I bought three sets of batteries from Neexgent, each set containing 4 cells, and they are performing well so far. Due to supply issues, the delivery of the last set was delayed by a few weeks.
I assembled each set of 4 cells into a 12V battery with a BMS and tested them at a 25-amp discharge rate, resulting in a voltage of 11.1 volts at the BMS(-) and battery (+) terminals.
The tested capacities ranged from 309Ah to 314Ah. The slightly lower test results could be due to factors such as undercharging, stopping the test at too high a voltage, or inaccuracies in my equipment. One cell was slightly fatter than the others, but their overall physical condition was good. I haven't put them into service yet, so I will provide updates later if I find anything noteworthy.
My Application:
- Marine inverter application with a 3kW inverter (Freedom SW3012) and a 150-amp charger
- Batteries configured as three 12V parallel batteries (4 cells each)
- Daly 300-amp BMS with parallel modules
I installed a 300-amp breaker/switch on each battery to allow for immediate isolation of issues and troubleshooting/testing. I have reconfigured the inverter/charger for this battery/BMS combination. The inverter charges at 200 amps and works fine with two or three batteries in parallel, but becomes unstable with one battery in parallel, causing the inverter/charger to trip and display a "voltage over" error. If anyone has any ideas about this, please let me know. I have run one cycle on the installed system and am ready for a real trial. I will provide updates if there are any new findings.
Neexgent EVE LF304 Prismatic LiFePO4 Lithium iron Cell 3.2V 304Ah 6000 cycle Long Life Energy Storage
www.neexgent.com