OutBack Power FLEXmax Extreme Quick Start Manual page 2

Accessories and Devices
Ports and Connectors
MATE3
System Display
and Controller
SunSpec Modbus
Interface
NOTE: See the FLEXmax Extreme
Owner's Manual for details on the settings
available in the main menu.
Remote Temperature Sensor (RTS)
Battery performance changes when the temperature varies above or below room temperature
(77°F or 25°C). Temperature compensation is a process that adjusts charging to correct for these
changes. If not compensated, a battery may remain undercharged in cold temperatures and may
become overcharged when hot. Below room temperature, the charging set points are raised above
their normal values. Above room temperature the set points are lowered.
The RTS is attached to a single battery near the center of the bank. When charging, the RTS will
increase or decrease the charge voltage by a certain voltage per degree Celsius per battery cell.
The compensation value (the "slope") is adjustable from 2 mV to 6 mV. Most batteries use a value
of 5 mV.
This setting affects the Absorbing and Float set points. Equalization is not compensated in the
FLEXmax Extreme.
Total compensation is determined by measuring the
number of degrees C above or below 25. This number
is multiplied by the number of 2-volt battery cells and
the slope value.
Examples of Compensation
Cells Slope 25°C Vdc
(Volts) Value Temp ± Calculation Adjust
6 (12V) 5 mV 8°C -17 6 x 0.005 x 17 +0.5 Vdc
12 (24V) 3 mV 36°C +11 12 x 0.003 x 11 -0.4 Vdc
18 (36V) 5 mV 26°C +1 18 x 0.005 x 1 -0.1 Vdc
24 (48V) 6 mV 0°C -25 24 x 0.006 x 25 +3.6 Vdc
30 (60V) 2 mV 37°C +12 30 x 0.002 x 12 -0.7 Vdc
900-0151-01-00 Rev C.vsdx
©2013 OutBack Power Technologies. All Rights Reserved.
AXS Card MATE3 RTS
Fan Mounting Fan Wiring
Accessory Terminal Block
Install ferrite
clamps on
these cables
for EMI
suppression
1 2 3 4
GFDI
NORMAL
PV ACTIVE
O
F
OFF
PV ARRAY F
O
GROUND FAULT
DETECTOR O
INTERRUPTER
FAULT
PV
INACTIVE
Battery Sense Terminals
These terminals monitor battery voltage more accurately than the main cable connections.
A twisted-pair cable is recommended. The connections are made directly on the battery
terminals. NOTE: Overcurrent protection devices are not shown.
DC Terminals
PV+ PV- BAT- BAT+
Recommended
protection for sense
conductors is:
Fast-acting device

80 Vdc or greater

1 A or smaller

Cold resistance

10 ohms or less
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of the Alpha Group" are trademarks owned and used by Alpha Technologies. These trademarks may be registered in the United States and other countries.
FLEXmax Extreme
1 2
External Fault Terminals
(see page 1 for GFDI function)
GFDI or other shutdown functions can be used for multiple
controllers. Terminals 2 and 4 are wired to the next controller
as shown.
Controller 1 Controller 2
Contact Technical Support:
Telephone:
Email:
Website:
3 4
5 6
7 8
5 6
Auxiliary (AUX)
Terminals
Used for diversion control
and other functions
7 8
IMPORTANT:
Not intended for use with
life support equipment.
+1.360.618.4363
Support@outbackpower.com
www.outbackpower.com