Fortress Power LFP-10 User manual

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FORTRESS LITHIUM BATTERY INSTALLATION MANUAL
SECURE YOUR ENERGY WITH FORTRESS LITHIUM BATTERY SYSTEMS
Fortress battery systems utilize the industry’s most environmentally benign chemistry- Lithium Ferro
Phosphate, which eliminates operating temperature constraints, toxic coolants and the risk of thermal
runaway and fire. The built-in smart Battery Management System (BMS) integrates multilevel safety
concepts: Overcharge and Deep Discharge Protection; Voltage and Temperature Observation.
Fortress High-performance Lithium Batteries are manufactured at the highest quality standard. It comes
with large power capacity and a fast charging and continuous discharge power. The proprietary
architecture and BMS eliminate the need for cooling or ventilation, which creates an efficient round-trip
conversion.
Fortress Lithium Battery is safe, easy to install, consistently reliable, highly efficient. It provides you the
lowest lifetime energy cost.
This installation manual contains information concerning important procedures and features of Fortress
Power Lithium batteries. Read all the instructions in this manual before installation, operation,
transportation, storage and maintenance.

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Table of Contents:
1. SAFETY
1.1 General safety precautions and Safety instructions ................................................................4
2. TRANSPORTATION, HANDLING AND STORAGE
2.1 Transportation and Handling……………………………………….……..…….………..……………5
2.2 Storage………………………………………………………………………………..……………………5
2.3 Response to emergency situations ............................................................................................6
3 PRODUCT INTRODUCTIONS
3.1 Technical data ...............................................................................................................................6
4. INSTALLATION
4.1 Tools and material list for installation…………………………..…………….……..………….……7
4.2 Inspection before installation………………………………………………….……..…….….…….7-8
4.3 Installation Location…………………………………………………………………..…………………8
4.4 Installation Steps…………………………………………………..…………….…..……….………….8
4.5 Connection Terminals……………………………………………………….…….…..….……………..9
4.6 Mounting Hardware……………………………………………………………….….……...……….9-11
4.7 Final Connection of the Installation………………………………………………..…….………….11
5. PARALLEL CONNECTION……………………………………………………………….……………11-12
6. Retrofitting…………………………………………………………………………….….….……………..12
7. OPERATING
7.1 Operating environment…………………………………………………..…………….……..……….12
7.2 Charging……………………………………………………………………………….….…….….…….12
7.2.1 Charging stage ……………………………………………………………………....….…..….…….13
7.3 Discharging …………………………………………………………………………………….……….13
7.4 Parameter set up guide in Charger/Inverter ………………………………………..….………13-14
8. TROUBLE SHOOTING
9. SERVICE AND MAINTENANCE

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1. SAFETY
1.1 General safety precautions
❖All types of breakdown of the product may lead to a leakage of electrolyte or
flammable gas.
❖During installation of the battery, the utility grid, solar input must be disconnected
from the Battery Pack wiring. Wiring must be carried out by qualified personnel.
Battery Pack is not user serviceable. High voltage or current is present in the device.
The electronics inside the Battery Pack are vulnerable to electrostatic discharge.
Observe the following precautions:
❖Risks of explosion
➢Do not subject the battery pack to strong impacts.
➢Do not crush or puncture the battery pack.
➢Do not dispose of the battery pack in a fire.
❖Risks of fire
➢Do not expose the battery pack to temperatures in excess of 122 ℉.
➢Do not place the battery pack near a heat source such as a fireplace.
➢Do not expose the battery pack to direct sunlight.
➢Do not allow the battery connectors to touch conductive objects such as wires.
❖Risks of electric shock
➢Do not disassemble the battery pack
➢Do not touch the battery pack with wet hands
➢Do not expose the battery pack to moisture or liquids
➢Keep the battery pack away from children and animals.
❖Risks of damage to the battery pack
➢Do not allow the battery pack to come into contact with liquids.
➢Do not subject the battery pack to high pressures.
➢Do not place any objects on top of the battery pack.
IMPORTANT NOTE: Circuit Breakers, Disconnects and Fuses should be employed throughout
several points of a power storage and generation installation to effectively isolate and protect all
components of the system to safeguard against faults, short circuits, polarity reversals or a failure of
any component in the overall system. Fuses, breakers, wiring ratings and values should be determined
by established standards and evaluated by certified electricians, licensed installers, and regional code
authorities. The Fortress Lithium Batteries must always be installed with a charge controller and the
appropriate settings to protect the batteries from open PV voltage and other high voltage charging
sources. The Fortress Battery Management System (BMS) alone will not protect the batteries from
these extreme electrical phenomena. Failure to adhere to installation protocol will void the Warranty.
CAUTION: Verify polarity at all connections with a standard volt meter before energizing the

