Yes
The difference is that in using an inverter there is an efficiency loss, just to operate it. The inverter may be 80%-95% efficient, but a loss none the less. Using 12V direct entails no such energy loss. So 12V is good, and an inverter good and required for 120V AC devices that only operate on that.
Inverters have cooling fans for their electronics and the fans are responsible for much of the energy loss.
As to a TV, you'd have to do the math, using the specifications of the TV model in watts at usage at its rated voltage.
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