I just bought Promariner 1.5 maintenance charger. I connected it to all my batteries (total of about 500 amp hours) and it does seem to pull them up to 13.2v, but the charger is really hot. Am I using it with too much battery? Is that normal for chargers to be hot?
Also, can I leave it on for, say, 3 months or should I turn it off sometimes?