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system. Reverse polarity at the battery terminals will void the Warranty and destroy the batteries. Do
not short circuit the batteries.
Most batteries pose some risk of shock or sparking during the installation and initial wiring and
connection process. Wearing insulated gloves, clothing and footwear and using electrically insulated
tools are required when working with Fortress Power Lithium Batteries. Cover, restrain or remove
jewelry or conductive objects (metal bracelets, rings, belt buckles, metal snaps, zippers, etc.) when
working with any electrical or mechanical device. Cover or restrain long hair and loose clothing when
working with any electrical or mechanical device.
CAUTION: Do not combine Fortress Lithium Batteries with other brands or chemistries; Do not
mix Fortress Lithium Batteries from different installations, clients, or job sites.
CAUTION: Do not disassemble or modify the battery. If the battery housing is damaged, do not
touch exposed contents.
2. TRANSPORTATION, HANDELING AND STORAGE
2.1 Transportation and Handling
Do not knock, drop, puncture, or crush battery; Do not expose battery to flames, incinerate or direct
sunlight; Do not open battery case or dissemble battery; Do not lift battery by the terminal cables; Do
not vibrate battery; Do not expose battery to water or other fluids; Do not expose battery to open flame;
Do not place the product nearby highly flammable materials, it may lead to fire or explosion in case of
accident; Store at cool and dry place. (Do not store in greenhouses and storage areas for hay, straw,
chaff, animal feed, fertilizers, vegetables or fruit products; Store the product on a flat surface; A
ventilated area is strongly recommended for handling the product; Store the product out of reach of
children and animals; Store the product where it should be minimal dust and dirt in the area; do not
transport battery upside down;
2.2 Storage
Do not expose battery to high temperatures. Fortress Lithium Batteries should be stored out of direct
sunlight under the following temperature conditions.
Storage Temperature and RH(Min./Max.) 14°F(-10°C) – 113°C/45°C 5%~75% RH
Storage Temperature and RH(Min./Max.) 41°F/5°C – 95°F/35°C 5%~75% RH
Systems should be put into storage at 60% SOC and checked monthly to ensure the system SOC does
not fall below 20%. At 20% SOC the battery will self-discharge in approximately 2 months. Also check
the voltage every 3 months and recycle every 6 months if the battery is not use for long time.

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2.3 Response to emergency situations
The battery pack comprises multiple batteries that are designed to prevent hazards resulting from
failures. However, Fortress Power cannot guarantee their absolute safety.
❖Leaking Batteries
If the battery pack leaks electrolyte, avoid contact with the leaking liquid or gas. If one is exposed
to the leaked substance, immediately perform the actions described below.
➢Inhalation: Evacuate the contaminated area and seek medical attention.
➢Contact with eyes: Rinse eyes with flowing water for 15 minutes and seek medical attention.
➢Contact with skin: Wash the affected area thoroughly with soap and water, and seek medical
attention
➢Ingestion: Induce vomiting, and seek medical attention
❖Fire
In case of fires, make sure that the extinguisher is available near the battery pack. If possible,
move the battery pack to a safe area before it catches fire.
Note: Fire extinguisher
Water, carbon dioxide, dry chemical powder and foam are the most effective means to
extinguish a Lithium Ferrous Phosphate (LFP) battery fire
Use ABC Fire extinguisher, if the fire is not from battery and not spread to it yet.
3. PRODUCT INTRODUCTION
3.1 Technical data
Model
LFP-10
LFP-15
Total Energy(kWh)
10.24
15.36
Max. Charge Current (Continuous) [A]
100
100
Max. Discharge Current Continuous) [A]
100
100
Max Pulse Current for 5sec [A]
200
200
Capacity [Ah]
200
300
Voltage [V]
51.2 (48)
51.2 (48)
Charging Temperature [F]
32~113
32~113
Discharging Temperature [F]
-4~140
-4~140
Dimension [WxDxH]
16.4x9.4x33
16.6x13.4x33
Packaging Dimension [WxDxH]
34x20x12
34x20x15
Connection Terminal
M10
M10
Weight [Lb]
286
429
Scalability
Up to 2
Up to 2

