4
1
PRODUCT FUNCTION
1.2
Charging Algorithm
When the LFP1225(LV)/LFP1240(LV) is turned on, it will move into the
Constant
Current stage. This stage maintains a constant current until the battery voltage
reaches its set point. The current may vary during operation in order to maintain
safe operating temperature, or to limit the difference between input and output
voltage.
The charger will then move to
Constant Voltage stage. This stage maintains 14.5V
on the output battery, keeping the battery topped up. This stage also counteracts
the battery’s self discharging. When a load applied to the battery causes it to lose
charge, the charger will move back into the
Constant Current stage.
1.3
Turn On/Off Thresholds
12V
LFP1225 &
LFP1240
12V
LFP1225-LV &
LFP1240-LV
Solar
All Models
24V
(standard)*
3
LFP1225 &
LFP1240
Input
Open Circuit
Low voltage
conditions *
1
Turn ON above
13.2V
12.0V
17.5V
26.4V
Turn OFF below
12.7V
11.9V
17.2V
25.4V
Input
Loaded Low
voltage
conditions*
2
Turn OFF
instantly below
8V
17V
Turn OFF after
20 secs below
9V
N/A
18V
Input
Over voltage
shutdown
Turn ON below
15.5V
28V
32V
Turn OFF
instantly above
16V
29V
32.5V
Turn OFF after
20 secs above
15.6V
28.2V
32.1V
Output
Under voltage
shutdown
Shutdown if Output Battery < 4V
*
1
Tested every 100 Seconds.
*
2
Constantly tested.
*
3
LV Versions not suitable for use in 24V vehicles
