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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