2nd Battery

[Destroyer]

Yes, your deep cycle battery will do just fine. If you place it in your cuddy just make sure that the primary wires coming to it from your alternator are of the proper size to overcome the resistance of the extra length. You should already have some kind of recharging system on your engine, so second things first... What kind of engine do you have? That will dictate what kind of alternator, where to place it, and if it can be replaced. As to the do you need another one question, that depends on how much you'll use the batteries. So, if you are only going to use the second battery for some small electrical stuff, then you might not need to replace your present alternator with a bigger one. It all depends on the drain that your equipment will put on your present system. The easiest way to determine that is to add up the electrical requirements of all the different items you plan to power. That will tell you how much electricity you'll need, and conversely, how big an alternator you'll need to power all of it at the same time. Some items, like trolling motors, need large amounts of electricity. Other items like radios and fishfinders need comparitively small amounts of power. Your job will be to determine your maximum power consumption, and then size your system accordingly.