Sensata Dimensions 12LPC15 Owner's Manual page 22

External Power Mode Continued
Cold Charging (LFP Only)
Under normal charger operation, if the battery temperature drops below 5°C/41°F while charging, the charger will
switch to 0.1C charging. If the temperature increases to 10°C/50°F, the charger will resume normal charging. If
the charger drops to 0°C/32°F, the charger will shut down, and it will restart 0.1C charging at 5°C/41°F. When the
charge cycle first starts up and immediately enters Cold Charger Off or 0.1C charging, the charger will lengthen the
charge cycle times to help ensure that the battery is warm enough to accept a charge current.
The 0.1C temperature setpoint and Cold Charger Off setpoint are adjustable with the optional NVM Setup Tool.
The recovery thresholds are always 5°C/41°F (Δ5°C/9°F) higher than the setpoint when the charge cycle starts
above the 0.1C temperature threshold. When the charger starts the charge cycle in 0.1C mode or Cold Charger Off
mode, then the recovery threshold between 0.1C charging and normal charging is 15°C/59°F (Δ15°C/27°F).
Load Management
Incoming AC power is shared between the AC loads and the charger. The AC loads are given priority; this means
that the charger will reduce its output when AC loads are applied. This feature also controls the total amperage draw
of the system so that the utility service circuit breaker is not tripped. The load management feature will return the
charger to full output when the AC loads are removed or reduced.
Figure 11 Load Management
The total amperage draw of the system is controlled by the AC limit setting also known as the BCR. These terms
may be used interchangeably. The default AC limit is set by the factory to 15 A. The BCR may be changed at the
factory or through the NVM Setup Utility.
NOTE: Dynamic external loads (such as motors or pumps that continuously vary the power required) may cause
variations in the charge rate. The charger may reset if the dynamic load causes the input AC waveform to become
temporarily disqualified.
Page 22
12LPC15 Manual