...10 amps max is 10 amps max no matter what the voltage
Saaay what?Wattage / Voltage = Amperage
10 Amps @ 250v = 2500 watts
20 Amps @ 120v = 2500 watts...Same load, different voltages.
Maybe the correct question would be: "what is the actual
rating for the 110v model?" - that I don't know! [I think you're talking about the STC-1000
by the way, STC-100 is 12v DC model]
(If you house burns down don't blame me...I'm not a certified electrical engineer)