Alternator DC charging unit

[jeep_bluetj]

That's a pretty common trick for a redneck welder. (Use a goodsized alternator, and don't regulate the voltage with the field - just supply 12v to it - or control "welding oomfh" by varying field current. Lots of folks put another alt in their jeeps for just this purpose.)

Interesting idea if you've got some parts lying about, and want to tinker.

Easier/cheaper would be a Honda generator. AND you'd get 110v too. (Assuming you are buying the stuff...)

Even easier would be to charge off your car, and just start it. Not nearly as efficient, but pretty dang easy.

Solar's a good bet too.

[Darren]

Slow RPM might not be enough for a standard car alternator. On my Blazer it doesn't start charging until 1500 RPM or so.

[MikeIA]

See this site for exactly what you're thinking:
http://www.theepicenter.com/tow02077.html

[Arne]

I think one reason we have switched from generators to alternators is the fact that alternators can charge at idle. Also, at cruising speeds, many cars are only turning around 1,800 rpm..

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quote: Yes: The alternator will charge the battery any time the engine is running (even at idle) if the battery's voltage is below the threshold (usually around 12 volts) so that the voltage regulator triggers the alternator to generate power (around 14 volts) until the battery is charged up.

[vwbeamer]

I have a working leece-neville HD 200 amp continous duty alt of a Bus for sale in the for sale section that would be perfect for a 12 vt Gen-vertor set up.

I hope this alright, if not a mod can delete it.