I have two 12 V 110 Ah Eco Tree (LiFeP04) batteries wired in series with both batteries having the following technical specification:
- Built-in BMS: Yes
- Nominal voltage: 12.8 V
- Nominal capacity: 110 Ah
- Energy: 1408 Wh
- Charging voltage: 14.4 - 14.6
My Iconica hybrid power inverter has the following settings configured:
- (05) Battery type: User Defined
- (26) Bulk charging voltage (C.V voltage): 28.2
- (27) Floating charging voltage: 27.0
- (30) Battery equalization: Disabled
Both the manufacturer of the batteries and the inverter were comfortable with the use of lithium-ion batteries being used and advised I disable the equalization mode.
Once the sun rises the hybrid power inverter starts charging the batteries. Checking the Bluetooth app for the batteries shows that one battery (A) gets fully charged while the other (B) stops charging at 62%. Despite battery B not being fully charged my hybrid power inverter believes both batteries are fully charged and stops the charging process.
Battery B stuck at 62% is capable of being fully charged if I charge it using a 12V LiFePO4 mains battery charger. Once it's fully charged battery B only charges until battery A becomes full. This continues until battery B goes below 62%, in which case while the Remaining Charge on battery A no longer increases battery's B Remaining Charge continues to increase until the SOC hits 62%.
Currently, the Bluetooth app for the batteries shows the following:
- Battery A
- SOC: 100%
- SOH: 100%
- Volts: 13.51 V
- RM/FCC: 109.97 / 110.0 Ah
- Battery B
- SOC: 62%
- SOH: 100%
- Volts: 13.37 V
- RM/FCC: 68.11 / 110.0 Ah
Have you any idea how I can get my hybrid power inverter to fully charge both my batteries?