Thanks for your reply. Our boat is a 2014 and it is wired 1=engine, 2= house (2) and 3= thrusters. We don’t run AC equipment without shore power or generator.What year is your boat? The older boats were wired 1=engine, 2=thrusters, 3=house. At least that's how my 2009 25 classic was wired and what is shown on the wiring schematic. Also sounds consistent with what you described in the OP. Assuming you have four batteries the house bank will be the two that are wired in parallel.
As to how long the battery should last it all depends on what electrical components you're using. If you have an inverter and use any type of AC electrical equipment without the engine running it will kill a battery pretty quickly.
I got it from Amazon.I am having a similar issue with the reverse polarity light coming on when I plug in my portable generator. Where did you get your crossover plug, the one I got does not make a differance. Thank You
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