From: Gary Vander Hart <gvanderhart@midco.net>;
To: <electricboats@yahoogroups.com>;
Subject: Re: [Electric Boats] Best portable generator?
Sent: Sat, Jan 11, 2014 1:36:43 AM
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John, You can get the same performance by purchasing a 24V DC welder. See this site for an explanation. ftp://sunsite.unc.edu/pub/academic/environment/alternative-energy/energy-resources/homepower-magazine/archives/3/03pg32.txt It is also possible to buy marine DC chargers. See the following. The reason most people get an AC generator is that they already have or need an AC charger to recharge the battery bank from shore power. Gary From: oak Sent: Friday, January 10, 2014 5:10 PM Subject: Re: [Electric Boats] Best portable generator?
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, Kevin On Jan 8, 2014 9:29 AM, <john@eng21.org> wrote:
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