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Old 08-12-2013, 01:21 PM
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2nd Alternator for AC power

Here's a question for the DC electrical guys.....

Info: 2006 F350 Lariat FX4, single alt (DC Power XP 250 amp)

Plan: I am exploring installing a dual alt. system, using the second alt. to charge a battery bank mounted to either the frame or in the bed and using that bank to power an inverter in the cab.

Question: Can I run the second alt. without plugging it into the PCM? I know in the dual alt. trucks the PCM controls both, but my battery charger will be controlling the charging.
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Old 08-12-2013, 06:00 PM
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Originally Posted by 06_Whitebull View Post
Here's a question for the DC electrical guys.....

Info: 2006 F350 Lariat FX4, single alt (DC Power XP 250 amp)

Plan: I am exploring installing a dual alt. system, using the second alt. to charge a battery bank mounted to either the frame or in the bed and using that bank to power an inverter in the cab.

Question: Can I run the second alt. without plugging it into the PCM? I know in the dual alt. trucks the PCM controls both, but my battery charger will be controlling the charging.
Sure, as long as you get one of the older style "1 wire" alternators. Then, as long as the motor is running it will charge. Just dont connect this alt to your truck batteries or you will cook your glow plugs when they cycle on.
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Old 08-12-2013, 06:04 PM
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Originally Posted by skanj0 View Post
Sure, as long as you get one of the older style "1 wire" alternators. Then, as long as the motor is running it will charge. Just dont connect this alt to your truck batteries or you will cook your glow plugs when they cycle on.
Correct if you run the second alternator make sure you have it hooked up as a true "stand alone" ie hooked to nothing but your inverter for your ac needs.
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Old 10-04-2013, 06:32 PM
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If you have the right size main alt. then you don't need to waste the money on a dual setup with extra batteries. I have a 2000 watt inverter with a single 250 amp alt. and zero problems. My $.02 worth
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