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Charging Notes
Bulk Charging:
Charging at the Recommended Charge Current to the Bulk / Absorb Voltage (1-Stage
Bulk, a.k.a. CC) will charge the battery to approximately 95% SoC.
Absorb Charging:
Charging at the Bulk / Absorb Voltage to the Absorb Termination Current (2-Stage
Bulk + Absorb, a.k.a. CC/CV) will charge the battery to 100% SoC.
Float Charging:
In photovoltaic applications it is acceptable to float charge the battery at the Float
Voltage for the remainder of the solar day to ensure the battery is at 100% SoC going into the evening.
Otherwise float charging is not necessary with your Lithium Iron battery.
Temperature Compensation:
Temperature compensating the battery
’s charge voltages is not needed or
recommended with your Lithium Iron battery. Doing so can cause the battery to be undercharged or
overcharged. Any temperature compensation features on your charger(s) should be disabled. This is
typically accomplished by disconnecting any battery temperature sensors and setting the T-Comp value
on your charger(s) to 0 mV/
°C.
In a multiple parallel battery configuration the charge and discharge currents are reduced 30% due to
potential variances in battery resistance and cable resistance, which will result in unbalanced current
rates that can potentially exceed the single battery max charge or discharge rate. See the
Charge /
Discharge Rate Parameters
table on the previous page for recommended rates in multiple parallel
battery configurations.
Continuous charging above the Recommended Charge Current will generate excessive heat, potentially
causing a High Temperature Shutdown. If this occurs, allow the battery to naturally cool until it
automatically resets (this could be several hours), then reduce the charge rate and continue normal
operation.
If necessary, and if full capacity is not required, the battery may be taken off charge at any point in the
charge cycle with no long term impact on the battery. The battery will not be damaged if left in a partial
state of charge.
Discharging the battery below 80% depth of discharge is strongly discouraged, especially in multiple
battery
parallel configurations. Doing so can significantly shorten the battery’s life, and potentially result in
an unrecoverable Low Voltage Shutdown requiring non-warranty factory service.
