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Message: [QUOTE="Big Bore, post: 198148, member: 760"] Kinda what I was getting at, power (watts) = volts x amps. Maximum power output of the alternator won't go up if voltage is increased. So if the alt is 180A@12v, max wattage is 2520. Bumping up voltage to 16v will make max amps 157.5A. Unless there is some circuitry in the alternator that I'm missing. I'm betting that 18v wasn't good for his batteries. I'm pretty sure a constant 18v will be boiling the batteries (16v is an equalize charge (boiling) for 12v deep cycle batteries, and only for a couple hours to desulfate the plates). [/QUOTE]

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