Outback Power Systems GS4048A Operators Manual - Manual (Page 36)

Operation
34 900-0161-01-00 Rev A
The Radian inverter, when equipped with the Remote Temperature Sensor (RTS) will compensate for
changes in temperature. The RTS is attached to a single battery near the center of the bank, to achieve
a representative temperature. The Radian inverter has a designated port for installing the RTS.
If installed in a multiple-inverter system, only a single RTS is necessary. It must be plugged into the
master inverter and will automatically control the charging of all slaves and all charge controllers.
When charging, an inverter system with an RTS will adjust the charging voltage inversely with changes
in temperature. It will
increase the charge voltage by 5 mV for every decrease of 1 degree Celsius per
battery cell. Similarly, it will decrease the voltage 5 mV for every increase of 1°C per cell.
This setting affects the Absorption, Float, and Equalization set points. The Sell Voltage and Re-Float
Voltage set points are not temperature compensated. The Equalization set points are not
compensated in OutBack charge controllers.
 In a 48 Vdc system (24 cells, 2 volts each), this means 0.12 volts per degree Celsius above or below 25°C.
Maximum compensation is ± 2.4 Vdc.
EXAMPLES:
 A 48 Vdc system with batteries at 15°C will compensate its charging to 1.2 Vdc higher than the set points.
 A 48 Vdc system with batteries at 40°C will compensate its charging to 1.8 Vdc lower than the set points.
Slope
Some batteries require different amounts of compensation. The OutBack FLEXmax Extreme charge
controller has an adjustable rate of compensation (“slope”) and is not limited to 5 mV. The FLEXmax
Extreme can be networked with the Radian with the HUB Communications Manager. If this is done,
the Radian can import the slope setting from the FLEXmax Extreme charge controller.
NOTE:
Temperature compensation only applies to the battery charging function. Other set points in the
inverter, such as the AUX functions, are not compensated for temperature.