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Why Are Dual Purpose Batteries the Best for Center Console Boats?
Thanks for all the good info that I have received here.
Based on the info here, I have a feeling that the auther of the boat recommended the use of dual purpose batteries for a center console has to do with this reason: - The author didn't expect the use of a trolling motor in a center console, and a center console tends not to have anything like a refrigrator that uses a lot of amps. Therefore, he didn't think a center console needs any deep cycle battery; then he could save money and weight. This leaves the choice between starting batteries or dual purpose batteries. At this point, I don't know why he didn't simply suggest the use of one starting battery and one dual purpose battery instead of two dual purpose batteries; he suggested the use of starting batteries in other types of boats anyway; I don't see why he didn't suggest the use of a starting battery in a center console. This seems to be an inconsistence in his recommendation. May be he was trying to simplify his recommendation; therefore, he said something simple like this: "For a center console, I recommend using two dual purpose batteries." instead of saying something complicated like this: "For a center console, I recommend using two dual purpose batteries or one starting battery and one dual purpose battery." Based on the info that I have received here and the recommendation from the book, I can say these: - If I intend to use minimum electronic devices in a center console, I can follow the "two dual purpose batteries" approach. - If I intend to use a small number electronic devices (such as a radio and a fishfinder) plus a 12-volt trolling motor in a center console, I should use two deep cycle batteries and one of them must have enough cranking power rating (CCA rating). - If I intend to use a small number electronic devices plus a 12-volt trolling motor in a center console, but the motor is the kind that I need to crank a couple times before it can start, I should use two deep cycle batteries and _both_ of them must have enough cranking power rating (CCA rating). Am I understand this point correctly? Should I use a combination of one dual purpose battery and one high CCA deep cycle battery? Seem like the question is "What kind of batteries should I use if the motor is the kind that I need to crank a couple times"? No, the motor in my boat is not like that. I am asking this just for educational purpose. Jay Chan wrote: I am reading a book called "Powerboater's Guide to Electronic Systems". The book recommends using two dual-purpose batteries if the boat is a center console. A dual purpose battery is supposed to be good for both cranking the motor and serving as a house battery. I am wondering why a dual purpose battery is the best kind for a center console, but not the best for a cruising boat (he recommended a combination of a starting battery and a deep cycle battery for a cruising boat). What are the reasoning behind this? Won't a combination of a starting battery and a separated deep cycle battery is just as good for a center console? My center console is having two dual-purpose batteries just like what the book has recommended. I guess this is good. I just don't know why this is good. Thanks in advance for any info. Jay Chan |
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