Hello, I have a 110 Ah Victronenergy AGm deep cycle, from April 2021. -It is managed by a 30 A epever 3210AN mppt charge controller. With a 300 watt panel. -It is discharged daily on average of 15 / 25AH, which is with DOD 15/25%, which is ún SOC 85/75%. - has about 260 cycles - it is recharged to 100% every day (in the Canary Islands the sun is good even in winter) with the parameters of the victronenergy datasheet, boost 14.4v, float 13.8v, temperature coefficient - 24mV / C, boost time 1-3 hours . - once a month I do a slight equalization at 14.7v 3 hours. -I collect all data from victronenergy smartshunt and epever module for statistics, in particular I record the open circuit voltage every night after discharge. I noticed that for the first 2 months the ocv for each SOC rose slightly. Instead, since November, I have noticed a drop in ocv for each SOC of 0.07v. For example after a discharge of - 12AH before it had ocv 12.88 / 12.91, now after a discharge of - 12ah, it has an ocv of 12.82 / 12.85v. At 100% before it had an ocv 13.20 / 13.25v, now it has an ocv 13.12 / 13.18v. Instead the capacity remained the same. Only the ocv dropped by 0.07v. I did dozens of tests and collected the ocv after 30 minutes of the discharge 270 times, every night. Do you think this is normal? Could it be the temperature? From April to October the battery was discharged at around 26/28 degrees Celsius. Then I have another question: The victronenergy datasheet says: boost 14.2-14.6v. What does it mean? I am using 14.4v because I have done various tests with smartshuunt and between 14.4v and 14.6v, the current does not change. So I prefer a not too high boost voltage. I'm doing well? The Rolls battery technical service told me that I'm wrong and that I have to recharge with boost at 14.7 v and fixed boost time of 4 hours independent of the DOD. Otherwise my battery will sulfate in less than 12 months. He also claims that the victronenergy adaptive boost time is not good, because the boost time must always be the same, regardless of the DOD, because it always serves to recharge the last 20%. But I prefer to follow the victronenergy datasheet. Could the 0.07v drop in ocv be a sign of sulfation? (I don't believe because the capacity hasn't changed)
