User Manual
Additional Information
900-0204-01-00 REV B
©2017 OutBack Power Technologies. All Rights Reserved.
FLEXmax 100
Quick Start Guide
Dimensions
Height: 18.8" (47.1 cm); with fan 22.06" (56.0 cm)
Width: 8.8" (22.4 cm)
Depth to Wall: 6.0" (15.2 cm)
Mounting
o The FLEXmax 100 must be mounted upright at least
36" (91.4 cm) above the ground or floor. Shade is
recommended when installing outdoors.
o Conduit hubs must be connected to the conduit before
connecting to the FLEXmax 100.
o Clearance requirements are a minimum of 6" (15.2 cm)
above and below the controller.
o The unit can be mounted using either brackets (see
steps 1 through 4 in A) or keyhole slots (see B) on a
secure mounting surface. Follow the numbered steps.
o The cooling fan must be installed prior to operation.
It should be installed after mounting the controller.
Included in Package
o FLEXmax 100 Charge Controller
o 2 x Mounting Bracket
o Silicone Grease Package
o Cooling Fan (outdoor-rated)
o MicroSD Card (already installed)
NOTES:
Unit output is derated above 25°C (77°F)
Terminals
1
2 3 4
5 6
7 8
IMPORTANT:
Not intended for use with
life support equipment.
A
¼” hex head
lag screws
1
2
4
3
Symbol Indicator Pattern Controller Status Voltage
Off = less than 10 W PV available Battery rest
Bulk, Equalize, or GT Mode
Absorption
Float Float
Bulk or Absorption 1.91 Vpc
GT Mode
Battery Discharge < 1.91 Vpc
Critical Battery Discharge < 1.75 Vpc
Equalize EQ
AUX Active
Ground Fault Shutdown or other fault
Charging
Status
Auxiliary
Fault
LED Indicators and FLEXmax 100 Symbols
(See A in wiring section)
All off (with PV power available) = Rapid Shutdown
Terminal Functions
o 1 through 4: Rapid Shutdown terminals.
Terminals 1 and 3 connect to normally-closed
contacts on the RSI (Rapid Shutdown Initiator),
which is part of the OutBack ICS Plus system.
NOTE: If not using a rapid shutdown, use
a jumper wire to connect these terminals. If the
terminals are left open, the controller shuts down.
Terminals 2 and 4 are parallel connections.
They can connect to additional FLEXmax 100
controllers to perform the same function with a
single RSI.
o 5 and 6: Auxiliary (A
UX) terminals.
Used for diversion control and other functions.
o 7 and 8: Battery Sense terminals.
See Wiring section.
Date and Revision
October 2017, Revision B
Environmental / Safety Specifications
Bracket hole spacing: 5.13” (13.0 mm)
Vertical space between upper and lower bracket holes:
Approximately 20" when mounted
Float
Fan WiringFan Mounting
Fan Wire and Plug
Keyhole Slots
(#14 slotted wood screws,
7.9" or 20.1 cm spacing)
Securing Holes
(¼” hex head lag screws)
B
1
2