I had a 55 1st panel that I converted to 12v. All the gauges ran at 12 volts without a voltage reducer. I put over 100K on the truck after the conversion and never had a problem with the gauges.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.