Hello Nando, I have more info on the bank. All battieries are separated. My hydrometer was running between 1225 to 1250 or fair( not good or bad), on most of the good cells. Bat 1,1225 on 3 cells and 5.8v. Bat 2 1225, no reading no reading and 1.6v. Bat 3 1250 in all cells, 5.6v. Bat 4 no reading 1250 on last 2, 2.6v. Bat 5 1250 5.7v. Bat6 1250 5.6v. Bat 7 1250 5.8v Bat8 1250 5.6v. I still hear boiling. It looks like two bat with shorts. The bat had a diverision load so i don't think they were over charged. Some of the top covers on the batteries look like they have lifted slightly but not on the bad bats. Thanks for any help.