jay_stylz Posted November 4, 2013 Share Posted November 4, 2013 hey guys well as in previous posts i have listed that i bought a another boat now the issue i have is im used to my old boat set up which has a dual battery set up with a switch that allows me to switch them of off both or 1 or 2 ...... where as the new boat has 2 batteries also but looks like it has a master switch (does not alow to swtich between the 2) im not sure which is better and was wondering if i should change over to the dual battery switch? Link to comment Share on other sites More sharing options...
oz_brett Posted November 4, 2013 Share Posted November 4, 2013 Im with you on that one, I prefer & have mine set the same as your old boat. I choose the battery I start with and can select the one I want to charge while travelling usually both, When Im out over night I use the weaker battery while Im anchored giveing me the stronger battery or both to restart the motor. Link to comment Share on other sites More sharing options...
locodave Posted November 4, 2013 Share Posted November 4, 2013 Your old boat sounds ideal, that is what I am going to have on mine. Link to comment Share on other sites More sharing options...
Testlab Posted November 4, 2013 Share Posted November 4, 2013 You need to provide some more details on the way the batteries are wired. There might be a charge equalizer or a VSR installed which may be better than the dual switch. Link to comment Share on other sites More sharing options...
jay_stylz Posted November 4, 2013 Author Share Posted November 4, 2013 Not to sure what that is test lab but the wiring for the 2 batteries in the new boat is positive to positive and negative to negative then from one battery joins to the switch Link to comment Share on other sites More sharing options...
Testlab Posted November 4, 2013 Share Posted November 4, 2013 Ok... Gotcha. That's just two batteries in parallel so by all means get a dual switch and wire them individually to the new switch. When you're charging them off the engine after a nights use, start on the best battery and leave it charge by itself for a little while (assuming it didn't get much use running lights, sounder, etc). Then switch to the discharged battery only. Don't use the both position until the flat battery has had a good long charge by itself. With the batteries having approx equal (nearly full) charge then run them on "both." This will ensure the batteries get the best charge possible and keep them in good condition. So, start on 1 and leave it to charge for say 10 mins. Then switch to 2 (the flat battery) for a couple of hours while running. Then switch to "both." Link to comment Share on other sites More sharing options...
Day's Fishin Posted November 4, 2013 Share Posted November 4, 2013 Testlab is right the way they are wired is in parallel which increases the amperage output but will maintain the same voltage. Normally this is done when turning over a big motor. Jeff Link to comment Share on other sites More sharing options...
jay_stylz Posted November 4, 2013 Author Share Posted November 4, 2013 sweet thanks guys its only a 2004 yamaha 70 hp so should be all good i hope lol thanks for the help much appreciated Link to comment Share on other sites More sharing options...
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