dual batts for big stereos...what are you running?

gatorboy112 · **Joined:** Sun Aug 05, 2012 11:31 pm **Posts:** 20

curious to know what batteries people are using who have big, high watt stereos in their boats.
anyone running three batteries?

RonN · **Posted:** Tue Sep 11, 2012 2:51 am

I'm running two: the starting battery that came with it and an Optima along with onboard charger. My system isn't huge though. Syn6 and Syn4 running 6- SW-650 inboats, 2x Pro-485s on the tower and a XS-12. The Optima holds up well.

nastya20 · **Posted:** Tue Sep 11, 2012 7:13 am

Running 3 interstate batteries; One group 24 starter and two srm-29's for the stereo. I'm running 4 amps ~ 3300 watts RMS;

mikeakatex5 · **Joined:** Fri Apr 15, 2011 7:22 pm **Posts:** 22

I'm running 2: the starter and a group 24 from costco for the stereo. My stereo is not big, arc 300.4 alpine m50 and the stock mtx amp running 2 rev8s alpine type s 12 and the stock 6 mtx in-boats. The single stereo battery is not cutting it. I have had the stereo shut off a few times bc it ran out of juice.

seannhowe · **Joined:** Wed Dec 14, 2011 10:33 am **Posts:** 17

What onboard charger is the best?

AJWest · **Posted:** Tue Sep 11, 2012 9:06 am

I'm running 4 batteries total. Three Interstate SRM-29 and one Interstate group 24 for starting. I'm using four JL amps so overall RMS is not high (2200 watts)...just clean power. I also have interior RGB LEDs and two Abyss underwater LEDs. I charge the stereo bank with a Promariner onboard charger and the starting battery I use a small Ctek onboard charger. I do float a couple/few hours each time out (plus underwater LEDs) and I don't want to deplete my batteries to the point of over working my boat's charging system so that's why I got the third stereo battery. I never want to depend on my alternator to charge my batteries and having the 3 stereo batteries will insure that my voltage level will be in a safe range. If you plan on going big with a stereo system or you're going to be the party cove boat then you might want to look at two 6 volt golf cart batteries like Trojan. You can two 6 volt Trojans and have over 500 amp hours.

AJWest · **Posted:** Tue Sep 11, 2012 1:24 pm

RonN wrote:

I'm running two: the starting battery that came with it and an Optima along with onboard charger. My system isn't huge though. Syn6 and Syn4 running 6- SW-650 inboats, 2x Pro-485s on the tower and a XS-12. The Optima holds up well.

You are running a wet cell battery (factory starting battery) with an AGM battery (stereo)?

gatorboy112 · **Joined:** Sun Aug 05, 2012 11:31 pm **Posts:** 20

nastya20 wrote:

Running 3 interstate batteries; One group 24 starter and two srm-29's for the stereo. I'm running 4 amps ~ 3300 watts RMS;

question. when you run it like this, obviously the small battery is used to start the boat and the other two for the stereo when you're floating, but what battery is selected when you're cruising and wakeboarding and slamming the stereo.

AJWest · **Posted:** Wed Sep 12, 2012 5:53 am

gatorboy112 wrote:

nastya20 wrote:

Running 3 interstate batteries; One group 24 starter and two srm-29's for the stereo. I'm running 4 amps ~ 3300 watts RMS;

question. when you run it like this, obviously the small battery is used to start the boat and the other two for the stereo when you're floating, but what battery is selected when you're cruising and wakeboarding and slamming the stereo.

All of them

RonN · **Posted:** Wed Sep 12, 2012 9:17 am

AJWest wrote:

RonN wrote:

I'm running two: the starting battery that came with it and an Optima along with onboard charger. My system isn't huge though. Syn6 and Syn4 running 6- SW-650 inboats, 2x Pro-485s on the tower and a XS-12. The Optima holds up well.

You are running a wet cell battery (factory starting battery) with an AGM battery (stereo)?

It's an Optima Yellow Top that I had from my old boat. Should I not?

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dual batts for big stereos...what are you running?

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