Outback FM 80 and EG4 Lifepower 4 Batteries.

[Gairyc]

Hey Guys, I recently purchased a LifePower 4 to replace some aged AGM batteries. I am having trouble finding my old installer who can program the Outback FM 80 MPPT with the correct settings. Could anyone tell me the specs to setup this charger for this battery?
If it works out, then i'll be getting 2 more LifePower 4s.

Thanks
Gairy

 

[DIYrich]

Charge specs:

Recommended Charge Profile for DIY LiFePO4 Batteries *Sticky Post*

12V 4S LiFePO4 Battery w/ BMS: Absorption: 14.5V Float: 13.6V Inverter Cut-off: 10.7V-12V (depending on size of load and voltage drop etc) 24V 8S LiFePO4 Battery w/ BMS Absorption: 29V Float: 27.2V Inverter Cut-off: 21.4V-24V 48V 16S LiFePO4 Battery w/ BMS Absorption: 58V Float: 54.4V...

diysolarforum.com

 

[sunshine_eggo]

Hey Guys, I recently purchased a LifePower 4 to replace some aged AGM batteries. I am having trouble finding my old installer who can program the Outback FM 80 MPPT with the correct settings. Could anyone tell me the specs to setup this charger for this battery?
If it works out, then i'll be getting 2 more LifePower 4s.

Thanks
Gairy

FM80 works fine with LFP.

Disconnect the temp sensor to disable temperature compensation.

Simply set absorption, absorption time limits, absorption end amps, and float values to those desired.

Disable Equalization.

Assuming 48V

For slow, gentle charging that maximizes cycle life:
Absorption: 55.2V
Time: 2 hours
End amps: 1% of your capacity (1A per 100Ah battery)
float: 54V

For fast charging:
Absorption: 56.8V
Time: 30 minutes
End amps: 4% of your capacity (4A per 100Ah battery)
float: 54V