New deck, 700 watt amp and a 10" sub: Battery question

[Rugglesworth]

I have a 95 sea ray 180 sig with a 4.3lx with 363 hours. I just wired in a deck, 700 watt amp (old so probably more like 350 max) and a 10" clarion sub. My question is, if I'm only running it while the motor is running, am I good with one battery?

 

[dingbat]

I have a 95 sea ray 180 sig with a 4.3lx with 363 hours. I just wired in a deck, 700 watt amp (old so probably more like 350 max) and a 10" clarion sub. My question is, if I'm only running it while the motor is running, am I good with one battery?

RMS or Peak Power rated?

Watts/voltage = 700W/12.5V = 56 AH

 

[Scott Danforth]

What size alternator? Stock 45 amp?

You may be OK with a single battery if you never key off

 

[Rugglesworth]

RMS or Peak Power rated?

Watts/voltage = 700W/12.5V = 56 AH

peak. I won't be cranking it either, at least for long periods. I'm on a small lake and I like music but not everyone will want to hear it all day long and I respect that.

 

[Rugglesworth]

What size alternator? Stock 45 amp?

You may be OK with a single battery if you never key off

Yessir it's the stock alternator. I won't be having it up very loud I just like to have some bottom end in the music. It's just to back up the old stock 2 speaker system. The deck powers the 2 speakers and the amp is powering the sub

 

[dingbat]

peak.

Well, in that case your looking at 27 AH