Recently installed EFI, electric fuel pump. Already had stereo/amp and digitial ignition system in there. I have a one wire 60amp Denso Toyota style alternator on the car.

The stock Ammeter gauge used to be close to 12 o'clock, now it holds pretty consistent at just below 20. I still show the battery charging at 14.0 volts. Am I going to need to upgrade the alternator to get the amp gauge closer to 0, or is it ok to run these kind of numbers? If my Volt gauge shows the correct battery voltage can I assume I have enough alternator for the job?