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4. INSTALLATION
Safe and reliable installation requires trained and certified technicians. The following discussion of
Fortress Power Battery configurations is a basic primer. Due to the variety of systems and components
in the field, all possible scenarios are not covered. This is not the purpose of this section of the manual.
Refer to professional installers regarding your system and its components and specifications. We
encourage you or your installer to contact us with any specific questions for technical support. We are
committed to working with you and your installation team to achieve a safe, reliable storage system
that will provide years of maintenance free service.
Fortress Lithium Batteries are designed for parallel operation only - do not arrange in
series for increased voltage. Series arrangement can result in damage to Fortress Lithium
Batteries and will void warranty!
Do not combine Fortress Power Battery with other brands or chemistries. Do not mix
different capacity batteries, do not mix batteries from different installations, or job site.
4.1 Tools & Materials
❖Insulated tools and materials are various from projects, following are general recommendations:
➢Wire recommendation: AMG02
➢Terminal luge recommendation: 3/8 inch
➢Conduit size Recommendation: 3/4, 1& 1 ¼ inch
➢OHSA approved personal protective equipment
4.2 Inspection
•To check the battery package, type, quantity, appearance and other components
•Check if there is any damage on the battery box
Insulated gloves
Safety Glasses
Safety Shoes

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•Check the battery terminals and connections to make sure they are clean, free of dirt, fluids and
corrosion
•All battery cables and their connections should be tight, intact, and NOT broken or frayed
•Replace any damaged batteries and cables
•Check torque on terminal bolts
IMPORTANT NOTE: Please inform us within 7 days after receipt of goods if any problems,
otherwise we deem clients have no objection to the goods.
4.3 Installation Location
The battery pack must be installed indoors. Make sure that the installation location meets the following
conditions:
• The area is completely waterproof.
• The floor is flat and level (Inclination < 15°).
• There are no flammable or explosive materials.
• The optimal ambient temperature is within the range from 59 ℉to 95 ℉.
• The temperature and humidity are maintained at a constant level.
• There is minimal dust and dirt in the area.
IMPORTANT NOTE: If the ambient temperature is outside the operating range, the battery pack
may stop operating to protect itself. Frequent exposure to harsh temperatures may deteriorate the
performance and life of the battery pack.
4.4 Installation Steps
•Clean cable connections. Broken, frayed, brittle, kinked or cut cables should be replaced
•Install and secure new battery. Be careful not to ground the terminals to any metal mounting, fixture,
or body part
•Connect battery cables first and ground negative cable to avoid sparks
•Recommended terminal torque is 7.0 –7.7 Nm (5.1 –5.7 ft-lb)
•Power Cabling for the Fortress Power Battery is not included. System Wiring Basics Refer to
published electrical wiring specifications and ratings, refers to the below Battery Cable Sizing Chart.
Your qualified installer or application specifications will determine the wire gauge for your system.

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CAUTION: Verify polarity at all connections with a standard volt meter before energizing
the system. Reverse polarity at the battery terminals will void the Warranty and destroy the
batteries. Do not short circuit the batteries.
4.5 Connection Terminals
The Fortress Lithium Batteries are equipped with two M10/M8 threaded terminals with a lock washer
and nut. The right-hand stud resides in a red high temperature molded insert. This connection is for the
positive lead. The left-hand stud resides in a black high temperature insert. This connection is for the
negative lead. 10mm ring terminals along with proper size wiring cables are required to connect battery
to inverter/charger. Do not reverse polarity, doing so will void warranty. Use a volt meter to check polarity
before connecting terminals.
Water Resistant Plastic Terminal Covers are also included and will be in place when your units arrive.
The boots are to be placed over the cable terminations and will stretch to form a water-resistant seal
around the base of the molded inserts and terminal connections.
NOTE! Without exception, product experiencing terminal burn out will not be warranted.
4.6 Mounting Hardware
The Fortress Power Batteries are designed to stand on the floor with 4 wheels on the bottom. If it’s
wished, the wheels can be disassembled. It’s recommended to put the Batteries on durable racks to
avoid flooding. Please refer to the Fortress Lithium Battery Data Sheet for weight and dimension.
Mounting the battery pack to a wall
It is recommended to mount the battery pack to a wall. Make sure to leave a space of at last 2.18 inches
in between the battery pack and the wall

