Originally Posted by
jfox8807
Yes batteries are key when running multiple amps and ur stock alternator my keep up with the demand it may not depends on how many and what size amps u run. I have 3 batts 2 xs power xp2000 for the radio and a xs power Xp950 for cranking. I have 3000 watts rms in my boat so the stock alt does not keep up with the amp draw but a good on shore charger is key so ur batts are conditioned for the day. I use the pro mariner pro sport 20 plus. Alternators suck as batterie charger anyway. Now I have also ordered a mech man 170 amp alt for my boat to help things out a bit but this is not neccary