Product Manual

Operation
24 900-0198-01-00 Rev A
Compensation affects the
Absorption
,
Float
, and
Equalization
set points. The
Re-Float Voltage
set point
is not temperature compensated. Note that the
Equalization
set points are not compensated in OutBack
charge controllers.
Table 3 Temperature Compensation
Nominal
Voltage
Number of
2-Volt Cells
Compensation
(when above or below 25°C)
Maximum
Compensation
12 Vdc 6 0.03 volts per degree C ± 0.6 Vdc
24 Vdc 12 0.06 volts per degree C ± 1.2 Vdc
32 Vdc 16 0.08 volts per degree C ± 1.6 Vdc
36 Vdc 18 0.09 volts per degree C ± 1.8 Vdc
48 Vdc 24 0.12 volts per degree C ± 2.4 Vdc
EXAMPLES:

A 12 Vdc system with batteries at 10°C will compensate its charging to 0.45 Vdc
higher
than the set points.

A 12 Vdc system with batteries at 35°C will compensate its charging to 0.3 Vdc
lower
than the set points.

A 24 Vdc system with batteries at 40°C will compensate its charging to 0.9 Vdc
lower
than the set points.

A 32 Vdc system with batteries at 10°C will compensate its charging to 1.2 Vdc
higher
than the set points.

A 36 Vdc system with batteries at 35°C will compensate its charging to 0.9 Vdc
lower
than the set points.

A 48 Vdc system with batteries at 15°C will compensate its charging to 1.2 Vdc
higher
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 inverter with the HUB Communications Manager. If this is done, the
inverter 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.