Product Manual

Operation
34 900-0145-01-01 Rev B
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 increase or decrease the charge voltage by 5 mV
per degree Celsius per battery 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.