iamdub
Full Access Member
Not sure if the design of the 2010 is similar to my 2006. The alternator is somehow connected to the "computer" as part of controlling the output. The voltage is high for awhile and then drops as the computer "thinks" the battery is charged after doing some starting work.
Yup- RVC (Regulated Voltage Control). Prevents unnecessary (over?)charging of the battery and load on the alternator. The reduced drag from the alternator when it's not needed increases fuel economy. It's nothing you'd ever realize, but it's still a factor. The reduced load and wear are the primary benefits.