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To mount the battery pack to a wall, take the following steps:
KEY POINTS SUMMARY:
1. Each Fortress Lithium Battery contains circuitry that protects the Lithium Ferro Phosphate cells from
overcharging, over-discharging, and excessive load amperage. If the values specified are exceeded,
the battery will enter a protective shut down state. In some cases, this may result in the need to re-
initialize an inverter charger or other pieces of equipment in the installation. In other cases, the inverter’s
system settings may be saved within the inverter memory storage and will not need to be reset. This is
not an absolute standard but is common among most inverter chargers. Check your inverter
manufacturer specifications.
2. If the battery enters a self-protective mode, negligible voltage readings will be present until the unit
is reset. In some instances, after a prolonged shut down, a charge might need to be manually applied
to the energy storage bank. Should this occur, please contact Fortress Power for technical support.
Fortress Lithium Batteries are designed to remain robust and safe under most circumstances.
1. Fasten the screws through the mounting brackets into the
holes of the battery pack on its both sides.
2. Secure the mounting brackets to the wall with screws.
3. Lock the rollers on the battery pack

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3. Although each Fortress Lithium Battery contains circuitry that protects the Lithium Ferro Phosphate
cells from overcharging, over-discharging and excessive load amperage, Fortress Lithium Batteries
must always be installed with a charge controller and the appropriate settings to protect the batteries
from open PV and other high voltage sources. Fortress Lithium Batteries alone will not protect from
extreme electrical phenomena.
4. GRID TIED SYSTEMS: Once the Fortress Lithium Battery has been installed, turn on the entire
system to test. Once testing has been completed, please disconnect the batteries from the load center
until your local Utility Inspector is ready to turn on the entire system. The charge controllers and inverter
monitoring systems can drain the Fortress Lithium Batteries over an extended period when the entire
system is not fully operational due to the electrical draw of the system components.
5. OFF GRID SYSTEMS: Do not connect the Fortress Lithium Batteries until the entire system is ready
to turn on and is fully operational.
6. See Charge Controller Settings in the Appendix of this manual. Fortress Lithium Batteries are
compatible with almost all Inverter Chargers and Charge Controllers. Please contact Fortress Power to
learn the recommended settings for any device not explicitly covered in this manual.
4.7Final Connection of the Installation
Final installation and operation guidelines will be dictated by your Electrician and Installer based on the
overall properties of and procedures for the equipment in your installation and any code requirements
that apply to your region. Fortress Power technicians and sales staff are available to provide any
additional information on the Fortress Lithium Batteries as needed. Please be aware of the potential
electrical hazards before interacting with any and all electrical or mechanical devices. Please take all
necessary safety precautions in your projects and installations.
5. PARALLEL CONNECTION
Fortress Lithium Batteries with the same capacity may be connected in parallel for up to 2 units only.
All wires should be an appropriate gauge and constructed to handle the loads that will be placed upon
it. Heavy gauge, high strand copper wire is the industry standard due to its stability, efficiency and
overall quality. A qualified installer should understand this and must adhere to the industry standard and
published electrical guidelines.
CAUTION! Fortress Lithium Batteries are designed for parallel operation only - do not arrange
in series for increased voltage. Series arrangement can result in damage to Fortress Lithium Batteries
and will void warranty!
CAUTION! For parallel connecting: Maintain identical wire lengths from each Fortress Power
Battery terminal to the common bus. Use identical wire construction from each Fortress Power
Battery terminal to the common bus.

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Storage Capacity and total available Amperage is increased by Parallel arrangements. The following
illustration shows two Fortress Lithium Batteries in Parallel. Note the overall Voltage range is not
changed. The available amperage from the system has been doubled. The following illustration shows
two Fortress Lithium Batteries in Parallel.
CAUTION! Before you turn on the two parallel connected Fortress Power Batteries, make
sure both batteries have the same State Of Charge (SOC) and the voltage difference between
two battery pack shall not over 0.2 voltage to avoid the current flow from the higher voltage
battery into the lower voltage battery. The large current could potentially damage one or both
batteries.
6 RETROFITTING
Retrofit Fortress Lithium batteries to an existing system is not recommended. Like all other batteries,
Fortress Lithium Battery’s open voltage will diminish during the operation. Parallel batteries with
different open voltage may cause reverse currents, which could damage the batteries.
7 OPERATING
7.1 Operating environment
Model
LFP-10
LFP-15
Charging Temperature [F]
32~113
32~113
Discharging Temperature [F]
-4~140
-4~140
7.2 Charging
Never attempt to charge a battery without first reviewing and understanding the instructions for the
charger being used. Only use a Fortress Power Approved Lithium Ferro Phosphate (LFP) charger if
ancillary charging is required before installation, testing or troubleshooting. Failure to use a Fortress
Power approved LFP charger will damage the battery and void the warranty
CAUTION! Do not attempt to charge the battery below 32 F (0 degrees C). Attempts to
charge at subfreezing temperatures can adversely affect State of Health (SOC) and cycle life

