I just got these batteries from Amazon (NINTHCIT Grade A 4PCS 3.2V 120Ah LiFePO4). They did not come with a datasheet. All 4 tested to be 3.28vdc out of the box (getting new meter so i can read mV). I'm assuming I still need to top balance though. I ordered a 30v-10a CC/CV benchtop charger for that. (I'm using this guide for top balance.
I have an Overkill BMS that came pre-programmed for LiFePO4 (see below). But I'm trying to figure out what settings to use on the MPPT. There seems to be varying opinions about recommended settings for LiFePO4.
I tried to match up these MPPT settings with similar settings from BMS.
Do these settings look sound?
I have an Overkill BMS that came pre-programmed for LiFePO4 (see below). But I'm trying to figure out what settings to use on the MPPT. There seems to be varying opinions about recommended settings for LiFePO4.
Code:
Overkill BMS 4S 120A settings (came preset for LiFePO4 with these settings)
Trigger / Release / Delay
Cell over voltage 3650mv 3500mv 2s
Cell under voltage 2500mv 3000mv 2s
Battery over voltage 14600mv 14000mv 2s
Battery under voltage 10000mv 12000mv 2s
Charge over current 130000mA 32s 10s
Discharge over current 130000mA 32s 10s
Charge over temp 65C 55C 2s
Charge under temp -1C 5C 2s
Discharge over temp 75C 70C 2s
Discharge under temp -10C 0C 2s
I tried to match up these MPPT settings with similar settings from BMS.
Code:
EPEver Tracer4215BN Settings (Must use user mode)
Over Voltage Disconnect Voltage 14.6
Charging Limit Voltage 14.2
Over Voltage Reconnect Voltage 14.0
Equalize Charging Voltage 13.8 (diabled by the duration setting
Boost Charging Voltage 14.2
Float Charging Voltage 13.6
Boost Reconnect Charging Voltage 13.3
Low Voltage Warning Reconnect Voltage 12.0
Under Voltage Warning Reconnect Voltage 12.0
Under Volt. Warning Volt. 10.5
Low Volt Disconnect Volt. 10.0
Discharging Limit Voltage 10.5
Equalize Duration (min.) 0
Boost Duration (min.) 120
Do these settings look sound?