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#1
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V21 Dual battery set up - suggestions ?
Currently - 1 battery in the transom battery storage spot.
Considering- dual battery system, leaving the rear battery for starting the engine, plus the other battery inside the cuddy to power everything else. Then a high quality switch that allows for an " all " position to use both if needed for engine starting. Anyone have a set up they want to show pics or talk about ? Thanks Last edited by bgreene; 12-08-2011 at 05:44 PM. 
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#2
12-08-2011, 07:38 PM
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I have dual batteries in the console (CC boat). I don't have any pics right now but it's as follows.
Batteries mounted in console 4 way switch mounted in the cubby under the steering wheel 1 AWG running from engine to switch 1 AWG from batteries to switch Power from the switch common to my fuse panel Ground from the battery to fuse panel The cranking battery is on the 1 position, deep cycle on 2, they both run an a parallel on the both position. I run in the "both" position and switch to the deep cycle when at anchor.
__________________
84' Wellcraft Fisherman 18 / 96' Evinrude 130-Sold 20' Fisherman project underway www.ParkerFenceandDeck.com
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#3
12-08-2011, 08:19 PM
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check in to a battery combiner, or acr http://bluesea.com/category/78/79/pr...e/overview/329
btw there is a ton of good information on the blue seas site
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#4
12-08-2011, 10:44 PM
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I've put quite a bit of thought into this.... I believe I'm going to operate with one on/off switch between engine and starting battery and one off/1/2/both switch between everything else on the boat, the deep cycle, and starting battery with an acr between the batts..... the starting battery will ALWAYS be connected to the engine and trim unit except when stored... the multi switch will generally be switched to position 1 and run EVERYTHING except the engine and trim pump from the deep cycle but by switching it to both I can double up to start the engine from the deep cycle or by switching to position 2 I can run accys off of the start battery for whatever reason
The beauty of this setup is that I don't have to remember to switch anything and thus I can't accidentally run down both batteries while on the hook and the batts charge automatically. I'm also going to install an on board charger.
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#5
12-08-2011, 11:47 PM
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Quote:
The "off/1/2/both switch" is installed in between the batteries and engine/accesories, right? What is the point of the on/off switch? Sounds like the same set-up as mine, but with an on/off switch between the starting battery.
__________________
84' Wellcraft Fisherman 18 / 96' Evinrude 130-Sold 20' Fisherman project underway www.ParkerFenceandDeck.com
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#6
12-09-2011, 01:39 AM
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no the engine and trim pump are connected to the start battery via the on/off switch
everything else is connected to either or both via the off/1/2/both switch and in normal operation are connected to only the deep cycle at all times the big advantage of this system is that it is not touched except to disconnect batts for storage or in the case of a battery failure..... normally you have two separate systems and the start batt is only used for the engine then the acr allows the engine to automatically charge the start batt first and then the deep cycle
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#7
12-09-2011, 06:42 AM
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ditch the deep cycle battery, run two good starting batteries. You'll be much better off ditching the deep cycle for a starting battery. the only reason to have a deep cycle battery on a boat is if you are running a trolling motor or running a battery bank with an invertor. With the acr and a a off-1-all-2 switch(stay away from the perkos, they don't hold up well), Wire the automatic bilge pump directly to one battery, everything else thru the switch. If you want to seprate the house systems from the engine, you can run three on-off switches. One will be hooked between battery 1 and the engine systems, the next switch is hooked between the house systems and battery 2, the last switch goes between the two battery's to allow an emergency position to connect both battery's together. You can run the dual battery switch in conjunction with a separate on off, but it can get confusing, what switch does what. Boston Whaler runs two combination switches on their dual engine boats, you have to read the instructions beside the switches to figure out what they are trying to do each time you turn the power on. Look at the Blue Seas diagrams and the battery management panels.
Last edited by spareparts; 12-09-2011 at 06:56 AM.
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#8
12-09-2011, 08:57 AM
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Quote:
Is the combiner AKA an "isolator"??... 
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha 
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#9
12-09-2011, 09:05 AM
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Quote:
Is the combiner AKA an "isolator"??...
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha
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#10
12-09-2011, 05:37 PM
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the acr serves the same purpose as the traditional diode isolator but without the voltage drop. Also it has priority charging of the start batt and then thhe aux
I intend to use a deep cycle for my aux batt because I want to be able to operate the radio, sonar, lights, maybe a 12v fridge, and whatever else for extended periods of time without worrying about the batt..... I may at some point add troll'n'tabs but will have to add a third batt at that time. Below is a crude sketch of my wiring plan. Sorry it looks so bad but it's hard to draw with a 2" touch pad. batt switch.JPG BTW FWIW on my big welly, I have 3 monster group 31 deep cycles for house batts and 1 lil group 24 starting batt for both merc 260's and the genny Last edited by smokeonthewater; 12-09-2011 at 06:41 PM.
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Linear Mode
