T&T: (Potentially) Catastrophic Electrical Shut-down

[Ron Rogers]

Did you check your electrolyte level. Equalization on modern 3 stage 
chargers is time and should be temperature limited. You must remove the caps 
from lead acid batteries to permit the hydrogen to escape - the boat should 
be open.

After equalization, it is often necessary to top-off the batteries with 
distilled water. In fact, with hindsight, it would be wise to top them off 
prior to equalization.

Ron Rogers