Lithium Charging Instructions

Charging Instructions 09.02.20
CHARGING INSTRUCTIONS
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Charge Profiles
LiFePO batteries can be charged with either a 1-stage profile (constant current (CC) aka Bulk Stage) or a 2-stage profile (constant
current, constant voltage (CC-CV) profile aka Bulk and Absorption Stages). The 1-stage profile will charge the battery ~97% and
the 2-stage profile will charge the battery 100%. The 1-stage profile is suicient, since LiFePO batteries do not need to be fully
charged; this will not reduce life as it does with lead-acid.
1-Stage Charge Profile - CC
1-STEP CHARGE
DESCRIPTION
STEPS DESCRIPTION CHARGE PARAMETERS
Step 1 - Charge
at a constant
current until
the battery
reaches
termination
voltage.
1
*Recommended
Charge Current
≤0.5C (C = Capacity of battery system)
**Maximum
Charge Current
1C or 100A (the lower of the two values)
SYSTEM VOLTAGE 12V 24V 36V 48V
Stop
Termination
Voltage
14V – 14.6V 28V - 29.2V 42V - 43.8V 56V - 58.4V
2 Stage Charge Profile - CC-CV
2-STEP CHARGE
DESCRIPTION
STEPS DESCRIPTION CHARGE PARAMETERS
Step 1 - Charge
at a constant
current until
the battery
reaches
absorption
voltage.
1
*Recommended
Charge Current
≤0.5C (C = Capacity of battery system)
**Maximum
Charge Current
1C or 100A (the lower of the two values)
SYSTEM VOLTAGE 12V 24V 36V 48V
Step 2 - Hold
absorption
voltage until
charge reduces
to termination
current.
2
Absorption
Voltage
14V – 14.6V 28V - 29.2V 42V - 43.8V 56V - 58.4V
Stop
Termination
Current
≤0.05C (C = Capacity of battery system)
* Charge current must be reduced at temperatures <0C (32F). See details in Charge Temperature section.
** For optimum life, charge at recommended rate. Some models are specially designed to allow for higher current.