Sensata Dimensions 12LP15 Owner's Manual page 24

Charger Battery Temperature Sensor (BTS):
Charger operation with a BTS cable is REQUIRED! The BTS measures the battery
temperature and automatically adjusts the charger output voltage for the fastest and
safest charge.
When batteries are cold, their chemical reaction is slowed, so they will not take on a
charge as easily. A charge voltage optimized for room temperature will not charge the
battery at low temperatures. The temp sensor cable allows the charger to increase the
charge voltage for optimum charging at low temperatures.
When batteries are hot, their chemical reaction is accelerated and they absorb energy too
readily. A charge voltage optimized for room temperature will tend to overcharge the
batteries and cause gassing. The BTS will cause the charger to decrease the charge
voltage to a safe level.
Our charger will switch to a "warm battery" mode in which the charger will only provide
a float voltage when the batteries reaches 122F/50C to 140F/60C. If the battery
temperature continues to rise over 140F/60C the charger will shut off. The charger will
resume charging in the "warm battery" mode when the battery cools to 131F/55C. The
charger will resume normal charging when the battery cools to 113F/45C.
Figure 12 - BTS
Connect the lug end of the temperature compensation cable to the negative post of the
battery. Connect the connector to the appropriate mating connector located at the side
of the inverter labeled "Temp Sense". Temp Sensor cable is part# ME-BTS-XX
122221 12LPC15 Manual Rev A.docx
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