Hi there,before connecting and charging lifepo4(or any) batteries it is vital to get informed what and how to do things,also get some idea how the chemistry behaves ,if you haven't had lifepo4 before. It is vital for you and people are living with you to have the highest safety measures while handling and putting the cells together as a whole bank.Charging to 3.65V is a nogo as charging in series without a bms is also a nogo....It is also a good way to precharge lifepo4 cells individually,as it is possible in this way to value each one seperatlely: capacitance,discharge behaviour and length of charge.It is advisable at least with this first steps to keep near your cells and check them for correct connections and if they stay at temperature...When the cells arrive and they are new, they should have a SOC of roughly 30%: a cell with 314Ah nominal has got easily a capacity of 320-335Ah therefore 30% means that you need to charge them with about 215Ah(in total).With a 10A charger that would be more then two days entirely of charging.If your charger charges with less Ampere,the length of charge is regarding to.....Charging: when you charge lifepo4 cells in series there is a BMS needed.It's task is to protect the cells from over- and undervoltage and current,temperature ,as wll as balancing the individual cells to avoid cell drifting and shut-downs because of a singular cell's over/under-voltage.Charging -regardless of series or parallel connections is done where the lifepo4 cells feel comfortable with: charging over 3.45V and discharging lower then 2.9-3.00V per cell gives you very little extra gain while the cells might be stressed especially under harsh conditions i.e. high charging and discharging rates and high ambient temperature.There are other several things to do on a regular basis wich means a maintanance plan should be worked out and followed on a regular base(this includes to observe a complete charging/discharging cycle,temperature controls and connection controls)
You see this is not an easy "just putting it together job" but involves basic knowledge,some handywork and lots of time to check,check and check again.In this way cou would guarantee a certain level of safety for you and your family!Best of luck Frank
