SENS MicroGenius S2/S4 Technical Manual
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9.2.
Float Mode
Float mode is used to maintain stationary batteries and AGM starting batteries in a fully charged state.
When the charger is in Float mode the output voltage is maintained at the float voltage setting. See the
inside cover label for original factory configuration float value.
Table 18 – Factory Float Voltage Settings
Configuration
Code*
Battery Type
Float Voltage
12V
24V
GEN
AGM
13.62
27.24
FLA
13.31
26.62
NCD
14.30
28.60
HCB
13.38
26.76
Ultracapacitor
15.00
25.40
FHP
FLA
13.31
26.62
MAR
VRLA
13.62
27.24
AGM
13.31
26.62
NCD
14.30
28.60
NGN
VRLA
13.62
27.24
AGM
13.31
26.62
NCD
14.30
28.60
PSP
N/A
12.00
24.00
*Configuration Code displayed on charger label.
9.3.
Dynamic Boost™ Mode
Dynamic Boost mode utilizes a higher voltage charge to quickly recharge batteries and ensure that all
battery cells in a battery string are charged to the same level. Dynamic Boost mode automatically adjusts
how long the charger remains in boost mode every recharge cycle. Dynamic Boost automatically adjusts
for differing battery sizes, depths of discharge, varying load, battery age and other variables. Dynamic
Boost
mode safely maximizes recharge performance while cutting risks of both overcharging and
undercharging associated with manual or automatic boost timers or earlier generation automatic boost
control systems.
Dynamic Boost is automatically used by the charger depending on battery type selected. See the inside
cover label for original factory configuration boost value. Flooded lead-acid, absorbed glass mat (AGM)
and nickel-cadmium batteries are automatically charged using Dynamic Boost mode when the battery
requires it. Charging in boost mode continues until the Dynamic Boost control system ends boost mode
or the boost time limit expires. The boost time limit is set to 24 hours by default. Since boost charging is
discouraged by most manufacturers of valve-regulated lead-acid (VRLA) batteries used in stationary
applications Dynamic Boost mode is disabled when the charger battery type is VRLA. Boost is also
disabled when the battery type is set to ultracapacitor.
Relatively high boost voltages are appropriate in applications where rapid charge recovery is essential or
required for strict NFPA-20 fire pump or NFPA-110 emergency power system installations. Order
chargers from the factory configured for fire pump/emergency power system installations or configure
the charger appropriately using the keypad or SENS Setup Utility. Use of the optional remote
temperature compensation probe is highly recommended to maximize charging performance and
optimize battery life.
