Ventilation is supposed to be an issue but it sounds like people do this in a closed engine compartment. Do I still need to do this with this type of charger, and if so, how do you do it without acid getting to the other components of the boat. Now I am accustomed to removing these when placing a regular charger on said batteries as so the cells can “breath”. The batteries the boat dealer gave me are the type that require water with the removable cell covers they are not maintenance free. Is this correct in my config just plug the charger in and leave it alone?. I understand I do not have to disconnect anything as to charge. Does this mean I can connect it to my 12v/24v setup one to each battery without danger of damaging the others?. One in particular is XPS I 5/5/5 DC SYSTEM 12/24/36 by Bass Pro Shops. I have seen the on board chargers that will automatically charge the battery when needed and or trickle charge the battery over months for maintenance. I am looking to buy a charger that will be the easiest in terms of charging as so I do not have to manually attach a portable charge. I have 3 batteries in my boat one 12 volt for the engine and components, the other two attached in series to make 24 volts for my trolling motor. Bass Pro Shop Xps Battery Charger Manual.