Proving Myles' point exactly. 25A x 12V = 300W. 1hp = 750W. Imagine bolting an electric motor directly to an alternator shaft. There woud be absolutely no mechanical losses. You run the motor up to 1hp. Because of the inefficiencies of the electric drive side of the contraption, the battery load is close to 1000W. At the same time, you have generated 300W out of the alternator leads.
Therefore, it takes close to 1000W of battery power to put 300W back into the batteries.
Back to the original request. By installing the alternator in the electrically powered driveline, you have installed a net 700W drain on your batteries. So now your batteries run out that much faster with absolutely no benefit.
Fair winds,
Eric
Marina del Rey, CA
--- In electricboats@yahoogroups.com, GNHBus@... wrote:
>
> sure thing, thanks for the input, ending note, from the internet, another
> rule of thumb
>
> It takes power to make power, and for every 25 amps that an alternator
> produces, it saps about one horsepower from the engine to drive it.,
>
>
No comments:
Post a Comment