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What is the advantages of using 2, 6 volt batteries verses 1 12 volt ,,, the 2 6 volt will be deep cycle ,and the 12 volt would not be , it is a 8d type.......thks
I see nothing but disadvantages if you're using them to start an outboard. But for a 12v trolling motor I could see it. Assuming they're each the same physical size as most 12v deep cycle batteries batteries, you'd have roughly twice the amp capacity, which should last about twice as long. Of course you could accomplish pretty much the same thing by connecting two 12v deep cycles in parallel. The 6v's would have to be connected in series.
you need a 12 volt starting battery for the engine, if you run a lot of accessories, the 6 volt in series, charge lasts a lot longer. most electronics are low load.
Thku guys for the quick reply,,,,so i guess they not sutable for a starting, but good for the other power requirements......and yes they would be hooked up neg to positive then 2 cables running back to the back of the boat . My one goal was to get some weight out of the back of the boat as well, Will 2 rv style, starting deep cycle ie dual purpose batteries be better? or how bout the 1 big 8d? thks
I have heard of using 6 volt golf cart batteries in parallel to create a battery bank with greater capacity. I have heard it works quite well. The setup is used mainly for deep cycling, providing power for accessories or trolling. I can't see the advantage in the starting circuit.
(Series connecting two 6volt golf batts. give 12 volts,--parallel would give 6 volts) two sixes in series give lotsa amp hr capacity.+ they put up with a lot of deep cycling longer than 12v deep c. batts will.
I would not move the battery to the bow of the boat. Vibration is a major killer of batteries and the bow just pounds too much.
Two 6 volts batteries is no better than one 12 volt battery. Either way you have 6 cells. Now if each of the 6 volts is the same size as your 12 volt then they will last longer but if you buy a bigger 12 volt that matches the size of the two 6 volts then they will last the same. Match the amps and capacity and I would prefer the 12 volt.
An 8D isa cranker,not deep cycle.Two golf 6volts.will kick 2,12 volt, size24 deeps in the butt everytime! We use them on inverter house banks exclusivly. On paper they may look the same butt in the real world there is no comparison.
well, thks guys ...that narrows it down ....Boatist i have no choice but up front .to much weight in the stern .trying to balance my boat some. Waldo ther are 8d marine deep cycle batteries available , mind u $260 ....Im leaning in the agm or spriral construction type ...but pricy as well ....
Golf batterys are tough as far as vibration goes.All that acid slingin around up ft.could be detrimental.Is the boat in the picture what you r working on?Is YOUR 8d a cranker? AGM is good but won't charge at the same rate as your flooded battery and they don't like to be overcharged.Battery banks should be the same type.
A 24 size AGM cranker in the back and 2,27 size AGM house up ft and you are set!(and broke!)Connect all the batt.grounds together and put a "on-off" switch in the + cable tween the house and start bank for those engine off periods.Sorry if I wuz too nosey!
You are really going to be sorry if you relocate your batteries to the front. You may suffer bow steer while underway. What makes you think you have too much weight in the back?
I understand Dreamchaser wanting to get some weight out of the back of his boat. I have a 16ft Starcraft and I have had the same concern. With a 70hp motor, 2 batteries and 2- 6 gallon gas tanks in back, that just seems like a lot of weight in back. Not to mention just wanting a little more separation between the gas and the batteries.
Lube Dude ...I have had a porpoising problem with my boat since i changed motors up to the v4 weights ......And now that i have a 1994 120 johnny on which weights 365 + - , A 1992 9.9 2 stroke xlong merc which im guessing is about 80lbs? or more.... I do have smart tabs but when i set them down more they reduce speed .... i think im to stern heavy .......therefore a battery in the front is one way to get some balance. The 120 now launches the boat up and out very well ....so i dont see bow steer being a problem . maybe at trolling speed though ....its either sand bags or a battery to try to hold her down ......any thoughts?
