Can you run electronics on a generator?
Likewise, can you run a TV on a generator?
It's usually possible to power a TV with a portable generator but it's important to understand the wattage needs to know if your generator can handle it. To safely power your TV with a portable generator, it's important that the generator is an inverter.
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Likewise, can you run a computer off a generator?
You will be fine with the generator providing power to the computer (PSU). It may be "dirty", but your PSU will level things out (for the most part). Don't worry about it unless you are maxing out the generator to the point where your computer isn't able to draw the minimum it may need.
If your appliance has a plug, you can connect it to a portable generator, as long as the generator supplies enough electricity to power it. If they do, the appliances will perform poorly, and you may damage the generator. Moreover, the power cords may overheat and start a fire.