Originally Posted by dareo
Any significant electrical load takes more fuel. My stereo ccan consume up to 800 watts at full crank. That is over 1/2 hp of electricity. An alternator is lucky to be 50% efficient at best. So making 800 watts can take a full horsepower or more of engine power.
If you have a regular radio with no other equipment it is not significant.
that is not how amperage works. iv studied electrical theory. your alternator is able to put out a ceratin amerage, the engery losses of doing this are due from friction within the bearings and electro motor inside the alternator. this friction does not magicialy dissapier if you are not using the amps.
dang my spelling sucks.
oh. hehe. also turnign on a light does not take more electricity than running a light.