question

Might not be a big difference, but because these are flooded batteries, I used 14.8 as my absorb voltage. Try a balance / equalization charge as well.

Did you check multiple batteries and multiple cells? Unless you're running a 24v system you could have an unbalanced bank.

Lastly, try a full capacity test to verify the SOC. IMHO it's not the end of the world to do a full discharge test and then recharge right away. It's extended periods of low charge that kill the batteries.

If you get full capacity at your current specific gravity, I don't see the problem.

Hi Akram. What you may be seeing with the V difference is temperature compensation. If it's hot there then that would explain it.

Absorption time may also be being 'touched up' by the Victron algorithms. If you don't think it's enough, just increase it some more to compensate.

Your SG shortfall amounts to ~2%, which is actually pretty good for daily-cycling batts. (I believe SG has a linear relationship with SOC). Pbs never reach 100% within 24hrs, and indeed some batt makers will even rate them at 100 hours. All regardless of what SOC your system is set up to show.

You could push them harder with a higher V, for a longer Absorb time, but all you'll likely do is bubble off water and increase their internal temp (bad for them).

Your '70% SOC' is a little unclear. Do you go down to that, or do you drop it 70% (ie. 30% remaining)? Big difference in life expectancy - really big.

I can't see you have a 'rectification' issue at all. Indeed a little gentleness applied may well pay you back with longer batt life. Take care..