home made 12 volt generator

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DrivingMissLazy:
in 50+ years of RV'ing I only had an alternator on a vehicle quit one time. At the next town I stopped at Sears and purchased a small battery charger. I then started my genset and connected the battery charger to the coach battery so I had lights and the other needed electrical items. I did not have an inverter. In fact this was before the days of the inverter. I did always carry the battery charger after that, but never needed it. This was on a gasoline coach. A diesel coach requires very little DC power to keep running.
Richard

Quote from: Jeremy on January 24, 2007, 10:52:15 AM

Ever since I have been driving I have had a morbid and irrational fear of being stranded with flat batteries - so I'm liking this idea of having another way of charging batteries should my generator fail (and potentially a much faster way of charging too). I also like the whole 'inventiveness' thing, and definitely disagree with those who say 'You must do it this way because everyone else does'.

What would be a really neat solution perhaps would be to arrange the additional small engine so that it could somehow be made to turn the existing bus alternator, rather than having to supply a new alternator and all the associated cables and switching etc required. It wouldn't really be feasible to change belts over each time, but I expect a clever person could work out some kind of electrical clutch mechanism to allow the alternator to be turned by either engine. Perhaps the electric clutch thingy off a belt-driven air conditioning pump could be adapted?

Jeremy

Dallas:
Quote from: DavidInWilmNC on January 24, 2007, 11:14:56 AM

It might be more reliable and a lot quieter to use one of the smaller Yamaha or Honda generators.  You could then power a charger for the batteries.  It might be more economical than having to run a big genset just to charge the batteries.  Of course, you'd have to have gasoline on the bus, but some of us do anyway.

David


And now we've gone Full circle!  :D :D :o :o

The Honda and I think the Yamaha  use inverter technology to create electricity. Which means, if your batteries go flat, you crank up a small engine to run an alternator to run an inverter to run a battery charger to charge the batteries so the engine will start and run the alternator to charge the batteries to run the stuff in the coach and they'll go flat again so you start all over!    ::) ::) ::) ::)

How about getting really basic and buying one of those war surplus Organ Grinder type generators that you crank by hand for hours and hours and hours to charge your batteries so you can start the generator to run the inverter to charge the batteries to start your main engine to run all the stuff.....

Wow, charging batteries is a hard job to think about.

captain ron:
I have a 24 volt electrodyne alternator I bought off of E-bay 2 or 3 years ago. It was a new rebuild from detroits city transit. I don't know the specs on it as far as amp's, some of you may. I also have a brand new Honda generator remote starter. My inverter is 12 volt and I have no intentions of changing that, works fine. Can I use all of this stuff to build a cool genset or should I put it on E-bay and start over? Don't know if there's a way to rectify,capacitate, modulate or just reduce voltage. Those other 3 words were just thrown in there to impress you guy ;D

DrivingMissLazy:
It all depends. I assume your coach is 24 volts and you have and existing alternator on it to charge the coach batteries. I assume your house batteries are 12 volt. Although the electrodyne is available in different amp ratings, I really do not see how you can use it to maintain your 12 volt house batteries. I have no idea what the Honda remote starter is. Just a remote start panel?
I would guess you would be better off, since you now are an educated electrician, to dump this stuff on ebay and get what you really need which I again assume is a 120 volt genset.
Richard


Quote from: captain ron on January 24, 2007, 12:06:47 PM

I have a 24 volt electrodyne alternator I bought off of E-bay 2 or 3 years ago. It was a new rebuild from detroits city transit. I don't know the specs on it as far as amp's, some of you may. I also have a brand new Honda generator remote starter. My inverter is 12 volt and I have no intentions of changing that, works fine. Can I use all of this stuff to build a cool genset or should I put it on E-bay and start over? Don't know if there's a way to rectify,capacitate, modulate or just reduce voltage. Those other 3 words were just thrown in there to impress you guy ;D

Jeremy:
Quote from: DrivingMissLazy on January 24, 2007, 11:25:06 AM

in 50+ years of RV'ing I only had an alternator on a vehicle quit one time. At the next town I stopped at Sears and purchased a small battery charger. I then started my genset and connected the battery charger to the coach battery so I had lights and the other needed electrical items. I did not have an inverter. In fact this was before the days of the inverter. I did always carry the battery charger after that, but never needed it. This was on a gasoline coach. A diesel coach requires very little DC power to keep running.
Richard




When I said 'generator fail', I meant generator, not alternator. If I have flat batteries the only way I can start the engine is to charge the batteries up - and should the generator (or charger) fail I cannot do that - and even if everything works the charging would take quite a while. That's why I like the concept of an additional level of redundancy and and alternative way of producing power in an emergency.

Jeremy

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