On any car, the battery's only job is to
A) start the car
B) provide an electrical reserve in the case of a of a generator
(alternator) failure.
All cars run off the the electricity generated by the generator/alternator.
Modern cars have much higher demands on the electrical systems than our old
British cars. Modern cars can run up to 200 Amp capacity for their
alternators. They rarely if ever use that amount of generating power, but
it is there if needed.
Hope this helps clear up the confusion.
Rick
On Wed, Aug 20, 2008 at 9:44 AM, Brits'n'Pieces (Eric Frenken) <
lists@brits-n-pieces.com> wrote:
> John, I don't know what you mean. Maybe because English is not my native
> tongue.
>
> All electrical consumers in a car are fed by the battery. I've seen no
> consumer fed by the alternator directly. Of course the battery is fed by
> the
> alternator, so the alternator feeds all consumers indirectly via the
> battery. I'm not sure about modern cars, but I know for quite sure that
> this
> is the way the electrical charging system works in our AHs.
>
> As you say, if you replace the original cable between alternator and
> battery
> (after upgrading to a 50 amp alternator) with a 50 amp cable, everything is
> fine. Maybe this is what you said and I didn't get it right. At least this
> is what I wanted to say.
>
> Best regards
>
> Eric
>
>
> I wonder if we are missing a point here. On a modern car the output from
> the
> alternator not only charges the battery when this is necessary but also
> drives all sorts of other electric equipment such as power steering, heated
> seats, fast warm up heater, entertainment units etc.
>
> As you say a C45 or C42 has limited output but if an alternator is
> substituted and extra lights are fitted it will be able to supply the light
> AND charge the battery at a good rate if it is low. In this case a thicker
> wire from the alternator is advisable. A 50 amp alternator and a 50 amp
> wire
> should be adequate for one of our cars because it would feed all the
> equipment and charge the battery at the maximum permissible rate if this
> were in a low state,
>
> Regards
>
> --
> John Harper
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