sofar inverter
Connect to the Solis inverter Connect to the Goodwe inverter
Connect to the Sermatecl inverter Connect to the Sol-Ark inverter
NOTE:
●The above CAN and RS485 communication connections are not connected the ground wire,
in the application of relatively large interference, it is recommended to connect the ground
wire, the ground wire connection method is a single-ended shielding line.

Stack’d Series HOMEGRID Technical
Page 17 Chapter4: Safe handling of lithium batteries Guide
4.Safe handling of lithium batteries Guide
4.1. Schematic Diagram of Solution
Figure 4.1. Schematic diagram of solution
4.2. Familiar with system
Be careful when unpacking the system. The whole system is heavy. Do not lift it with a pole.
The weight of the battery can be found in the chapter "specifications".
Be familiar with batteries. The battery poles are located on the left side of the battery. The
battery polarity is shown on the left side of the battery. The positive pole is represented by "+"
and the negative pole by"-".
Figure 4.2. Side view of the whole system
4.3. Precautions before installation
Before installation, besure to read the contents in Chapter 1 Safety Precautions, which is related