kWh Lithium Ferro Phosphate (LFP) Installation

Rev. 1.8
505 Keystone Rd, Southampton, PA 18966, USA . [phone]. [e-mail] .
www.fortresspower.com
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5.3 Parameter set up guide for 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, Sol-Ark, 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:
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:
The Battery Parameter Setting Guides with SMA, Sol-Ark, 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: 32 F to 120 F (0 °C to 49°C)
• Bulk voltage and absorb voltage should be set to 54.4V
Recommended operating parameters of charger/Inverters For 6,000 Cycles:
• Operating temperature range: 50 F to 110 F (10°C to 43°C)
• Storage must be equal to or more than twice the rated output of the Inverter
• Bulk voltage and absorb voltage should be set to 54.4V
At the End of Cycle Life capacity is Equivalent to 70% Retained Capacity
CAUTION! Do Not Operate Fortress Lithium Batteries at an average temperature
exceeding 30 °C / 86 °F over the life of the battery.