I am sure i will get a lot of sluff but here it goes. 3 years ago I built a camper. Added 4 CALB cells. Every thing was 12vdc. 600w of solar and Victron controller. Top balanced, set the charge 90% discharge 20% and let it go. I never hit the 20%SOC. But I would every now and then check the voltage. The pack remained balanced. I don't think I seen more then 12 amp discharge and don't remember what max charge was. Controller was 50 amp. Guess was 20-25 amps. NO BMS. Coldest night was 14f. But i had the stove vent right next to batteries with an external temp gauge. Morning coffee would heat compartment up.
I now have added a BMS because I know more and can, but with low draw and diligent monitoring it can be done. Like someone posted, there are now better things to do.
