I just made the assumption that there had to be an inverter somewhere on the cable or maybe in the handle. Otherwise, how could it function to power a 120V appliance? Am I right or am I wrong - again?
When it comes to heat, DC power is exactly the same as AC (RMS) power. That includes the MSW inverters that will read low on most voltmeters (RMS voltmeters are kinda
rare and pricy). If there is an issue with running DC, it is the motor, not the heating element.
What "RMS" (
Root-Mean-Square) in AC means in simple terms is how it compares in heat to DC at the same wattage under the same load. So to the heating element, 117 VDC is exactly the same as 117 VAC (such as your 120 VAC in your house). RMS is the norm for AC voltage measurements (there are also peak AC, peak to peak, average AC--and the list goes on). But RMS is always the DC heat equivalent of AC in a heating element.
But motors are MUCH different. Some motors only work on DC others only on AC. So since the pizza thing had a motor, it most likely is designed for AC, which means an inverter is needed somewhere and best would be a true sinewave inverter, but most will accept a so called "Modified Sine Wave" inverter. But that is sales BS. They are really a modified square wave.
Your household AC is a pure clean sinewave. Pure sinewave inverters are more expensive, and often not necessary, such as for heat. But running motors or charging your Zero is often taking a chance and usually will not work as well, if not damage things.
-Don- Auburn, CA