OutBack Power FLEXmax 100 User Manual

Installation
16 900-0209-01-00 Rev A
Wiring Size and Requirements
CAUTION: Equipment Damage
Do not use a power driver or other power tools to tighten wire terminals. This can
damage them.
IMPORTANT:
Wire sizes must comply with all local and national codes. Input conductors and circuit
breakers must be rated at 1.56 times the short-circuit current of the PV array (per NEC).
OutBack 100% duty continuous circuit breakers only need to be rated at 1.25 times the
short-circuit current.

Please refer to the NEC and other electrical codes for PV array cable sizing, cable length, and cable ampacity.

Use #4 AWG (25 mm
2
) wire (minimum) for the output between the FLEXmax 100 and the battery bus bar
conductors. Smaller cables can reduce performance and possibly damage the unit.

The output can accept conductors up to #2 AWG (35 mm
2
). Larger conductors will reduce losses and ensure
highest performance of the FLEXmax 100. Use 90°C copper wire.

The maximum permitted conductor size for connection to the grounding wire terminal block is #6 AWG
(16 mm
2
). Use 90°C copper wire.

Install properly sized overcurrent protection devices. The minimum AIC (amps interrupting capacity) rating
required is 1125 Adc.

The largest PV array must have a rated short-circuit current of 64 amps or less under STC (Standard
Test Conditions). The output current limit of the FLEXmax 100 is 100 amps.

DC battery overcurrent protection must be used as part of the installation. OutBack offers both circuit breakers
and fuses for overcurrent protection.
Circuit Breaker Size and Requirements
The input (PV) and output protective devices must be sized according to the installation requirements.
OutBack offers a range of circuit breakers to meet these requirements.
Input Circuit Breakers

PNL-40-300VDC 40 amp single pole

PNL-40D-300VDC 40 amp double pole

PNL-60-300VDC 60 amp single pole

PNL-60D-300VDC 60 amp double pole

PNL-80-300VDC 80 amp single pole

PNL-80D-300VDC 80 amp double pole
Output Circuit Breakers

PNL-100-300VDC 100 amp single pole

PNL-125-300VDC 125 amp single pole

PNL-100-300VDC 100 amp single pole with plastic shield

PNL-125-300VDC 125 amp single pole with plastic shield
NOTE: The plastic shield provided with PNL-100-300VDC and PNL-125-300VDC provides important
insulation between devices. Install this shield before installing multiple adjacent circuit breakers. Do not
throw this shield away.

OutBack Power FLEXmax 100 Specifications

General

Brand	OutBack Power
Model	FLEXmax 100
Category	Controller
Language	English