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Go Back   WakeWorld > >> Boats, Accessories & Tow Vehicles Archive > Archive through May 08, 2008

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Old    Nick (ndavis03)      Join Date: Jul 2006       04-23-2008, 8:19 AM Reply   
I have the standard battery that came with my boat, but just realized I have an Optima yellow top laying around. I plan on installing a few amps in the near future, so it would be worth installing the Optima. What is the best way to hook the Optima up? I have plenty of room for it around the existing battery.
Old    Leo Lasecki (malibuboarder75)      Join Date: Jan 2004       04-23-2008, 8:58 AM Reply   
I have a perko 2 way battery switch. Basically when you drain one battery, you switch to the other to start the boat up. You can't run 2 batteries in series because it will kill the alternator.
Old    Montgomery (lovin_the_wake)      Join Date: Jul 2007       04-23-2008, 9:00 AM Reply   
I use an isolator on mine and have never had a problem
Old    Jason (azpowerhouse)      Join Date: Jul 2007       04-23-2008, 9:25 AM Reply   
My battery switch has 3 settings, battery 1, batt 2, and then both. I usually run it on both(50 hours of doing it) so this is bad for the alternator?
Old    Nu Bu (05mobiuslsv)      Join Date: Apr 2006       04-23-2008, 9:37 AM Reply   
No it's not bad for it, it's just charging both when engine is running.
Old    Nick (ndavis03)      Join Date: Jul 2006       04-23-2008, 9:41 AM Reply   
My stereo shop told me that on my last boat, the main battery was hooked up together with the Optima yellow top. However, there wasn't a perko switch. Were they in parallel or series?
Old    Dave (bcrider)      Join Date: Apr 2006       04-23-2008, 9:45 AM Reply   
Part of the problem with running batteries in series from what I understand is that the stronger battery will pull a charge from the 2nd battery so your not really charging both batteries. It needs to be on one or the other.

In my boat the first battery is starting only. The second battery is for the stereo.

I use a solenoid isolater. I orginally had a diod style and a Alternator repair dude said I shouldn't use that style due to the fact that they don't pass the current as well. The nice thing with the solenoid isolater is that it is triggered by the ignition.

Check out the link below.

http://www.piranhaoffroad.com.au/products/dualbattery/dualbatteryinfo_isolator.htm
Old    Nu Bu (05mobiuslsv)      Join Date: Apr 2006       04-23-2008, 9:51 AM Reply   
Nick your batteries were in parallel.
Old    Montgomery (lovin_the_wake)      Join Date: Jul 2007       04-23-2008, 10:00 AM Reply   
I ran 2 batteries in parallel in a car one time when I was big into stereo comps. and I fried the main computer and some of the electronics in the dash
Old    Montgomery (lovin_the_wake)      Join Date: Jul 2007       04-23-2008, 10:01 AM Reply   
I'm using an isolator in my boat right now but if I was going to do it all over again I would definitely go with a perko switch
Old    Nu Bu (05mobiuslsv)      Join Date: Apr 2006       04-23-2008, 10:03 AM Reply   
I doubt is was becuase of the 2 batteries. It would do nothing but supply a larger reserve of battery power. It might be a bigger strain on the alternator, but it wouldn't cause your computer to fry. Maybe you accidentally wired them in series.
Old    Nick (ndavis03)      Join Date: Jul 2006       04-23-2008, 10:05 AM Reply   
This is all foreign to me, but how do you wire them in parallel?
Old    Nu Bu (05mobiuslsv)      Join Date: Apr 2006       04-23-2008, 10:06 AM Reply   
All you do is hook the positive terminals together and the negative terminals together.
Old    Nick (ndavis03)      Join Date: Jul 2006       04-23-2008, 10:08 AM Reply   
Thanks-thats what I thought, and thats what it looked like on my old boat.
Old    WakeShoe (wakeshoe)      Join Date: Jun 2004       04-23-2008, 12:13 PM Reply   
Perko Switch, Battery Switch, isolator? What do these do and what are the pluses and minuses of each?
Old    Is it summer yet? (trentj6930)      Join Date: Oct 2007       04-23-2008, 12:24 PM Reply   
If any of the batteries were in series you would have 24 volts and not 12. Now that will cause you some major grief!
Old    Montgomery (lovin_the_wake)      Join Date: Jul 2007       04-23-2008, 1:21 PM Reply   
hmmm maybe that's what I did - to + and + to - hell I was probably sauced when I did it too :-)
Old    Montgomery (lovin_the_wake)      Join Date: Jul 2007       04-23-2008, 1:23 PM Reply   
either way I recommend using a perko switch they're more effective and a lot cheaper
Old    Jay (jay_g)      Join Date: Apr 2006       04-23-2008, 1:29 PM Reply   
anyone have a diagram on how the perko is hooked up with a stereo? im a lil confused on how they work
Old    Leo Lasecki (malibuboarder75)      Join Date: Jan 2004       04-23-2008, 1:41 PM Reply   
I have a perko switch for sale if you interested. I was going to use it on my boat, but never got around to it.
Old    Bruce Mac (brucemac)      Join Date: Dec 2005       04-23-2008, 1:45 PM Reply   
search around there's tons of info on this board.

on my old boat i had a perko switch and a yandina battery combiner. the combiner charges both batteries under power, but isolates battery 2 after battery 1 drops below a certain level. pretty cool. it's essentially foolproof. even if your alternator went out and you drained battery 1, you'd still have enough juice in battery 2 to get her home.

now i have to do it all over again. :-)
Old    billy d williams (billy2603)      Join Date: Mar 2007       04-23-2008, 2:22 PM Reply   
Upload

Crude drawing of back of Perko.

Hook positive of battery one to "1" and positive of battery two to "2". All stereo, starter, and accessory power to "3".

Hook negative of battery one to battery two and then to negative of starter. Also, all stereo and accessory can be grounded to either negative battery post as they are connected anyway.

Turn dial on front of Perko to "1" to draw from/charge battery one, "2" to draw from/charge battery two, "all" to draw from/charge both, and "off" to disconnect system completely.

If you want multiple batteries for stereo, then hook starter battery to "1" and then hook all positives from stereo batteries to "2" (all negatives can still be connected across all batteries)
Old    Bruce Mac (brucemac)      Join Date: Dec 2005       04-23-2008, 2:54 PM Reply   
also remember that if it has an "off" posistion not to switch to or past this while underway. it's not good for the alternator. :-)

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