This is one of the very few gauges
which you have the option of going analog or digital. Very few people run
aftermarket voltmeters in their FC's; the non-turbo FC's already have voltmeters
stock in the instrument cluster. It's surprising to see how much the
voltage fluctuates while driving.
During driving, the voltage should be at least 12.5VDC.  It'll be nicer if
it's over 13.0VDC at around 13.5VDC or higher.  Do not let the voltage get
over 15.0VDC, as this will cause potential problems with electrical components
and blow the battery up due to overcharging.
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