OutBack Integration Guide
Rev1.6_01-22-22 
Set Up Fortress Power Lithium Batteries with Outback Systems 
505 Keystone Rd, Southampton, PA 18966 . (877) 497 6937. sales@fortresspower.com . Fortresspower.com 
3 
Charge Controller Settings 
Charge Controller 
Absorb Voltage and Time 
55.2, 2 hours 
Float Voltage 
54.4 
Rebulk Voltage 
52.5 
DC Current Limit 
LFP-10: 80A per battery ÷ # of controllers 
eVault: 170A per battery ÷ # of controllers 
eFlex: 55A per battery ÷ # of controllers 
Absorb End Amps 
1A 
Communication Settings  
FLEXnet DC (FN-DC) 
If FLEXNET DC display voltage is not within 0.1V of 
inverter terminal voltage, calibrate Outback equipment 
Battery Amp hour 
eFlex :105Ah per battery 
LFP-10: 200Ah per battery 
eVault: 360Ah per battery 
Charged Voltage 
54.0V 
Charged Time 
15 minutes 
Charged Return Amps 
1A 
Battery Charge 
96% 
Relay Invert Logic 
No *User adjustable 
Relay Voltage 
High = 53.8 ; Low = 51.2 *User adjustable 
Relay Delay 
High = 1, Low = 0 *User adjustable 
MATE3/MATE3s 
FLEXnet DC Advanced 
Low SOC Warning = 20% *User adjustable 
FLEXnet DC Advanced 
Critical SOC Warning = 10% *User adjustable 






