Thread: Advice Needed: Volt difference
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Old 04-14-2016, 01:01 PM   #11
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Default Re: Volt difference

What size fuses are on the amplifier? That will show you how much extra amperage is needed from the alternator to produce the wattage you need. It may be "just 900 watts" but it's current being drawn that wasn't originally intended to be drawn.

Ohms law... Total power / Supply voltage = Current (inefficiency of amp not taken into consideration)

900 watts / 13.4v = 67.4 amps of "extra current" being drawn from your cars charging system that wasn't originally factored in. You're going to have voltage drop, etc., without a beefier system. It's just part of it.

Is that 900 watts RMS or peak/max? Can't find any kind of manual on that series.

No clue what "Big 3" means. Alternator, battery, cap?
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