Charging Steps - Uniteck UNIBAT AGM Manual Del Usuario

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CHARGING STEPS

In order to completely enjoy UNIBAT batteries storage capacity and power performance, it is
recommended to charge at least in 3 steps: bulk/boost (main charge), absorption (equalization), float.
Bulk/boost
Current (A) = 25% of the capacity
(max 40%)
Absorption / Equalization
Charging current (A) = 20% of the
capacity
Charging voltage = 14,4V
(accepted: 14,1-14,7V)
Floating / maintenance
charging
Current (A) = 0,5% of the capacity
End of charging voltage =
- with charger = 13,2V-13,7V
- with Solar = 13,6-13,9V
Those 3 steps are minimum steps you need to follow in order to ensure a 100% charge for an occasional
use. For regular and intensive charge, it is recommended using multi-steps evolved chargers (cf
UNICHARGE chargers or UNIMPPT charge controller). Thanks to it you can completely enjoy your
batteries performances (cycling number, lifespan)
Threshold voltage adjustment according to ambient temperature
Charging voltage data are indicated for an ambient temperature of 25°C. Below this temperature it is
recommended to adjust voltage threshold at +/- 30mV per degree.
Ex.: Ambient temperature of 35°C = 35°C – 25°C x 0,003V = voltage must be reduced by 0.03V.
A constant current of 25% of the capacity is
recommended until the equalization voltage is reached.
At the end of this step, the battery is charged at 80-
90%.
The voltage of the battery reaches its equalization
voltage and it is stabilized. The current is reducing.
The battery is charged. Charging voltage is reduced
and a low current must be delivered in order to
offset the battery self-discharge.
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