©
2013 Magnum Energy, Inc.
Page 17
Installation
2.4.6
Battery Temperature Sensor Installation and Wiring
The Battery Temperature Sensor (shown in Figure 2-7) provides the inverter with precise battery
temperature information to automatically adjust the charge voltage set-points (Absorb, Float or
Constant Voltage). This allows the batteries to be correctly charged under extreme temperature
changes.
If the temperature sensor is NOT installed and the batteries are subjected to large temperature
changes, the battery life may be shortened.
The BTS cable may be extended—using a RJ11 connector (female to female) and a standard phone
cable with RJ11 connectors—to a maximum length of 40 feet (12m). However, your inverter to
battery cable length should not exceed the recommended distance provided in Table 2-2.
To install the BTS:
1. Attach the ring terminal end of the Battery Temperature Sensor to the negative battery terminal;
see Figure 2-5 for proper connection to the battery terminal.
2. Route the sensor’s cable to the inverter following existing wire runs.
3. Connect the RJ11 connector end of the BTS cable to the yellow-labeled BTS port on the inverter
(Item 6, Figure 1-1).
FRONT VIEW
SIDE VIEW
~2"
~1"
~½”
0.375"
diameter
Cable
~¾”
(~2.54 cm)
(~5.1 cm)
(~1.9 cm)
(~1.3 cm)
(~.95 cm)
Figure 2-7, Battery Temperature Sensor
