FORTRESS EFLEX 5.4 kWh LITHIUM BATTERY INSTALLATION MANUAL SECURE YOUR ENERGY WITH FORTRESS LITHIUM BATTERY SYSTEMS Fortress batteries utilize the industry’s most environmentally benign chemistryLithium Ferro Phosphate (LFP), which eliminates operating temperature constraints, toxic coolants, and the risk of thermal runaway and fire.
Rev. 1.92 General Information 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. Ambient temperature impacts battery performances, please follow instructions to set up system parameters.
Rev. 1.92 . . 505 Keystone Rd, Southampton, PA 18966, USA (877) 497 6937 sales@fortresspower.com www.fortresspower.com 3 .
Rev. 1.92 Table of Contents General Information ........................................................................................................................................... 2 Specifications .................................................................................................................................................... 6 Features ..................................................................................................................................................
Rev. 1.92 5.1 Charging ................................................................................................................................................ 21 5.1.1 Use the following steps to charge the battery with an external charger: ........................................... 21 5.2 Discharging ............................................................................................................................................ 21 5.3 Parameter set up guide for Charger/Inverter .......
Rev. 1.92 Specifications Mechanical Specifications Electrical Specifications Nominal Voltage: 51.2V Nominal Capacity: 105AH Rated Capacity @ 0.5C (50A): Dimensions: 446x546x183 mm Weight: 5.374 kWh Resistance: Ring Terminal Size: 98% Self-Discharge: <1%/Month 15 Maximum Allowed Modules in Parallel Charge Specifications Recommended Charge Current: <55A Maximum Charge Current: 100A Recommended Charge Voltage: 54.
Rev. 1.92 Features . . 505 Keystone Rd, Southampton, PA 18966, USA (877) 497 6937 sales@fortresspower.com www.fortresspower.com 7 .
Rev. 1.92 Registering for the Fortress Power Warranty Fortress Power batteries come with a warranty that depends on charge parameters that define the depth of discharge (DoD) and other important variables. To ensure Fortress Power is able to honor the warranty, please fill out the warranty letter at https://www.fortresspower.com/product-warranty/ as soon as the system is commissioned. The charge parameters depend on your brand of inverter.
Rev. 1.92 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.
Rev. 1.92 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. The battery circuit/BMS should be off. Relative Humidity (Min./Max.): 5%~75% RH Storage Temperature (Min./Max.
Rev. 1.92 2.4 Charge/Discharge ❖ Do not use unqualified equipment for charging and discharging, please follow the correct instructions for use ➢ Do not discharge the battery when the battery is depleted ➢ Do not charge or discharge batteries that are hot, deformed, or leaking.
Rev. 1.92 3. PRODUCT INTRODUCTION 3.1 Unboxing Check list Please confirm and do not discard the following items: CAN Bus Terminator + Cap. Installed on the last available communication port of the eFlex when paralleling multiple batteries. The terminator is installed backwards into the cap. RJ45 adaptor. Installed between the eFlex communication port and the battery inverter during closed loop communication on compatible inverter systems.
Rev. 1.92 3.2 Accessories and Part Numbers These mounting accessories are available for purchase. Please contact sales@fortresspower.com. Fortress Kit Name eFlex - wall mount kit eFlex- shelf mount kit eFlex - floor mount kit Description Wall mount panel Wall mount hooks Hammer screw M6 Hammer nut M6 8mm Rack mount kit left Hammer screw M6 Hammer nut M6 8mm Rack mount kit right Connection Plate Hammer nut M6 8mm Hammer screw M6 Kit Quantity 2 4 4 4 1 4 4 1 1 1 1 4.
Rev. 1.92 Insulated gloves Safety Glasses Safety Shoes 4.2 Inspection before Installation ✓ Check the battery package, type, quantity, appearance and other components ✓ Check if there is any damage on the battery box ✓ Check the battery terminals and connections to make sure they are clean, free of dirt, fluids and corrosion ✓ Check the Open Circuit Voltage. o Set the battery on a clean working space. o Make sure the + and - terminals are not contacting anything.
