Manual

Charge Controlling
975-0560-01-01 Revision B 1–7
Battery Temperature Compensation
The Battery Temperature Sensor (BTS) provides temperature-compensation for
battery charging. With the BTS installed, the charge controller adjusts charging
voltage with the temperature of the battery to optimize the charge delivery and
help prolong battery life. The BTS also provides over-temperature protection for
the batteries.
The BTS plugs into the BTS RJ-11 port located inside the wiring compartment of
the charge controller. The BTS can be installed on the negative battery post,
positive battery post, or side of the battery case. See “Installing the Battery
Temperature Sensor” in the Xantrex XW MPPT 80 600 Solar Charge Controller
Installation Guide (Document Part Number 975-0540-01-01).
Figure 1-3 Two-stage battery charging cycle
Absorption
State
Bulk State
Current
Time
Max Current
Limit
Voltage
Time
Absorption Voltage
Float Voltage
Max Absorb Time - dflt 3 hrs
(adjustable 1 min - 8 hrs )
Bulk/Boost
Voltage
Boost
Timer
1hr fixed
Absorption Exit Current
Threshold = 2% of
programmed AH capacity
Recharge Voltage
No Float
State