$1,669.99
I have had two of those JITA 12.8V 300ah batteries connected in series for several months now. So far working great! Using them to charge my plug-in hybrid car and provide back-up power for my house. Have a Victron charge controller and a 24V Giandel 4000/8000 inverter
I recently obtained four of the JITA 12V 300AH LiFePO4 batteries from Amazon. The instructions say to do a deep discharge and then a full charge to start. Mine are wired in a series/parallel configuration for a nominal 24 volt battery bank that can provide 400 amps. It is two pairs of series-wired batteries, the pairs being wired in parallel. I did the deep discharge to 21 volts, then used the charger that is part of my 24-volt Sigineer APC6024D Inverter which has a setting for LiFePO4 batteries. They charged nicely for 10+ hours then hit a point where one battery in each series leg went into over-charge protection mode. It seems like the BMS boosts the terminal voltage to somewhere around 18 volts to stop the charge current. (Can anyone confirm that?) So what happened is, one of the two series batteries in each leg was fully charged to ~14.6 volts, but the terminal voltages of other batteries were only around 13.3 volts. I presume this is because the charge current was shut off by the BMS in the fully charged batteries. I failed to check the terminal voltage of the batteries after the deep discharge, I assumed they would all have the same terminal voltage level but perhaps they were different. If so, I wonder if that caused one battery in each series-leg to achieve full charge before the other. I am going to carefully adjust the terminal voltages of all batteries to be equal (within 10 millivolts) then do another carefully controlled and fully monitored deep discharge / charge cycle.
Yes was looking at getting 4 in the next few weeks which would give me 1200Ah, but just found these VATRER 12V 460Ah LiFePo4 batteries with a 250A BMS for $1200. Need to do a little more research thinking of purchasing 3 which would give me 1380 Ah. Will also start a new thread here on these VATRER 12V 460Ah LiFePo4 batteries, https://www.amazon.com/dp/B0C6KKJBL...p_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM
Would be on my Catamaran in the tropics so low temp cutoff not an issue for me. Would be for anyone in cold climates
Just notices it does say it has Low/high temp Cut off. But need to do more research.
Also noticed the VATRER 12V 460Ah LiFePo4 batteries are in a metal case, don't think this would be good in a salt air marine situation, would stay dry but metal would not last unless its aluminum.
