Eflex Install Manual
Rev. 1.92
505 Keystone Rd, Southampton, PA 18966, USA . (877) 497 6937. sales@fortresspower.com .
www.fortresspower.com
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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.com/Resources
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.