I need a way of powering the boats stereo out of water, engine off, for say 5 hours straight some days. Currently i have 2 batteries, 1 for the engine and the other for accessories "isolated". I will have access to 120 volt power. I dont know what to use to power the amps (3 of them that take a max current of 350 amps)for these days. I would use just a battery charger but they dont provide enough amps to keep the battery charged and run the stereo. Any ideas?
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