Originally Posted by CheckerdD
I would be really interested in knowing how many of the "failures" are from people who have over taxed the system. The stock system puts out 400 something watts. Electric vest, PIAAS, GPS, radar detector, hand warmers and your near that point. Put on your turn signal and, honk the horn, and PSAPP. You have cooked it. Dave
The BMW system puts out full power (essentially some hair splitting possible) all the time and the regulator shunts the unneeded power to ground. This type of design is both cheaper and lighter than a field regulated alternator,..ie what you have in your car.