Rev. 1.92 ✓ Replace any damaged batteries and cables ✓ There are no flammable or explosive materials. ✓ The optimal ambient temperature is from 59 ℉ to 95 ℉ for longest battery life but more extreme temperatures are allowed for battery operation and storage. The best location will maintain temperature and humidity at a constant level. IMPORTANT NOTE: If the ambient temperature is outside the operating range, the battery pack may stop operating to protect itself.
Rev. 1.92 3. Once all brackets are properly positioned, carefully lift the battery with the help of someone and gently drop it into the female wall mounted brackets Note: the eFlex may be wall mounted in any orientation except for sideways with the terminals near the ground (see section 4.4.2 floor mount installation for picture) 4.4.2 Floor mount installation The eFlex 5.4 can be floor-mounted in several orientations.
Rev. 1.92 4.4.3 Other installation methods The eFlex is designed for multiple installation methods. The T-slot at the back of the enclosure provides the flexibility to use standard size 8 - M6 or M8 hammer screw to secure the battery to a variety of racks, including 19” server racks. In all cases, a clearance of 1” around the eFlex battery is required. Please visit https://www.fortresspower.com/fortress-power-video-library-2/ for videos on installing the eFlex. 4.4.
Rev. 1.92 If making a communication cable, please refer to the pinout diagram for an RJ45 cable below. CAUTION! Please check with Fortress Power to see if you can use the CAN comm. port to connect the battery to your charge controller or battery-based inverter. 4.4.6 Commissioning a single eFlex battery pack Installation procedure for a single eFlex battery 1. Turn the eFlex on momentarily to check battery voltage. Check that voltage between terminals is between 50-55V.
Rev. 1.92 system is increased with each additional parallel battery. For example, in a parallel system with two batteries, the available charging and discharging current is twice that compared to a single battery. Please follow this procedure to commission eFlex batteries in parallel: 1. Turn OFF all equipment in the system 2. Turn on batteries to check voltages independently. Make sure the voltage difference between the highest voltage and lowest voltage battery is less than 0.
Rev. 1.92 lower voltage battery could potentially damage one or both batteries. Resulting damage to the battery will void the warranty. 4.5 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.
Rev. 1.92 5. OPERATION 5.1 Charging CAUTION! Do not attempt to charge the battery below 32 degrees F (0 degrees C). Attempts to charge at subfreezing temperatures can adversely affect State of Health (SOH) and cycle life and will void the warranty; never charge battery if it is frozen; never charge a visibly damaged battery. 5.1.1 Use the following steps to charge the battery with an external charger: 1. Connect the charger leads to the battery. 2.
Rev. 1.92 Understanding 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 4. Unlike Lead Acid batteries, Lithium Ferro Phosphate batteries do not require Float Charge Charger/Inverter configuration recommendation for best Performance: Note: For inverter-specific integration manuals, visit www.fortresspower.
Rev. 1.92 6. INTERFACE GUIDE The eFlex has six LEDs on the front face allowing the user to decode the state of the battery as well as any important messages from the BMS. When the eFlex is turned on, each LED will also turn on and display a LED mode. The red “BMS” light will turn on during start-up diagnostic as well as when there is a communication error between batteries. If the problem persists, please contact Fortress Power tech support. In normal operation, the “RUN” LED light will be on.
Rev. 1.92 PLEASE CONTACT US FOR TECHNICAL SUPPORT Fortress Power, LLC 505 Keystone Road, Southampton, Pennsylvania, 18966 877.497.6937 techsupport@fortresspower.com www.FortressPower.com . . 505 Keystone Rd, Southampton, PA 18966, USA (877) 497 6937 sales@fortresspower.com www.fortresspower.com 24 .
