Need stereo battery bank help

[natemx231]

So I have a question to see if I'm on track for a proper battery bank to go with my stereo and alternator. I have a 2003 SAN 210 with a stock 70 amp alternator. I plan on keeping the Kirkland 27 group on switch 1/starting battery. On switch 2/stereo bank I'm going to buy 2 Deka 8A31DTM in parallel. I have three JL amps XD 600/1 sub, XD 600/6 boat and a HD 750/1 tower. So 1950 total amps. How long of run time can I see while the boat isn't running and do I need to upgrade my alternator? Does anyone have any better options or ideas? I'm hoping Brett Yates (polar bill) will respond.


Thank you for your input Nate.

[TX-Foilhead]

I'm heading the same direction, currently have XD400/4 and a XD600/1. I will be adding 2 HD 750/1's, one to replace the sub amp and another for the tower. Currently with a VSR and 2 group 27's and a 105 amp alternator I have run 8 hrs with no issues and no motor. Typically we ride for 2 or 3 hrs then the stereo is on at the dock for 45 min or so. It takes about 20 min for the 30amp charger to top off all the batteries. I expect that to stay about the same with new additions because I can't think of a senario where I would run all 3 amps hard. Most likely the 750/1's while we're riding and the the 400/4 and a 750/1 when we're stopped.

You won't find Bret Yates over here, he on WakeWorld.

[natemx231]

I'm heading the same direction, currently have XD400/4 and a XD600/1. I will be adding 2 HD 750/1's, one to replace the sub amp and another for the tower. Currently with a VSR and 2 group 27's and a 105 amp alternator I have run 8 hrs with no issues and no motor. Typically we ride for 2 or 3 hrs then the stereo is on at the dock for 45 min or so. It takes about 20 min for the 30amp charger to top off all the batteries. I expect that to stay about the same with new additions because I can't think of a senario where I would run all 3 amps hard. Most likely the 750/1's while we're riding and the the 400/4 and a 750/1 when we're stopped.

You won't find Bret Yates over here, he on WakeWorld.

What amp are you putting with the HD750/1 sub amp? And what did you have with the 600/1? I just bought the XD600/1 to go with a JLW612. HD750/1 paired with a set of REV10's and the XD600/6 for the boat speakers.

[TX-Foilhead]

13TW5, I got a deal on the pair of amps that I couldn't pass up, same thing with the sub. I haven't mounted it yet, just powered it up for a couple of songs and it made a difference, the 600/1 wasn't being used to its full potential. I wish there was more space in the boat because I would rather have a W6 or a regular sized 12, but the box just gets in the way. The 600/1 will move into my truck, I really like the XD amps, they are absolutely tiny even when compared to the HD's

[natemx231]

I'm heading the same direction, currently have XD400/4 and a XD600/1. I will be adding 2 HD 750/1's, one to replace the sub amp and another for the tower. Currently with a VSR and 2 group 27's and a 105 amp alternator I have run 8 hrs with no issues and no motor. Typically we ride for 2 or 3 hrs then the stereo is on at the dock for 45 min or so. It takes about 20 min for the 30amp charger to top off all the batteries. I expect that to stay about the same with new additions because I can't think of a senario where I would run all 3 amps hard. Most likely the 750/1's while we're riding and the the 400/4 and a 750/1 when we're stopped.

You won't find Bret Yates over here, he on WakeWorld.

What brand and style of batteries are you running?

[TX-Foilhead]

Some cheap Interstates from Sam's on the stereo side, and Deka AGM for the starter that about 2 years older. Thought long and hard about some AGM's or 6 volts, but in the end I decided to just go cheap. If they crap out quick then maybe next time I'll do something different. At the time I didn't have a charger so I kind of hated to spend $$$ on nice batteries when I couldn't give them the best care. I was also concerned that all 3 weren't new at the same time, so I seperate them all from each other when I put the boat away so hopefully if one goes out it won't take the rest.