Powering trailer with an alternator
This is something that's been kicking around in my head. I've been researching alternators and i've seen 2 that have an output of 370 amps at 1200 rpm. If my math is correct then that is 4440 watts @ ...
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pnichols wrote:
Speaking of high 12 volt power output from an idling RV engine ... I'm surprised that not much/any mention has been made of using dual alternators. Many vehicles have this - often offered as an option when buying new or installed later by their owners.
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Yep spec'd dual alternators on our Ford E350, with fast idle and 225amp AGM battery bank.
After batteries are drained to around 11.9 volts, see +200 amps charging for the first few minutes. After about 15 minutes fast idle kicks down RPMs to normal and alternators output is around +40 amps with no load.
I've turned off the fast idle controller and alternator amp output is about the same as with fast RPMs.
The fast idle is mainly for running the seperate Bus system 40,000btu Air Conditioner while parked.
