John,
Only two connectors on a mopar regulator. One to alt, the other you can call sense. Type how to wire a 70's chrysler alternator in your search window for pinout. Wire the sense terminal to the center tap of a 10 k pot. The other two pot connections, one to power the other to ground. This should work as a divider without drawing to much power.
The regulator needs to be grounded to work. Use a dpst switch , one side to shut power off to the alt. The other as a off switch for the engine. Remember that the alt will need to turn faster to produce 24 volts than is needed for 12 volts. This means larger pulley on the motor. You will also need a engine large enough to produce the wattage you hope to obtain. Large enough to produce the wattage/hp at the rpm needed to produce your 24volts. A power curve plot for the engine would be helpful for this chore.
What is great about this gen is you can choose the rpm you are willing to put up with. My system charges at little over idle making it fairly quite.
Kevin
Kevin,Thanks very much for the suggestion (this is the "other" John").I had been thinking about getting a Honda 2000 - but this really appeals to my "tinker-er" side (which is probably a dangerous thing...)The interesting part about this is that I'd be able to set it up for 24V, and power the motor / batteries directly - WITHOUT having to buy a really expensive high amperage charger to take 120V back down to 24V.I had read something a long time ago on a "survivalist" web page about building a "poor man's generator" by driving a car alternator with a lawn-mower engine. Though an "edger" or pump engine with a horizontal shaft would be much easier to work with. They suggested using an old Chevy alternator, since they were "self-excited", and wouldn't have to have a battery connected. The idea was that you use the alternator to generate 12V, then use an inverter to get to 120V.But I really like the idea of using an external regulator, and tweaking the adjustment to get 24V.Do you know of any "how to" type documentation for doing this?My guess is that *maybe* my local alternator shop would be able to help me with this.It would be fun to find out!John
From: Kevin Pemberton <pembertonkevin@gmail.com>
To: electricboats@yahoogroups.com
Sent: Friday, January 10, 2014 12:52 PM
Subject: Re: [Electric Boats] Best portable generator?
Hi john,Best is a matter of opinion. I have used many portable generators and like the one I built using a 70's era chrysler auto generator with external regulator.The regulator control voltage can be manipulated with a resistor voltage divider to any voltage you need. The generator was well built enough to stand voltages over 120 volts. And the coils don't overheat when used to charge large banks.The generator I use is rated for 80amps, has a dual grove v-belt pully and has out lived other generators I have used to do this job, including honda's and other brand inverter gensets. That outlived is hour for hour.I have found that a 2" auto tailpipe along side of the mast sends fumes and noise away from passengers. When set up as a ventury draws enough cool air to not be a hazzard if touched.Hope this helps,KevinOn Jan 8, 2014 9:29 AM, <john@eng21.org> wrote:Hello everybody! I have a question regarding the best portable generator for my 30 amp (3 bank) charger. I am charging three 12 v batteries in series (each one has a separate connection to the charger). Many thanks in advance for your advice!
John
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