Originally Posted by boondocking
A 200 watt pure sine wave inverter would do you just fine for that TV.
We bought a 12 volt TV but use a 200 watt Harbor Freight modified sine wave inverter for the DirecTV box and we haven't blown it up yet. I don't even notice it getting warm during use. Oddly, friend of mine who is a shop tech tore the 750 watt Harbor Freight modified sine wave inverter apart on his bench and tested it every which way including with an oscilloscope and he reported it to be extremely efficient considering the price and pretty darn clean as modified sine waves go. I'm hoping the same applies to the 200 watt and 400 watt Harbor freights that I have.
Most importantly, they seemed to work fine