USER MANUAL - LBU-ONL 1.5K/2.25K/3K/4.5K
VER.2211.17-One (ENG)
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12.
BATTERIES: RECHARGING
This Inverter includes a powerful and modern battery charger powered by AC input
Charger Configuration:
Maximum recharging current can be configured in the LCD frontal panel. Maximum current must be configured according to the capacity
of the battery bank.
Maximum current must be between 10% and 20% of the total AH battery capacity.
For example, for a small 9AH battery bank, the minimum current should be 0.1C (about 0.9A). In this case, charger should be configured
as 1A.
To get shorter recharging time current could be configured close to its maximum value 0.2C (1.8A). In this case, charger should be
configured as 2A.
Recharging Algorithm
This Inverter battery charger uses a 3 steps algorithm to care batteries.
1-
Constant Current
During this stage charger injects a constant current meanwhile batteries increase their voltage. During this stage batteries
recover up to 90% of their total capacity. This stage takes 60% of total recharging time.
2-
Constant Voltage
When first step is finished charger provides stable voltage meanwhile current decreases slowly. The charging voltage for
VRLA/AGM batterie is close to 2.35Vdc per cell (14.1 VDC per battery). In this stage batteries recover 100% of their capacity.
3-
Floating
This is stage where batteries keep charged with 2.25VDC per cell (13.5VDC per battery)
TEMPERATURE COMPENSATION
Batteries should be recharged with a room temperature under 30ºC. In case temperature rises above 30ºC, charger decreases charging
voltage to protect batteries as follows:
Over 30ºC:
-5mV/ºC per cell (-30mV/ºC per battery) during constant voltage stage
-3mV/ºC per cell (-18mV/ºC per battery) during floating stage
