[alchemy]

Sounds like you put a lot of water in the batteries. How many times have you cycled it from charged to way down? When I put a lot of water in the batteries (making sure they are all even) I have to charge and discharge a few times before it starts acting normal again and once or twice taking it way down to about 50% SOC. I wouldn't even check them until you did that. Then If they are still sub par check them individually. Maybe you only have one or two bad. Then depending on how much time you have 2.5 year old batteries should be recoverable unless the plates got damaged. The first and easiest restoration is just charging the hell out of them individually.