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and will void the warranty; never charge battery if it is frozen; never charge a visibly damaged
battery.
7.2.1
Please follow the following steps to use the charger to charge the battery:
1) Connect the charger leads to the battery.
2) Make sure that the charger lead, both at the charger and the battery side, connections are tight.
3) Turn the charger on
CAUTION! Recommended charging current is 50A, Max. 100A (Please follow the
specification on Fortress Lithium Battery Datasheet.)
7.3 Discharging
⚫Do not discharge battery below operating voltage
⚫Do not discharge battery at rates greater than maximum continuous current
⚫Do not operate in conditions that will exceed the internal operating temperatures of the battery
7.4 Parameter set up guide in Charger/Inverter
Before commissioning the energy storage system, the appropriate controller and inverter settings must
be programmed per the manufacturer’s recommendations. Consult the manufacturer’s manuals and/or
access technical support (Darfon, Schneider, Outback, SMA, Solark, Magnum, Outback).
Although Fortress Lithium batteries can perform at very high rates and depths of discharge within a
very wide temperature range, in order to achieve extended life cycles and to comply with the Warranty,
the following guidelines should be followed:
Understand Charge Stage
1) Bulk Charge: Charge at Constant Current (CC) to Bulk/Absorb Voltage
2) Absorption Charge: Maintain Constant Bulk/Absorb Voltage (CV)
3) Terminate when charge current drops below 0.05C and
4) During the float charge the voltage maintain at 54.4VDC (Float Voltage)
5) Max. Charge Voltage is 58.4VDC (over charge protection)

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Charger/Inverter configuration recommendation for best Performance:
Schneider/outback/ SMA/Sol-Ark
3000 Cycles
6000 Cycles
Equalized Support
Off
Off
Capacity Limit
LFP-10:200 Ah / LFP-15:300 Ah
Equalized Voltage
Off
Off
Recharge Voltage
47V
49V
Bulk Voltage
57.6V
55.4V
Absorb Voltage
57.6V
55.4V
Low Battery Cut Out Voltage
48.4V
50.7V
High Battery Cut Out Voltage
58V
56 V
Float Voltage
OFF/unless use as back up
54.4V
Max Charge Current
100A per battery
50A per battery
The Battery Parameter Setting Guides with Schneider and Outback Inverters/Chargers are available to
download on www.fortresspower.com/Resource
Recommended operating parameters of charger/Inverters For 3,000 Cycles:
•Operating temperature range: 14 F to 130F (-5 °C to 49°C)
•Max Discharge/Charge Rate: < 0.5C Amps
Recommended operating parameters of charger/Inverters For 6,000 Cycles:
•Operating temperature range: 32 F to 110 F (0°C to 43°C)
•Max Discharge/Charge Rate: < 0.3C Amps
•Storage must be equal to or more than twice the rated output of the Inverter
At the End of Cycle Life capacity is Equivalent to 70% Retained Capacity
8. TROUBLESCHOOTING
The Battery BMS provides multiple level protection function:
• Over Charge Voltage Protection
• Over Discharge Protection
• Over Current Protection for Discharge Via Thermal Control
• Short Circuit Protection
• ON/OFF Switch
In the event of a fault the battery protection circuit will open its internal relay/mosfet disconnecting the
negative battery terminals form the internal cells. The battery uses a relay/mosfet and precautions
should be taken to reduce voltage spikes and large inductance in the application.
Over Voltage Fault
62.4±0.4V
Over Voltage Recovery
60.8±0.8V
Low Voltage Fault
32.0±0.8V

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Low Voltage Recovery
36.80±1.6V
If batteries enter a self-protective mode, negligible voltage readings will be present until the unit resets.
In some instances, after a prolonged shut down, a charge might need to be manually applied to the
energy storage bank. Should this occur, please contact Fortress Power for technical support. Fortress
Lithium Batteries are designed to remain robust and safe under most circumstances.
9. SERVICE AND MAINTENANCE
Batteries should be carefully inspected on a regular basis in order to detect and correct potential
problems. This routine should be started when the batteries are first received.
PLEASE CONTACT US FOR TECHNICAL SUPPORT
Fortress Power, LLC
505 Keystone Road,
Southampton, Pennsylvania, 18966
877.497.6937
[e-mail]
www.FortressPower.com