I just noticed that my alternator is only outputting around 12.0V with the lights on during idle, is this what you guys are seeing? I had realized that these cars strategically engage the alternator (my guess is to save fuel) mostly during off throttles. During the daytime, the car would idle with ~12.8V. I'm also seeing ~12.8V when I'm on the throttle. Off throttle (cruising), the car will engage the alternator to charge the battery with ~14.4V. I've been seeing this behavior since new. However, recently, I just stuck on a cigarette lighter voltmeter and monitored it during a night drive for the first time and saw something really strange. At idle and on throttle, the voltage dips down to ~12.0V, which caught me by surprise. Off throttle during cruising, it went back to the normal ~14.4V. However, it drops back to ~12.0V when I come to a stop and idle. The car isn't giving me any charging warnings, so I assumed this is normal?