I have 2x6 V batteries with 232 Ah capacity setup in parallel to give me 12v in our travel trailer. I'm fairly sure I have overcharged them in the past and believe their actual capacity to be less than the 232. I installed the BMV 702 to both understand their actual capacity and guard against over or under charge going forward.
I've been testing the setup at home before we go dry camping. Running the heater and fridge and some lights over 8 hours or so, I pulled 23 Ah at a max draw of 5-6A. The battery got down to about 12.35V and the SOC showed 93%. My limited understanding is that 12V batteries shouldn't cycle below around 12.3V. If this is the case then it seems 93% is not correct. It also seems like my batteries are actually compromised in that they come nowhere near the 232 Ah.
I may be missing some factor in this and would appreciate your insight.