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Old 06-24-2013, 10:16 PM   #1
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Default Install 2 Batteries On a Maxum 1800 SR3 or Buy A Deep Cycle Marine Battery?

Im looking at installing 2 batteries on my 2005 Maxum 1800 SR3 and was wondering if anyone has done this on this boat and how they did it? Where they mounted the other battery ETC.

I just put a 1200 Watt Amp with 4 speakers in the boat and plan on using the stereo system quite often and with the boat not running. Not sure if this was the best option so I dont end up with a dead battery or just packing around an extra? Maybe just one GOOD deep cycle marine battery? Any suggestions would be appreciated!
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Old 06-24-2013, 10:43 PM   #2
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If it looks like adding a second battery is not going to be possible. Swap out current with a AGM Deep Cycle and buy a jump box to bring on board.
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Old 06-24-2013, 11:09 PM   #3
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Thanks! Thats what I was thinking too if I didnt do 2 batteries. What is the procedure for running 2 batteries? How would you set it up? Im sure its not as easy and linking them together.
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Old 06-24-2013, 11:57 PM   #4
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My son has an 18 foot cobalt and with his earth rattling stereo he has installed a two battery setup.He had plenty of room for all his additions. All the boats 12 volt acess. are on the deep cycle house battery and the starting battery for the engine.

Roger
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Old 06-25-2013, 12:07 AM   #5
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Quote:
Originally Posted by biggerseagar View Post
My son has an 18 foot cobalt and with his earth rattling stereo he has installed a two battery setup.He had plenty of room for all his additions. All the boats 12 volt acess. are on the deep cycle house battery and the starting battery for the engine.

Roger
How did he hook it up? With a relay or just parralell.

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Old 06-25-2013, 11:36 AM   #6
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for you application see diagram 1 in the attached link.

http://www.perko.com/images/catalog/...500INS1%29.pdf
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Old 06-25-2013, 01:01 PM   #7
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Yes diagram #1...... so you will need an islolater, battery cable and a new battery. Couple hours of your time to map all this out. Make sure you direct wire the stereo to the new battery with a fuse protection. As far as a charging system I would get something portable that can be used where the boat sits on the trailer at home if that is what you do. Imho
Good luck

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Old 06-25-2013, 01:19 PM   #8
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Ditto Diagram 1. It should be very easy. Look for any falt surface where the battery will fit. Here are some other resources I found when i did a search:

http://www.maxumownersclub.com/forum...hlight=battery

http://www.maxumownersclub.com/forum...hlight=battery

http://www.maxumownersclub.com/forum...hlight=battery

I would be going to House/Starter model where one battery is dedicated for the starter and the other dedicated for the 12v systems (particulrly when not running). The start ideally should be a starting battery. The 'house' batttery should be a deep cycle an the larger the capacity the better. I prefer AGM batteries in general for a number of reasons and would be considering an AGM Deep Cycle for the house side. However, this will also require that you have a means to recharge the battery as well. I'd be considering an onboard, charger.
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Old 07-04-2013, 08:33 PM   #9
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I have 2005 1900 sr3 with two batteries 5.0 EFI i/o. Both batteries are on the port side behind seat
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Old 07-05-2013, 02:32 PM   #10
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I used this.
http://www.charlesindustries.com/main/battcom.html
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Old 07-15-2013, 01:58 PM   #11
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That is a neat item. It allows you to dynamically charge both batteries from the alternator. Much better than only being able to charge the one that is selected while the boat is running.
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