Must 3024 VPM and custom LiFePo4 battery charging settings

[gizmoboss]

Hello

Inverter Must 3024 VPM
Battery: custom 25.6V LiFePo4 8x EVE 280Ah (BMS JKBMS 100A 8S 1A)

I need to know right setting for charging my battery is optimal

Now i use settings on inverter side:
14. Battery type: USE
15. Bulk changing voltage (CV voltage): 28.6V
16. Floating voltage: 27.2V
17. Low DC cut voltage: 23.8V
18. Battery stop discharging voltage when grid is available voltage: 24V
19. Battery stop charging voltage when grid is available voltage: 28.6V


Maybe there is something I need to change?

P.S.: Yes, I saw a sticky post with recommended battery voltages, but I'm more interested in menu items 18 and 19.

 

[sunshine_eggo]

15. 27.6V preferred depending on absorption duration.
16. 27.0V - generally regarded as the best float voltage to hold cells at near 100% and not risk low current overcharge.

18 and 19 are preference and what works for you. I'm guessing it's like a Growatt where it acts like a float valve... charge when battery hits 24V and then stop charging when battery hits 28.6V (no absorption period).

 

[meetyg]

What mode are you running it on?
Menu items 18 and 19 are mainly for SBU mode.

 

[gizmoboss]

What mode are you running it on?
Menu items 18 and 19 are mainly for SBU mode.

i use this mode

 

[meetyg]

i use this mode View attachment 230812

OK, so in UTI, these values (18 and 19) have no effect as far as I know.

 

[gizmoboss]

OK, so in UTI, these values (18 and 19) have no effect as far as I know.

The documentation is Great on Must )))

 

[meetyg]

The documentation is Great on Must )))

I agree...

By the way, does your model have SUB mode?

Do you have solar connected?

 

[gizmoboss]

I agree...

By the way, does your model have SUB mode?

Do you have solar connected?

Yes, but I use the inverter as a backup power source when the power goes out.
(This is quite relevant in Ukraine )

I don't have solar panels.