Can You Charge Boat Battery While Still Connected. Use a charger that is designed to be hooked up and left. One of the most popular ways of charging a 12-volt battery is by using a vehicles alternator.
If your batteries are regular flooded cells they should be in an area where theres adequate ventilation while charging. This is what happens when you run your AC powered appliance connected to a 12v power inverter with a deep cycle marine battery and battery charger connected. It is the surface charge.
Just connect the charger and wait.
A word of caution if you run the battery down playing music or with lights for hours the charging system on the boat will not bring the battery back up sufficiently in a short boat ride. Is it safe to charge my boat batteries while still connected to the boats electrical circuit or should I disconnect before charging. But at least you know you can charge the battery while its still connected to your car. I am only talking about charging while in attendance.
