[PNW Fireguy]

The FET charge spike is something only experienced witht BB batteries that I have seen. It is a result of limitations of the internal BMS. I have no such issues with my RV pack nor the LIon Safari batteries used in my truck APU. As far as balancing and the charge voltage goes the subject would be a long one. If you don't balance the cells the proprietary internal BMS on drop in batteries can be susceptable to drop out due to low cell voltage vs low pack voltage. Balancing will only occur once the batteries have reached absorption.