I want to wire a 12 volt cigarette style outlet into my trunk for a 100 Watt inverter. I picked the 100 watt unit because my computer charger states its output is 65 watts, and I figured I'd have a little reserve capacity with the 100 watt inverter. So if P=I x E, 100 watts = amps x 14 volts, or amps needed for this inverter would be 100/14= 7 amps, more or less. I figured I'd run a 10 amp fused circuit with 16 AWG stranded copper wire. Does this sound right, or am I overlooking something?