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It varies a little depending on your brand, but the back of the television should give you a fairly good indication for power consumption (about 221W for a Sharp 42" LCD TV).

Then you'll have to check out to see if TV can handle a Modified Sine Wave (MSW) supply or if it needs a Pure Sine Wave (PSW) supply. You don't want to plug in your 42" TV and burn it out. The PSW inverter will be more expensive.

Based on the above, if you were to get a 300W inverter with a surge capacity for temporary higher loads (switching on the back-lighting fluros will draw more than 221W for a short time), although better to get a 400W one and see how it goes, that way if it all goes well you can also plug in your DVD player (making sure that it can also handle a modified sine wave voltage if you went down that path).

Then all you'll need to do is work out how long you want the inverter to work to buy enough battery capacity to keep you running.

Also, an inverter inverts DC to AC, a generator usually burns something to generate AC directly. To my knowledge there aren't any inverter generators.

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Q: What size inverter generator would you need to run a 42 inch LCD tv?
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