Had a problem with an old voltage regulator which was always charging at around 15.5 to 16 volts. Replaced it with a Wells regulator. It was charging around 13.5 to 14 volts. Today after taking the car out I see that I'm around 11 volts according to my gauges. I had the battery checked out just before I changed regulators and was told it was OK. Isn't 11 below the minimum??